Loan Interest Calculator
Estimate monthly payment and total interest from amount, rate, and term.
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Estimate monthly loan payments and interest
Loan Interest Calculator estimates monthly payments and total interest from principal, rate, term, and repayment style. It helps compare mortgage, personal loan, and installment scenarios before speaking with a lender.
Useful For
- Compare repayment methods
- See how interest rate changes affect monthly payment
- Estimate total interest over the full term
Good To Know
Final loan terms may include fees, promotional rates, early repayment rules, and lender-specific policies.
Before You Rely On It
Tax rates, fees, exchange rates, and insurance rules can change by date and provider. Treat results as planning estimates and verify official sources before filing, signing, or paying.
Review Date And Limits
Rates and policies can change, so results are estimates for planning. Check official sources before filing, signing, or paying. Reviewed on Jul 2, 2026.
Checks before estimating loan payments
Loan terms
- Enter principal, term, and rate on the same basis
- Separate amortized, equal principal, and bullet repayment methods
Compare cost
- Review total interest and total repayment, not only monthly payment
- Consider early repayment fees, guarantees, and other charges
Before signing
- Confirm actual lender rates and discount conditions
- For variable rates, compare higher-rate scenarios too
Equal payment keeps the monthly total steadier, while equal principal repays the same principal each month and usually starts higher but lowers total interest.
The base estimate uses amount, rate, and term. Check prepayment fees, guarantee fees, stamp tax, and promotional rate rules separately.
Custom amounts are not written into shared URLs. Example links store only the selected example.