Student Loan Calculator
Calculate monthly student loan payments and total interest cost.
This student loan calculator (also useful as an education loan calculator) estimates your monthly payment and total interest cost over the life of a federal or private student loan repayment plan. It uses the same amortization math as any fixed-rate installment loan.
Enter your loan balance, interest rate, and repayment term, and the calculator returns your monthly payment and total interest.
Worked Calculation Examples
| Scenario | Result | Calculation Step |
|---|---|---|
| $30,000 balance, 5.5% rate, standard 10-year term | $325.53/month | r = 0.055/12 = 0.0045833, n = 120. Payment ≈ $325.53/month. |
| Same $30,000 balance and rate, extended to a 20-year term | $206.36/month | r = 0.0045833, n = 240. Payment drops to ≈ $206.36/month - lower monthly cost, but interest accrues over twice as many months, raising total interest paid over the life of the loan. |
How Student Loan Payments Are Calculated
Like a mortgage or auto loan, a standard student loan repayment plan uses amortization: a fixed monthly payment split between principal and interest, with the interest portion shrinking and the principal portion growing over the term. Federal loans typically default to a 10-year standard repayment term, though extended and income-driven plans change the math significantly.
Why a Longer Term Lowers the Payment but Raises the Cost
Extending a student loan repayment calculator scenario to 20 or 25 years lowers the monthly payment substantially compared to the standard 10-year term, but increases total interest paid over the life of the loan, since interest accrues for a longer period on a slower-shrinking balance.
How to Use the Student Loan Calculator
- Open the Student Loan Calculator and enter the values requested in the input fields.
- Check the units, percentages, dates, or time periods before reading the answer.
- Review the instant result and adjust any value to compare another scenario.
- Use the formula, example, and FAQs below to understand how the student loan calculator works.
Frequently Asked Questions
How do I calculate my monthly student loan payment?
Apply the standard loan amortization formula using your balance, interest rate, and repayment term in months - this calculator does that math automatically.
What is the standard student loan repayment term?
Federal student loans typically default to a 10-year standard repayment plan, though extended plans up to 25 years and income-driven plans with different terms are also available.
Does a longer loan term save money overall?
No - a longer term lowers the monthly payment but increases total interest paid, since interest keeps accruing on the outstanding balance for a longer period of time.
How do I use this student loan calculator?
Enter the known values, review the units or settings, and the calculator updates the result instantly. The formula and example on this page show how the answer is produced.
What does the Student Loan Calculator calculate?
Calculate monthly student loan payments and total interest cost. It is designed for fast browser-based calculations without sign-up, downloads, or manual spreadsheet setup.
What formula does this student loan use?
The formula is: M = P × [r(1+r)ⁿ] ÷ [(1+r)ⁿ − 1]. This is the same amortization formula used for any fixed-rate installment loan, applied here to education debt. The US federal student loan program in its modern form dates to the Higher Education Act of 1965, which established government-backed loans specifically to expand college access; the standard 10-year repayment term used in the formula's n value reflects the default federal repayment plan, though income-driven and extended plans use different, often longer, terms.
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Last updated: September 27, 2026.