Quick guide
How to use this calculator
- Enter all amounts in one consistent currency.
- Enter annual percentage rates and whole-month counts exactly as labelled.
- Review the result together with the stated assumptions and exclusions.
Calculation method
Calculation method
Payment = P·r/(1−(1+r)^−n), where r is the nominal annual rate divided by 12; total cost includes separately entered fees.
The calculator keeps full binary floating-point precision through the calculation and rounds only for display. It rejects non-amortizing payments, invalid rates, and schedules beyond the disclosed work limits.
Worked example
Practical example
Compare different annual rate, term, and fee combinations for the same amount borrowed.
Payment = P·r/(1−(1+r)^−n), where r is the nominal annual rate divided by 12; total cost includes separately entered fees.
Supported inputs
Precision and limits
Visible input limits
Numeric tokens accept at most 60 characters. Amounts are capped at 1e12 and annual rates at 1000%. Repayment terms are whole months up to 1200; grace, promotional, and lease periods are whole months up to 120.
Estimate, not an offer
Results model only the values entered. Lenders may use different compounding, day counts, fees, payment allocation, or rounding.
International scope
No country, tax system, government benefit, regulated disclosure, or currency is assumed. Enter one consistent currency and verify local terms separately.
Calculator-specific assumptions
Rates are nominal annual rates divided by 12, not regulated or effective APRs. Do not enter a fee separately if it is already incorporated into the rate you are comparing.