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Loan payment calculator

Calculate monthly loan payment, total interest, and an amortization schedule.

Input and settings

How to use

Calculate monthly loan payment, total interest, and an amortization schedule.

Enter or paste the source data.
Adjust only the options you need.
Run the tool, verify the result, then copy or download it.

What to know before using it

Equal-payment and equal-principal schedules can produce different initial payments and total interest. Use the full schedule and balance chart to understand the whole term.

Common failure points

Real loans may include fees, insurance, variable rates and prepayment rules.
Treat this as an estimate; the lender’s official schedule takes precedence.
Extra payments should be considered alongside liquidity and other debt.

Practical example

Compare a baseline loan with a fixed monthly extra payment to see changes in payoff date and total interest.