Formula
Payment = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is principal, r is the monthly rate and n is the number of payments.
Compute monthly debt service, total finance interest, and interest-to-principal ratio for equipment financing.
Estimate commercial loan payments, total interest and repayment cost from loan terms.
Payment = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is principal, r is the monthly rate and n is the number of payments.
The calculator converts the annual nominal rate to a monthly rate and solves the standard fixed-payment amortization formula. It then separates total repayment into principal and interest.