Loan calculator
Estimate fixed monthly principal-and-interest payments and download an amortization schedule.
Use the selected decimal separator and no thousands separators. Amounts: 0–1e12. Interest: 0–100%. Duration: 1–1200 whole months. Results round to two decimal places; calculations retain full floating-point precision.
Illustrative calculations, not personal financial advice. Constant user-entered rates; no taxes, fees, market data or guarantees.
Calculated on your device. Financial entries are not uploaded or saved.
Calculation schedule
Table values are rounded for display. CSV contains every row; displayed rounded rows may not sum exactly.
Formula and worked example
For principal P, monthly rate r and n payments, payment = P × r ÷ (1 − (1+r)^−n). At zero interest, payment = P ÷ n. A 10000 loan at 6% nominal annual interest over 12 months has a principal-and-interest payment of about 860.66.
Questions and assumptions
What is excluded from the loan estimate?
This is a fixed-rate, fully amortizing loan with payments at month end and monthly interest at annual rate ÷ 12. It excludes origination fees, insurance, taxes, variable rates, extra payments and lender-specific day counts. Enter the contractual nominal rate, not a fee-inclusive APR. The schedule uses unrounded values; actual cent-rounded payments and final adjustments can differ.