Loan & Interest Calculator
Free and private — calculations run in this browser; settings are saved on this device in this browser.
Loan details
Monthly payment
Monthly payment
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Total paid
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Total interest
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Standard amortization formula with monthly compounding. At 0% the payment is simply principal ÷ number of months. See the amortization schedule for the full breakdown.
Extra payments
Uses the loan from the Loan payment tab.
Payoff summary
Paid off in
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Total interest
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Time saved
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vs. no extra payment
Interest saved
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vs. no extra payment
Principal vs. interest per payment
Principal part
Interest part
Schedule by year
Savings details
Result
Final balance
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Total contributed
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Interest earned
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Contributions are added at the end of each month; interest is credited at the selected compounding frequency.
Growth by year
Contributed
Interest earned
| Year | Contributed | Interest earned | Balance |
|---|
Simple interest
Result
Interest
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Total (principal + interest)
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Simple interest: I = P × r × t (no compounding).