If you know your loan amount, term, and monthly payment but not the interest rate (common when a lender only advertises the payment), this calculator works backward to find the actual interest rate you're being charged — useful for comparing offers that are quoted differently.
Example: a $32,000 loan paid off over 3 years with a $960 monthly payment implies a specific interest rate — this tool solves for exactly what that rate is.
Interest rate is the amount charged by lenders to borrowers for the use of money, expressed as a percentage of the principal, or original amount borrowed.
This calculator works backward from a known loan amount, term, and monthly payment to determine the nominal annual interest rate being charged — useful for verifying dealer or lender financing offers where the rate itself is not disclosed.
It determines the real interest rate on loans with fixed terms and monthly payments.
It is useful in situations where car dealers only provide monthly payment information and total price without including the actual rate on the car loan.
Interest rate is the amount charged by lenders to borrowers for the use of money, expressed as a percentage of the principal, or original amount borrowed.
It works backward from a known loan amount, term, and monthly payment to determine the nominal annual interest rate being charged.
It includes an amortization graph and payment breakdown alongside the calculated interest rate.