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Loan & Mortgage Calculators

Loan Repayment Calculator

See how long it takes to repay a loan with a fixed monthly payment you choose, and the total interest you’ll pay.

Enter values

Results update as you type.

Result

Time to repay

4 yr 0 mo

Total interest
$3,867.75
Total paid
$23,867.75

Amortization schedule (yearly)

PeriodPrincipal paidInterest paidBalance
Year 14,377.661,622.3415,622.34
Year 24,788.311,211.6910,834.04
Year 35,237.49762.515,596.55
Year 45,596.55271.20

About the Loan Repayment Calculator

See how long it takes to repay a loan with a fixed monthly payment you choose, and the total interest you’ll pay.

Also known as: how long to pay off loan, repayment period, loan payoff time.

How to use this calculator

  1. Enter loan balance, interest rate, monthly payment.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

n = −ln(1 − rB/P) / ln(1 + r)

Worked example

Using the values pre-filled in the calculator above:

  • Loan balance = 20,000
  • Interest rate = 9 %
  • Monthly payment = 500

the calculator returns:

  • Time to repay: 4 yr 0 mo
  • Total interest: 3,867.75
  • Total paid: 23,867.75