Loans & mortgages · NUMORA
Loan Calculator
You know the amount, rate and term. First the monthly payment — then what extra principal saves.
Open interactive calculatorHow to use
Amortizing loan with optional extra principal.
Formula
PMT = P × r(1+r)^n / ((1+r)^n − 1)
FAQ
Is this Loan calculator accurate?
The formula and assumptions are shown on the page, and the engine is covered by audit tests. Results are for reference — not financial or medical advice.
Do I need an account?
No. Calculations run in your browser. Recents can stay on this device.
What inputs do I need?
Amortizing loan with optional extra principal.
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