Loan Calculator guide
Estimate the monthly payment, total repayment, and total interest for a fixed-rate installment loan.
What this tool does
The loan calculator uses the standard amortized-payment formula with the principal, monthly interest rate, and total number of monthly payments. It assumes the annual rate remains fixed and the same payment is made every month for the full term. A zero-interest loan is handled separately by dividing principal evenly across all payments.
The currency choice changes only the display symbol; it does not perform exchange-rate conversion. The estimate does not include taxes, insurance, origination fees, late charges, balloon payments, changing rates, or other lender-specific costs.
How to use it
- Choose the display currency.
- Enter the amount you plan to borrow.
- Enter the annual interest rate.
- Enter the repayment term in years.
- Select Calculate payment.
Review the estimated monthly payment alongside the total interest and total repayment. Try different rates or terms to understand how they affect the cost.
Benefits
- Handles standard fixed-rate monthly repayment calculations
- Correctly supports zero-interest loans
- Shows both monthly and lifetime borrowing costs
- Runs privately without saving financial inputs
Understanding the payment
Monthly payment is the mathematical amount needed to reduce the balance to zero over the selected term under the stated assumptions. Total repayment is the monthly amount multiplied by the number of payments, while total interest is the difference between that total and the amount borrowed. Small differences from a lender schedule can result from payment-date rules, daily interest, or rounding.
Use comparisons to understand tradeoffs: a longer term can lower the monthly payment while increasing lifetime interest, and a lower rate can reduce both. The tool does not assess affordability, eligibility, credit risk, or the suitability of a loan.
Financial notice: This calculator provides an educational estimate, not a quote, approval, or financial recommendation. Review official disclosures and repayment schedules from a regulated lender before making a borrowing decision.