Result
How to use this calculator
Enter the loan amount, annual interest rate, and amortization period in years. The calculator returns the monthly principal-and-interest payment, total interest over the term, and the implied total of payments.
The formula
M = L × r(1+r)^n ÷ ((1+r)^n − 1), with L = loan amount, r = annual rate ÷ 12, and n = years × 12 payments.
Commercial loans run shorter than you think
Many commercial mortgages amortize over 20–30 years but mature in 5–10 years with a balloon payment. Check your loan's balloon terms — this calculator shows the amortized payment, not the balloon amount.