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Student Loan Calculator

Monthly payment and total interest for federal and private student loans.

Work out monthly payments and total interest on student loans under standard repayment — with optional extra payments to see how much faster you can be debt-free.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

$
%
years
$

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

Standard amortizing-loan math: M = P · r / (1 − (1 + r)−n). Extra monthly payments reduce the principal each month and shorten the payoff period.

In depth

Work out monthly payments and total interest on student loans under standard repayment — with optional extra payments to see how much faster you can be debt-free.

Frequently asked questions

No. IDR plans recalculate payments each year based on income and family size. This tool is for standard repayment, which is the most common starting point.