Principal from Monthly Payment
MONEY & BUSINESS
Principal from Monthly Payment
Calculate the principal corresponding to a payment, term and nominal rate.
UNDERSTAND YOUR RESULT
How it works
Calculate the principal corresponding to a payment, term and nominal rate.
THE CALCULATIONprincipal = payment × (1−(1+r)^−n) / r
Using this calculator
Enter monthly payment, annual nominal rate (%), months. principal = payment × (1−(1+r)^−n) / r.
What to keep in mind
Uses the amounts and rates you enter. No live prices, tax rules, lender fees or individualized financial advice are included. Keep currency and accounting periods consistent.
Sources & further reading
CFPB · Understanding amortization ↗Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.