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.

✏️ Enter your loan details

📋 Full amortization schedule

# Date Payment Principal Interest Balance
📊

Click "Generate schedule" to see your full amortization table

💰 Your loan summary

Monthly payment $0.00
Loan amount $0
Total interest $0
Total cost $0
0
Total payments
-
Payoff date

⚖️ 15-Year vs 30-Year

Compare monthly payments and total interest

🏠 15-Year mortgage $0/mo
Higher payment, save $100k+ in interest
🏠 30-Year mortgage $0/mo
Lower payment, more interest over time

Formula Used

Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
P = principal, r = periodic interest rate, n = number of payments.

How the formula is applied

The calculation links Loan amount ($), Interest rate (%) and Loan term (years) to monthly payment. Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Early payments usually contain a larger interest share.

Calculator Description

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.

See how a fixed-payment loan balance declines and how each payment is split between interest and principal. Use the schedule to inspect the balance at a future month.

Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Early payments usually contain a larger interest share.

Frequently Asked Questions

What information do I need for the Amortization Calculator?

Prepare Loan amount ($), Interest rate (%), Loan term (years) and Start date. Set the principal, annual rate and term, then read one early row and one later row of the repayment schedule.

Why does the interest share change during repayment?

Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Early payments usually contain a larger interest share. A monthly schedule can differ from daily-interest servicing, payment-date adjustments, fees and lender rounding. It is not a payoff quote.

How can I check the amortization calculator with an example?

Use the full settings in the worked-example table. They produce Monthly payment: 1264.14. Compare the method and units as well as the displayed number.

Which assumptions apply to this amortization calculator?

The displayed relationship is Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1] P = principal, r = periodic interest rate, n = number of payments. Set the principal, annual rate and term, then read one early row and one later row of the repayment schedule.

When should I verify the amortization calculator result elsewhere?

A monthly schedule can differ from daily-interest servicing, payment-date adjustments, fees and lender rounding. It is not a payoff quote. For a transaction or account decision, compare the inputs with the applicable statement, contract or official rules.

How to Use This Calculator

  1. Set the principal, annual rate and term, then read one early row and one later row of the repayment schedule.
  2. Fill in Loan amount ($), Interest rate (%), Loan term (years) and Start date. Use the field units rather than copying an unlabeled value.
  3. For a result check, reproduce the example beginning with Loan amount ($) = 200000 and Interest rate (%) = 6.5; copy the remaining settings from the detailed guide.
  4. Use the page's Calculate or Convert control, or read the updated result where the tool recalculates automatically. Locate Monthly payment and any supporting breakdown.
  5. Interpret the result with this distinction in mind: Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Keep the selected inputs alongside the output when comparing scenarios.

Practical example and result check

Worked amortization calculator example. Set Loan amount ($) = 200000; Interest rate (%) = 6.5; Loan term (years) = 30; Start date = 2024-01-01. The corresponding output is Monthly payment: 1264.14. Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant.

Before relying on the result

  • Confirm the units, dates, rates and time periods entered.
  • Review which costs, measurements or assumptions are included and excluded.
  • Change one important input at a time to understand the result sensitivity.

Detailed Calculator Guide

Choose the right question for Amortization Calculator

See how a fixed-payment loan balance declines and how each payment is split between interest and principal. Use the schedule to inspect the balance at a future month.

Prepare the inputs

Set the principal, annual rate and term, then read one early row and one later row of the repayment schedule.

Amortization Calculator: worked input settings
FieldExample valueEntry check
Loan amount ($)200000Use the amount for this scenario in the currency and period shown by the field.
Interest rate (%)6.5Enter a percentage in the form requested by the field, keeping its stated time basis.
Loan term (years)30Use the period unit in the field label; months and years are not interchangeable.
Start date2024-01-01Use the calendar date for this scenario; keep the comparison date explicit.

Follow the calculation

Relationship used for this example: Monthly payment = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1] P = principal, r = periodic interest rate, n = number of payments.

Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Early payments usually contain a larger interest share.

Read the worked result

Results for the worked settings
OutputDisplayed result
Monthly payment1264.14

With these settings, monthly payment is 1264.14. Use the same units and calculation mode when reproducing this example.

Why does the interest share change during repayment?

Interest is calculated on the remaining balance, so the split changes even when the scheduled payment stays constant. Early payments usually contain a larger interest share. A monthly schedule can differ from daily-interest servicing, payment-date adjustments, fees and lender rounding. It is not a payoff quote.

Apply the result to your own scenario

Replace the illustrative loan amount ($) value (200000) with your own value, then complete the other inputs for the same scenario. Set the principal, annual rate and term, then read one early row and one later row of the repayment schedule.

Sources and method notes

Supporting Guides