UltimateTools
Money & Finance

How to Use the Student Loan Calculator

Enter your student loan balance, interest rate, and repayment term — the calculator shows the fixed monthly payment and total interest paid over that term, and running it again with a different term lets you compare the payment-versus-total-cost trade-off directly.

The Student Loan Calculator uses the standard amortization formula — here's what to enter and how to compare repayment options.

Entering loan details

Enter the current balance, interest rate, and term to see the standard monthly payment — for multiple loans with different rates, running each separately (or using a weighted average rate across all loans) gives the most accurate combined picture.

Comparing repayment terms

Running the same balance and rate at a couple of different term lengths shows the direct trade-off between monthly payment and total interest, making it easier to weigh a standard term against a longer, income-driven-style timeline for the specific numbers involved.

Frequently asked questions

Does this calculator model income-driven repayment specifically?

It calculates a standard fixed-payment amortization — for an income-driven plan's payment (based on income and family size rather than a fixed formula), checking directly with the loan servicer or the official federal loan simulator gives the most accurate plan-specific figure.

How do I combine multiple student loans with different rates?

Calculating a weighted average interest rate (weighting each loan's rate by its balance) and entering the combined balance and that weighted rate gives a reasonable combined estimate, though running each loan separately is more precise if the loans have very different terms remaining.