Save time and avoid math errors with our Student Loan Payoff Calculator. Calculate how long to pay off student loans with extra payments. Fast, free, an...
Formula
const r = inputs.rate / 100 / 12; const p = inputs.payment + inputs.extra; const months = Math.ceil(-Math.log(1 - (inputs.balance * r) / p) / Math.log(1 + r)); const traditionalMonths = Math.ceil(-Math.log(1 - (inputs.balance * r) / inputs.payment) / Math.log(1 + r)); const totalCostExtra = p * months; const totalCostReg = inputs.payment * traditionalMonths; return { months, totalInterest: Math.round(totalCostReg - totalCostExtra) };Loan Balance ($)
30,000
Interest Rate (%)
5
Current Payment ($)
300
Extra Monthly ($)
50
Use the result to compare providers, request quotes, or send the scenario to a specialist when the numbers matter.
Student Loan Payoff Calculator estimates Months to Payoff, Total Interest Savings from Loan Balance ($), Interest Rate (%), Current Payment ($), Extra Monthly ($). Use it to compare scenarios and understand which inputs drive the biggest changes. Results are directional estimates — verify with current, authoritative sources before making financial, legal, or health decisions.
Use this finance calculator to compare scenarios before committing money, time, or a provider conversation.
The estimate combines Loan Balance ($), Interest Rate (%), Current Payment ($) and returns Months to Payoff, Total Interest Savings.
If the result changes your decision, verify the current quote, rate, eligibility rule, or provider term before acting.
Founding provider slot
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This calculator provides estimates based on the inputs provided. It does not constitute financial advice, investment recommendations, or tax guidance. Past performance does not guarantee future results. Consult a qualified financial advisor, accountant, or tax professional before making financial decisions.
Reviewed by the CalculateThis.ai editorial team. Updates: check back for latest parameters. Tools are for estimation only — verify with current provider terms.