Lending Rate Calculator
Compute periodic loan payments and total interest cost over the loan term.
About this calculator
What is a lending rate?
The lending rate (interest rate on a loan) determines your periodic payment and total cost of borrowing. Mortgages, auto loans, and personal loans typically use amortization: each payment covers interest and principal.
This calculator assumes a fixed rate for the full term with equal periodic payments.
Payment = P × [r(1+r)^n] ÷ [(1+r)^n − 1]
Reference tables & standards
CFPB loan cost factors
Source: U.S. Consumer Financial Protection Bureau (CFPB)| Term | Definition |
|---|---|
| Interest rate | Cost of borrowing the principal, expressed as a percentage |
| APR | Includes interest plus certain fees — broader cost measure |
| Amortization | Gradual repayment of principal over the loan term |
| Total interest | Sum of all interest paid over the life of the loan |
Calculations are for educational and planning purposes only. They are not financial, tax, or investment advice. Rates, fees, and inflation assumptions vary in real markets.