Free Online Tool
Loan Interest Calculator
Compare estimated payments for amortized, equal principal, and interest-only loans.
The result will appear here.
How to Use
- Enter loan amount, annual rate, and term.
- Choose a repayment type.
- Review monthly payment and total interest.
Examples
- 30,000,000 at 5% for 36 months
- Check monthly interest for an interest-only loan
Calculation and Conversion Notes
Amortized repayment is calculated as a fixed monthly payment. Equal principal repayment pays the same principal amount each month and calculates interest on the remaining balance. Interest-only repayment is a simple estimate where monthly interest is paid and the principal is repaid at maturity. Actual loan terms, fees, and lender rules can change the result.
FAQ
Does Loan Interest Calculator save my input?
No. Your input is not stored on a server. Supported actions run in your browser.
Can I use it on mobile?
Yes. The pages are responsive and work on desktop and mobile browsers.
Can I rely on the result?
Use the result as a quick reference. Important work should be checked separately.