Student Loan Calculator
Project how much student debt you will carry at graduation — including interest that accrues while you are still in school and during the grace period — then see the monthly repayment, total interest and full amortization. Compare subsidized loans (no interest during school) against unsubsidized ones.
TheCalculators — Student Loan Calculator
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Monthly Repayment
$357.15
$31,035 balance at repayment · $30,000 total borrowed · 10-yr term
- Amount Borrowed
- $30,000.00
- Balance When Repayment Starts
- $31,034.56
- Interest Accrued in School/Grace
- $1,034.56
- Total Interest
- $11,823.05
- Total of Payments
- $42,858
- Interest as % of Borrowed
- 39.4%
Total repayment breakdown
- Principal$31,035
- Interest$11,823
Amortization schedule (annual)
Unsubsidized loans accrue interest from the day they disburse — including all four (or more) school years and the grace period. Paying that interest as it accrues can save thousands by graduation day.
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Formula
Unsubsidized: B ← B·(1+r) each month in school/grace; Payment = P·r(1+r)^n / ((1+r)^n − 1)
Pro tips
- • Federal Direct loans typically carry 6-month grace periods before the first payment is due.
- • Paying interest during school on unsubsidized loans prevents capitalization — interest never earns interest.
- • Income-driven repayment (SAVE, PAYE) can cap payments at 10–20% of discretionary income.
FAQ
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