Loan Interest Calculator
Estimate interest and total repayment for a fixed-rate installment loan.
Calculations run in this browser. Values are not submitted to the server.
Result
Formula and assumptions
Uses the standard monthly amortization formula for equal payments. Fees, variable rates, and lender-specific rounding are excluded.
Example values are shown in the input placeholders. Results use browser number precision unless the tool uses exact integer arithmetic. Check units and assumptions before using a result.