Repayment Calculator
Term (months) = −log(1 − L×r/P) ÷ log(1+r)r=0.05/12=0.004167, months≈42
Free online tool
Repayment Calculator
Enter your loan amount, interest rate and monthly payment to find the payoff time.
Instant calculation
Repayment Calculator
Enter your loan amount, interest rate and monthly payment to find the payoff time.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter loan amount
Type the total loan balance.
- 02
Enter rate and payment
Provide the annual rate and your monthly payment amount.
- 03
See payoff time
Calculate to see months to full repayment.
The formula
How this calculation works
Finds the number of payments needed based on the monthly payment you can afford.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
$15,000 loan at 5% with $400/month — how long?
r=0.05/12=0.004167, months≈42≈ 42 months (3.5 years)Common questions
Questions about this calculation
What is the Repayment Calculator?
The Repayment Calculator helps you calculate how long it takes to repay a loan with fixed monthly payments. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Finds the number of payments needed based on the monthly payment you can afford.
Can you show an example?
Example: $15,000 loan at 5% with $400/month — how long? — ≈ 42 months (3.5 years).
Is my data saved when I use the Repayment Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Repayment Calculator free to use?
Yes. The Repayment Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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