Loan Calculator
Calculate monthly loan payments, total interest and a yearly amortization summary.
Payment and amortization formula
An amortizing loan repays principal over time. For principal P, monthly rate i = annual rate / 12 and n monthly payments, payment = P × i / (1 − (1 + i)^−n). At zero interest the payment is P/n. Rates entered as percentages are divided by 100. The table groups principal and interest paid by year.
Assumptions and example
Equal payments occur at month-end. A 10,000 loan at 0% for 10 months costs 1,000 per month and 10,000 in total. Fees are excluded. Calculations retain precision internally; lender rounding and contract terms may differ.