By CalculatorInn Team · Updated: 2026-03-22 · Free & accurate · Instant results
Estimate your monthly student loan payment and total repayment cost based on loan balance, interest rate, and repayment term.
Interactive Student Loan Calculator
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Payment = P × r × (1+r)^n / ((1+r)^n − 1)
Standard amortization formula where P is loan balance, r is monthly rate, n is total months. Extra payments reduce principal faster, decreasing total interest.
Federal student loan rates for 2025-2026 are around 5.5% for undergraduate loans and 7-8% for graduate and PLUS loans. Private loans vary from 4-14% based on credit.
Every extra dollar goes directly to principal, reducing total interest. Even $50-100 extra per month can save thousands and years off your repayment.
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