Loan Calculator

Calculate monthly payment and interest

Loan Details
FAQ
What's the difference between equal payment and equal principal?
Equal payment (annuity) keeps the monthly amount constant, easy to budget. Equal principal repays the same principal each month with interest on the balance, so payments start high and decrease. Equal principal costs less total interest.
How do I enter the interest rate?
Enter the annual rate as a percent. For 4.5%, enter 4.5. The tool converts it to a monthly rate automatically.
Will this match my actual loan?
Not exactly. This is a simple calculation that excludes prepayment fees, insurance, variable rates, and grace periods. Confirm actual terms with your lender.
Is my data saved?
No. All calculation happens in your browser; inputs are never stored or transmitted.
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About the Loan Calculator

The loan calculator computes your monthly payment, total interest, and total repayment from the principal, interest rate, and term. Supports both equal payment (annuity) and equal principal methods.

Key Features

Useful for mortgages, personal loans, and auto financing. This is a simple estimate, not financial advice; confirm actual terms with your lender.