Complete directory

All Calculators

Search or browse every calculator available on SmartsCalculator.com.

159 calculators

Finance

401(k) Calculator

Enter Current 401k balance ($), Annual salary ($) and Your contribution (%) and the remaining scenario settings to review retirement balance with this tool. The ending balance combines your deposits, modeled employer deposits and assumed investment growth.

Health

A1C Calculator

Enter Average blood glucose, Unit and Calculation type to review a1c with this tool. The relationship describes an estimated average, not the value expected at every glucose check.

Math

Age Calculator

Enter Date of birth and Age on date to review age with this tool. Calendar age counts birthdays and calendar boundaries rather than dividing elapsed days by 365.

Finance

Amortization Calculator

Enter Loan amount ($), Interest rate (%) and Loan term (years) and the remaining scenario settings to review monthly payment with this tool. Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant.

Finance

Annuity Calculator

Enter Principal amount ($), Interest rate (%) and Number of payments and the remaining scenario settings to review payment per period with this tool. An ordinary annuity pays at period end; an annuity due pays at period beginning.

Finance

Annuity Payout Calculator

Enter Principal amount ($), Interest rate (%) and Periodic payment ($) and the remaining scenario settings to review monthly income with this tool. The duration describes a modeled account being drawn down, including any final partial payment.

Finance

APR Calculator

Enter Loan amount ($), Interest rate (%) and Loan term (years) and the remaining scenario settings to review annual percentage rate with this tool. The estimate discounts the payment stream against the amount actually received.

Health

Army Body Fat Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review army body fat with this tool. The output is an equation-based percentage, rather than a direct measurement of fat tissue.

Finance

Auto Lease Calculator

Enter Vehicle price in dollars, Down payment amount and Trade-in value and the remaining scenario settings to review monthly lease payment with this tool. The residual is the assumed end-of-lease vehicle value.

Finance

Auto Loan Calculator

Enter Loan amount ($), Interest rate (%) and Loan term (years) to review monthly car payment with this tool. This form starts from loan principal, rather than computing a dealer purchase settlement.

Finance

Average Return Calculator

Enter Starting investment ($), Ending value ($) and Year 1 return (%) and the remaining scenario settings to review arithmetic average with this tool. An arithmetic mean describes the average listed percentage; it does not by itself reproduce growth in invested money.

Health

BAC Calculator

Enter Gender, Weight lbs and Age and the remaining scenario settings to review bac with this tool. The percentage is calculated from assumptions rather than a breath or blood measurement.

Health

Blood Pressure Calculator

Enter Systolic (top number), Diastolic (bottom number) and Age and the remaining scenario settings to review blood pressure category with this tool. The upper number reflects systolic pressure and the lower number diastolic pressure.

Health

BMI Calculator

Enter Height cm and Weight kg to review body mass index with this tool. BMI is a size-related screening measure.

Health

BMR Calculator

Enter Age, Gender and Height ft in — height Feet and the remaining scenario settings to review basal metabolic rate with this tool. BMR describes estimated energy needed for basic body functions at rest.

Finance

Boat Loan Calculator

Enter Boat Price ($), Down Payment (%) and Loan Amount ($) and the remaining scenario settings to review monthly payment with this tool. The payment covers the modeled principal and interest.

Health

Body Fat Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review body fat percentage with this tool. A circumference or other predictive estimate is not interchangeable with a laboratory body-composition measurement.

Health

Body Shape Calculator

Enter Gender, Shoulder circumference and Bust/Chest circumference and the remaining scenario settings to review body shape with this tool. The classification describes relationships among entered circumferences.

Health

Body Surface Area Calculator

Enter Height ft in — height Feet, Height ft in and Weight lbs and the remaining scenario settings to review body surface area with this tool. BSA is a modeled surface area.

Finance

Bond Calculator

Enter Face value ($), Purchase price ($) and Coupon rate (%) and the remaining scenario settings to review yield to maturity with this tool. The coupon rate is based on face value, whereas current yield uses market price.

Business

Break Even Calculator

Enter Fixed costs ($), Selling price per unit ($) and Variable cost per unit ($) to review break-even units with this tool. Each unit contributes selling price minus variable cost toward fixed expenses.

Finance

Budget Calculator

Enter Income Source, Amount ($) and Expense Category to review total income with this tool. The remaining amount is income minus the listed spending and allocations.

Finance

Business Loan Calculator

Enter Loan Amount ($), Annual Interest Rate (%) and Loan Term (Years) and the remaining scenario settings to review monthly payment with this tool. The loan payment is a financing outflow; it is not the same as profit, taxable income or the operating return from the financed asset.

Business

CAGR Calculator

Enter Initial value ($), Final value ($) and Number of years to review compound annual growth rate with this tool. CAGR smooths the path between two endpoints.

Health

Calorie Calculator

Enter Age, Gender and Height ft in — height Feet and the remaining scenario settings to review daily calorie goal with this tool. Maintenance calories approximate the intake that balances the modeled expenditure.

Health

Calorie Deficit Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily deficit with this tool. A daily deficit is expenditure minus intake under the selected assumptions.

Health

Calorie Surplus Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily surplus with this tool. The surplus is extra energy relative to the entered maintenance assumption.

Health

Calories Burned Calculator

Enter Weight lbs, Activity and Duration minutes to review total calories burned with this tool. The MET-based result is an estimate of energy expenditure for the chosen task.

Health

Carb Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily carbs target with this tool. A carbohydrate percentage is a share of energy, while grams are a mass.

Finance

Cash Back or Low Interest Calculator

Enter Purchase price ($), Down payment ($) and Loan term (months) and the remaining scenario settings to review savings with this tool. Cash back reduces the amount financed; a lower rate reduces interest on the financed balance.

Finance

CD Calculator

Enter Deposit amount ($), Interest rate (%) and Term (months) and the remaining scenario settings to review final cd balance with this tool. Maturity interest is the modeled amount earned over the deposit period.

Conversions

Celsius to Fahrenheit Converter

Enter Celsius (°C) and Fahrenheit (°F) to review fahrenheit with this tool. The result expresses the same temperature in Fahrenheit.

Health

Cholesterol Risk Calculator

Enter Total cholesterol (mg/dL), LDL cholesterol (mg/dL) and HDL cholesterol (mg/dL) and the remaining scenario settings to review total/hdl ratio with this tool. A cholesterol ratio or simplified category summarizes the entered lipid values.

Conversions

Centimeters to Feet Converter

Enter Centimeters (cm) and Feet (ft) to review feet with this tool. The result expresses the same measurement in feet.

Conversions

Centimeters to Inches Converter

Enter Centimeters (cm) and Inches (in) to review inches with this tool. The result expresses the same measurement in inches.

Finance

College Cost Calculator

Enter Annual Tuition ($), Annual Fees ($) and Room & Board ($) and the remaining scenario settings to review total 4-year cost with this tool. The first year uses the entered annual cost, and subsequent years increase at the selected inflation rate.

Business

Commission Calculator

Enter Total Sales Amount ($), Commission Type and Commission Rate (%) to review total commission with this tool. Commission is earned on the selected sales base.

Finance

Compound Interest Calculator

Enter Initial investment ($), Monthly contribution ($) and Annual return (%) and the remaining scenario settings to review final balance after investment period with this tool. The ending amount includes original capital, added money and compound growth.

Home

Concrete Calculator

Enter Length (ft), Width (ft) and Thickness (in) and the remaining scenario settings to review cubic yards with waste with this tool. Volume combines three dimensions, so a depth-entry mistake can materially change the order.

Health

Creatinine Clearance Calculator

Enter Age, Gender and Weight (lbs) and the remaining scenario settings to review creatinine clearance with this tool. The estimate is expressed as a clearance volume per minute.

Finance

Credit Card Calculator

Enter Current Balance ($), Annual Interest Rate (%) and Minimum Payment (%) and the remaining scenario settings to review total interest paid with this tool. Each payment first covers modeled interest; only the remainder reduces the balance.

Finance

Credit Cards Payoff Calculator

Enter Debt A balance ($), Debt A APR (%) and Debt A minimum payment ($) and the remaining scenario settings to review months with this tool. A highest-rate strategy prioritizes interest cost; a smallest-balance strategy prioritizes clearing accounts.

Conversions

Cups to Grams Calculator

Enter Cups and Ingredient to review conversion result with this tool. The same cup volume can have a different mass for flour, sugar or water.

Conversions

Cups to ML Calculator

Enter Cups (cup) and Milliliters (mL) to review ml with this tool. The result expresses the same measurement in milliliters.

Conversions

Cups to Ounces Calculator

Enter Cups (cup) and Fluid Ounces (fl oz) to review ounces with this tool. The result expresses the same measurement in U.S.

Finance

Currency Calculator

Enter Amount, From and To to review result with this tool. The converted amount uses a sample cross rate derived from the same USD-based snapshot.

Health

Daily Fiber Intake Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily fiber target with this tool. The output is a modeled intake reference, not a measurement of fiber currently eaten.

Finance

Debt Consolidation Calculator

Enter Name, Balance ($) and APR (%) and the remaining scenario settings to review consolidated with this tool. Consolidation changes the payment structure; it does not erase debt.

Finance

Debt Payoff Calculator

Enter Debt A balance ($), Debt A APR (%) and Debt A minimum payment ($) and the remaining scenario settings to review months with this tool. Minimums are funded first and extra money follows the chosen ordering.

Finance

Debt to Income Ratio Calculator

Enter Monthly gross income ($), Mortgage/Rent ($) and Car loans ($) and the remaining scenario settings to review back-end dti with this tool. The percentage uses gross income as its denominator.

Business

Depreciation Calculator

Enter Asset Cost $, Salvage Value $ and Useful Life (Years) and the remaining scenario settings to review straight-line annual depreciation with this tool. Depreciation is an allocation of cost, not a cash payment or necessarily a decline in market price.

Health

Diabetes Risk Calculator

Enter Age, Gender and Weight (lbs) and the remaining scenario settings to review bmi with this tool. A questionnaire score organizes selected risk factors.

Math

Discount Calculator

Enter Original Price ($), Discount Type and Discount Value to review sale price with this tool. A percentage discount applies to its price base.

Finance

Down Payment Calculator

Enter Home price ($), Down payment (%) and Interest rate (%) and the remaining scenario settings to review down payment required with this tool. The down payment reduces purchase financing, but it is not the entire cash needed at closing.

Health

Due Date Calculator

Enter Last menstrual period (LMP), Cycle length (days) and Method to review due date with this tool. The due date is a calendar estimate tied to an assumed gestational interval.

Conversions

Fahrenheit to Celsius Converter

Enter Fahrenheit (°F) and Celsius (°C) to review celsius with this tool. The result expresses the same temperature in Celsius.

Health

Fat Intake Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily fat target with this tool. Dietary fat contributes more modeled energy per gram than carbohydrate or protein.

Conversions

Feet and Inches to CM Calculator

Enter Feet (ft) and Inches (in) to review cm with this tool. The result expresses the same measurement in centimeters.

Conversions

Feet to CM Calculator

Enter Feet (ft) and Centimeters (cm) to review cm with this tool. The result expresses the same measurement in centimeters.

Conversions

Feet to Inches Calculator

Enter Feet (ft) and Inches (in) to review inches with this tool. The result expresses the same measurement in inches.

Conversions

Feet to Meters Calculator

Enter Feet (ft) and Meters (m) to review meters with this tool. The result expresses the same measurement in meters.

Finance

FHA Loan Calculator

Enter Home price ($), Down payment (%) and Interest rate (%) and the remaining scenario settings to review loan amount with this tool. Upfront and recurring insurance affect different parts of the estimate.

Finance

Finance Calculator

Enter Loan amount ($), Interest rate (%) and Loan term (months) and the remaining scenario settings to review payment per period with this tool. The recurring payment comes from the financed balance, periodic rate and number of payments.

Home

Flooring Calculator

Enter Length (ft), Width (ft) and Number of identical rooms and the remaining scenario settings to review material needed with this tool. Net floor area and material purchased differ because cuts and pack sizes can increase the order.

Finance

Future Value Calculator

Enter Present value ($), Interest rate (%) and Time period (years) and the remaining scenario settings to review future value with this tool. Future value is an amount at the end of the modeled horizon.

Conversions

Gallons to Liters Calculator

Enter Gallons (gal) and Liters (L) to review liters with this tool. The result expresses the same measurement in liters.

Health

Gestational Age Calculator

Enter Last menstrual period (LMP), Current date and Cycle length (days) and the remaining scenario settings to review gestational age with this tool. Weeks-and-days notation describes elapsed time, so 10 weeks and 4 days is not 10.4 decimal weeks.

Math

GPA Calculator

Enter Course 1 — Grade points, Course 1 — Credits and Course 2 — Grade points and the remaining scenario settings to review weighted gpa with this tool. A high-credit course contributes more to the result than a low-credit course.

Conversions

Grams to Cups Calculator

Enter Grams (g) and Ingredient to review conversion result with this tool. Dividing grams by the assumed grams per cup gives a volume quantity.

Conversions

Grams to Ounces Calculator

Enter Grams (g) and Ounces (oz) to review ounces with this tool. The result expresses the same quantity in avoirdupois ounces.

Health

Healthy Weight Calculator

Enter Age, Gender and Height ft in — height Feet and the remaining scenario settings to review bmi with this tool. A reference range describes the selected mathematical relationship.

Health

Heart Rate Calculator

Enter Age, Resting heart rate and Gender and the remaining scenario settings to review maximum heart rate with this tool. A zone boundary expresses a percentage or reserve-based share of an estimated maximum.

Finance

HELOC Calculator

Enter Current home value ($), Mortgage balance ($) and Credit limit ($) and the remaining scenario settings to review draw period payment with this tool. Interest-only payments do not reduce principal.

Finance

Home Equity Loan Calculator

Enter Current home value ($), Mortgage balance ($) and Interest rate (%) and the remaining scenario settings to review available home equity with this tool. An equity amount and a borrowing limit are different: a lender may allow financing only up to a share of property value after existing loans.

Finance

House Affordability Calculator

Enter Annual household income ($), Monthly debt payments ($) and Down payment ($) and the remaining scenario settings to review max monthly payment with this tool. The estimated purchase range is constrained by the entered monthly housing budget and financing assumptions.

Health

Ideal Weight Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review ideal weight with this tool. The figures are outputs of the selected equations, rather than personal health targets.

Conversions

Inches to Feet Calculator

Enter Inches (in) and Feet (ft) to review feet with this tool. The result expresses the same measurement in feet.

Conversions

Inches to Millimeters Converter

Enter Inches (in) and Millimeters (mm) to review mm with this tool. The result expresses the same measurement in millimeters.

Finance

Inflation Calculator

Enter Initial Amount ($), Start Year and End Year and the remaining scenario settings to review future value (nominal) with this tool. Compounded inflation raises the future amount required to buy an equivalent item.

Finance

Interest Calculator

Enter Principal amount ($), Interest rate (%) and Time period (years) and the remaining scenario settings to review total interest earned with this tool. Simple and compound methods use different treatment of previously earned interest.

Finance

Interest Rate Calculator

Enter Starting amount ($), Target amount ($) and Time period (years) and the remaining scenario settings to review required interest rate with this tool. The solved rate is a mathematical requirement under the contribution schedule, not an available product rate or an expected investment return.

Finance

Investment Calculator

Enter Initial investment ($), Monthly contribution ($) and Annual return (%) and the remaining scenario settings to review final balance with this tool. Deposits and growth are distinct sources of the ending balance.

Finance

IRA Calculator

Enter Current age, Retirement age and Current balance ($) and the remaining scenario settings to review roth ira with this tool. A pretax balance and an after-tax spendable amount are different.

Business

IRR Calculator

Enter Initial cash flow ($), Year 1 cash flow ($) and Year 2 cash flow ($) and the remaining scenario settings to review internal rate of return with this tool. IRR summarizes the timing pattern of the listed cash flows.

Conversions

Kilograms to Pounds Converter

Enter Kilograms (kg) and Pounds (lbs) to review lbs with this tool. The result expresses the same quantity in pounds.

Health

Kidney Function (eGFR) Calculator

Enter Age, Gender and Serum creatinine (mg/dL) to review e gfr with this tool. The estimate is indexed to 1.73 square meters of body surface area.

Conversions

Kilometers to Miles Converter

Enter Kilometers (km) and Miles (mi) to review miles with this tool. The result expresses the same measurement in statute miles.

Conversions

Pounds to Kilograms Converter

Enter Kilograms (kg) and Pounds (lbs) to review kg with this tool. The result expresses the same quantity in kilograms.

Health

Lean Body Mass Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review lean body mass with this tool. Lean body mass includes water, organs, bone and other non-fat components.

Finance

Lease Calculator

Enter Vehicle Price ($), Down Payment ($) and Residual Value (%) and the remaining scenario settings to review monthly lease payment with this tool. A lease payment reflects use and financing rather than full ownership of the asset.

Conversions

Liters to Gallons Calculator

Enter Liters (L) and Gallons (gal) to review gallons with this tool. The result expresses the same measurement in U.S.

Finance

Loan Calculator

Enter Loan amount ($), Interest rate (%) and Loan term (years) to review monthly payment with this tool. The amortizing payment covers both interest and principal.

Health

Macro Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily calories with this tool. Percentages describe calorie allocation, while grams describe mass.

Business

Margin Calculator

Enter Revenue $, Cost $ and Profit $ to review profit margin with this tool. Margin divides profit by selling price, whereas markup divides the same profit by cost.

Business

Markup Calculator

Enter Cost ($) and Markup (%) to review selling price with this tool. Markup is profit divided by cost.

Health

Maximum Heart Rate Calculator

Enter Age, Gender and Fitness level and the remaining scenario settings to review maximum heart rate with this tool. The primary estimate uses the stated Tanaka equation.

Conversions

Meters to Feet Calculator

Enter Meters (m) and Feet (ft) to review feet with this tool. The result expresses the same measurement in feet.

Conversions

Meters to Inches Calculator

Enter Meters (m) and Inches (in) to review inches with this tool. The result expresses the same measurement in inches.

Conversions

Miles to Kilometers Converter

Enter Miles (mi) and Kilometers (km) to review km with this tool. The result expresses the same measurement in kilometers.

Conversions

ML to Cups Calculator

Enter Milliliters (mL) and Cups (cup) to review cups with this tool. The result expresses the same measurement in U.S.

Conversions

Millimeters to Inches Converter

Enter Millimeters (mm) and Inches (in) to review inches with this tool. The result expresses the same measurement in inches.

Finance

Mortgage Calculator

Enter Home price ($), Down payment ($) and Interest rate (%) and the remaining scenario settings to review principal + interest with this tool. Principal and interest repay the loan; taxes, insurance and other entered charges add to the cash required each month.

Finance

Mortgage Payoff Calculator

Enter Current balance ($), Interest rate (%) and Remaining term (years) and the remaining scenario settings to review total interest saved with this tool. Additional principal reduces the balance used to calculate later interest.

Finance

Mutual Fund Calculator

Enter Investment type, Investment amount ($) and Expected return (%) and the remaining scenario settings to review final value with this tool. The projected balance represents a smooth assumed growth path.

Health

Navy Body Fat Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review body fat percentage with this tool. The formula uses relationships among body circumferences and height.

Health

One Rep Max Calculator

Enter Weight lifted lbs, Reps performed and Exercise and the remaining scenario settings to review bench press with this tool. The result predicts performance from a repetition set.

Conversions

Ounces to Cups Calculator

Enter Fluid Ounces (fl oz) and Cups (cup) to review cups with this tool. The result expresses the same measurement in U.S.

Conversions

Ounces to Grams Calculator

Enter Ounces (oz) and Grams (g) to review grams with this tool. The result expresses the same quantity in grams.

Conversions

Ounces to Pounds Calculator

Enter Ounces (oz) and Pounds (lbs) to review pounds with this tool. The result expresses the same quantity in pounds.

Health

Ovulation Calculator

Enter First day of last period, Average cycle length (days) and Luteal phase length (days) and the remaining scenario settings to review ovulation date with this tool. The estimated ovulation date and window follow assumptions about cycle timing.

Health

Pace Calculator

Enter Distance — distance, Distance and Time — hours and the remaining scenario settings to review pace with this tool. Pace is time per distance, while speed is distance per time.

Home

Paint Calculator

Enter Room length (ft), Room width (ft) and Wall height (ft) and the remaining scenario settings to review paint required with this tool. More coats increase the required amount; higher coverage per container reduces it.

Business

Payback Period Calculator

Enter Initial investment ($), Year 1 cash flow ($) and Year 2 cash flow ($) and the remaining scenario settings to review payback period with this tool. The fractional final year divides the unrecovered amount by that year’s inflow.

Finance

Payment Calculator

Enter Loan Amount ($), Interest Rate (%) and Loan Term (Years) to review monthly payment with this tool. A payment figure depends on the number of installments and interest per installment.

Finance

Pension Calculator

Enter Current age, Retirement age and Current pension balance ($) and the remaining scenario settings to review retirement balance with this tool. A modeled fund value is different from an employer’s promised pension benefit.

Math

Percentage Calculator

Enter Percentage (%), Number and Part and the remaining scenario settings to review percentage of number with this tool. The denominator defines the meaning of a percentage.

Finance

Personal Loan Calculator

Enter Loan Amount ($), Annual Interest Rate (%) and Loan Term (Years) to review monthly payment with this tool. The payment is based on the principal financed, which may differ from cash received if an origination fee is deducted.

Conversions

Pounds to Ounces Calculator

Enter Pounds (lbs) and Ounces (oz) to review ounces with this tool. The result expresses the same quantity in avoirdupois ounces.

Health

Pregnancy Calculator

Enter Last menstrual period (LMP), Cycle length (days) and Method to review due date with this tool. Calendar milestones are calculated from an assumed dating basis.

Health

Pregnancy Due Date Calculator

Enter Last menstrual period (LMP) and Calculation method to review due date with this tool. An estimated delivery date marks the model’s end of the gestational interval.

Health

Pregnancy Weight Gain Calculator

Enter Pre-pregnancy weight lbs, Height ft in — height Feet and Height ft in and the remaining scenario settings to review recommended weight gain with this tool. A plotted or calculated range is tied to the selected starting category and pregnancy assumptions.

Finance

Present Value Calculator

Enter Future value ($), Discount rate (%) and Time period (years) and the remaining scenario settings to review present value with this tool. A higher discount rate gives a lower present value for the same future amount.

Business

Profit Margin Calculator

Enter Revenue ($) and Cost ($) to review profit margin with this tool. Profit equals revenue minus the selected costs; margin divides that profit by revenue.

Health

Protein Calculator

Enter Weight lbs, Age and Gender and the remaining scenario settings to review daily protein target with this tool. The gram amount follows the chosen multiplier or calorie allocation.

Finance

Real Estate Calculator

Enter Purchase price ($), Down payment ($) and Closing costs ($) and the remaining scenario settings to review total roi with this tool. Equity is modeled property value minus the remaining loan; it is not entirely additional cash profit.

Finance

Refinance Calculator

Enter Current loan balance ($), Current interest rate (%) and Current remaining term (years) and the remaining scenario settings to review monthly savings with this tool. Lower payments can come from a lower rate or a longer remaining term.

Finance

Rent Calculator

Enter Annual income ($), Monthly debt payments ($) and Monthly rent ($) and the remaining scenario settings to review max rent with this tool. The result is a budget scenario rather than a landlord’s eligibility decision.

Finance

Rent vs Buy Calculator

Enter Home purchase price ($), Monthly rent ($) and Down payment (%) and the remaining scenario settings to review net financial difference with this tool. Mortgage principal builds modeled equity while interest and other ownership charges are expenses.

Finance

Rental Property Calculator

Enter Purchase price ($), Down payment (%) and Interest rate (%) and the remaining scenario settings to review total roi with this tool. Rent remaining after expenses and debt service is cash flow.

Finance

Repayment Calculator

Enter Loan Amount ($), Annual Interest Rate (%) and Loan Term to review monthly payment with this tool. The repayment result depends on whether you solve for payment or duration.

Finance

Retirement Calculator

Enter Current savings ($), Monthly contribution ($) and Annual return (%) and the remaining scenario settings to review projected retirement savings with this tool. The accumulated balance is a projection under the stated contribution timing.

Finance

RMD Calculator

Enter Current age, RMD starting age and Account balance ($) and the remaining scenario settings to review rmd this year with this tool. The modeled distribution divides the prior year-end balance by the selected distribution-period factor.

Business

ROI Calculator

Enter Investment cost ($), Return amount ($) and Time period (years) and the remaining scenario settings to review return on investment with this tool. ROI expresses net gain as a share of cost.

Home

Roofing Calculator

Enter Building length (ft), Building width (ft) and Roof rise per 12 in run and the remaining scenario settings to review roof area with waste with this tool. A pitched roof can have more surface area than its horizontal footprint.

Finance

Roth IRA Calculator

Enter Current age, Retirement age and Current balance ($) and the remaining scenario settings to review tax-free retirement balance with this tool. The result estimates account growth from entered deposits; it does not prove that those deposits are permitted or that a withdrawal will be qualified.

Health

Running Pace Calculator

Enter Distance — distance, Distance and Time — hours and the remaining scenario settings to review running pace with this tool. A projected finish time assumes the selected pace is maintained for the whole distance.

Business

Sales Tax Calculator

Enter Item Price $, Sales Tax Rate (%) and State to review total price (including tax) with this tool. Tax added to a net price and tax extracted from a tax-inclusive price use different relationships.

Finance

Savings Calculator

Enter Initial savings ($), Monthly deposit ($) and Interest rate (%) and the remaining scenario settings to review final savings balance with this tool. The final balance combines the starting deposit, new savings and estimated interest.

Finance

Simple Interest Calculator

Enter Principal amount ($), Interest rate (%) and Time period (years) and the remaining scenario settings to review total interest with this tool. Simple interest grows linearly with time when principal and rate stay fixed.

Health

Sleep Calculator

Enter Wake-up time, Bedtime and Calculate and the remaining scenario settings to review optimal bedtime with this tool. The suggested clock times come from arithmetic intervals.

Health

Sleep Cycle Calculator

Enter Wake-up time, Bedtime and Calculate and the remaining scenario settings to review optimal bedtime with this tool. Adding one modeled cycle shifts the suggested time by the assumed cycle duration.

Health

Smoking Cost Calculator

Enter Cigarettes per day, Price per pack ($) and Cigarettes per pack to review estimated yearly cost with this tool. The estimate counts modeled purchases over time.

Finance

Social Security Calculator

Enter Current age, Retirement age and Average annual income ($) and the remaining scenario settings to review estimated monthly benefit with this tool. The model applies its stated 2026 factors to an earnings approximation.

Health

Sodium Intake Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily sodium target with this tool. The result is a rule-based sodium amount, not a measurement of current dietary sodium or electrolyte balance.

Home

Square Footage Calculator

Enter Length (ft), Width (ft) and Quantity and the remaining scenario settings to review total area with this tool. Area is expressed in square units, while perimeter is a length.

Finance

Student Loan Calculator

Enter Total Loan Balance ($), Interest Rate (%) and Repayment Term (Years) to review monthly payment with this tool. A standard amortizing payment repays principal and interest over a fixed schedule.

Health

Sugar Intake Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily sugar limit with this tool. The displayed quantity is based on a calorie-share assumption.

Health

Target Heart Rate Calculator

Enter Age, Resting heart rate and Gender and the remaining scenario settings to review target heart rate zone with this tool. Reserve-based calculations subtract resting pulse from estimated maximum pulse before applying intensity.

Health

TDEE Calculator

Enter Age, Gender and Height ft in — height Feet and the remaining scenario settings to review total daily energy expenditure with this tool. TDEE represents an estimated whole-day energy requirement, whereas BMR describes a resting baseline.

Conversions

Unit Converter

Enter Measurement type, Value and From and the remaining scenario settings to review converted value with this tool. Multiplicative units use a scale factor, while temperature scales also need an offset.

Finance

VA Mortgage Calculator

Enter Home price ($), Down payment ($) and Interest rate (%) and the remaining scenario settings to review loan amount with this tool. A financed fee becomes part of principal and can increase both the payment and interest.

Business

VAT Calculator

Enter Amount €, Country / VAT Rate and VAT Rate (%) and the remaining scenario settings to review vat amount with this tool. For a gross amount, VAT is gross minus gross divided by one plus the decimal rate.

Health

VO₂ Max Calculator

Enter Gender, Age and Resting heart rate and the remaining scenario settings to review vo2 max with this tool. The HR-ratio and Rockport methods use different inputs and study assumptions.

Health

Waist to Hip Ratio Calculator

Enter Gender, Waist circumference and Hip circumference to review waist-to-hip ratio with this tool. The ratio is unitless because matching circumference units cancel.

Health

Walking Calorie Calculator

Enter Weight lbs, Distance — distance and Distance and the remaining scenario settings to review calories burned with this tool. Duration and the activity-intensity assumption both affect the estimate.

Health

Water Intake by Weight Calculator

Enter Weight lbs, Gender and Age and the remaining scenario settings to review daily water intake with this tool. The resulting volume is a rule-based planning figure, not a direct measurement of water loss or hydration.

Health

Water Intake Calculator

Enter Gender, Age and Weight lbs and the remaining scenario settings to review daily water intake with this tool. The output combines the selected baseline and adjustments.

Health

Weight Gain Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily surplus with this tool. The timeline follows a simplified energy-to-weight relationship.

Health

Weight Loss Calculator

Enter Gender, Age and Height ft in — height Feet and the remaining scenario settings to review daily deficit with this tool. The projected date is an arithmetic scenario, not a prediction.