Loan Calculator

Fixed-rate loan payment, total interest, total cost, and payoff time with optional extra payments.

Calculator Finance Updated Apr 20, 2026
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How to Use
  1. Enter loan amount, rate, and term.
  2. Add extra monthly payment to see payoff savings.
Input
Payment

Formula

Payment (PMT)
PMT = P · r(1+r)^n / ((1+r)^n − 1)
Zero interest
PMT = P / n

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