Quiet Zeros

Calculators / Home & loans

Loan calculator

Auto, personal, student — any fixed-rate loan. See the payment, what the interest really adds up to, and the payoff schedule. Nothing you type leaves this page.

$

Enter an amount between $100 and $5,000,000.

%

Auto loans often run 5–10%; personal loans 8–20%.

Enter a rate between 0 and 40%.

years

Enter a term between 6 months and 40 years.

Monthly payment

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What you'll pay back, in total

Total interest

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Total paid

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Payments

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Principal vs. interest paid, year by year

Amortization schedule (yearly)

How this is calculated

Fixed-rate loans use the same amortization formula as a mortgage:

M = P × [ i (1 + i)ⁿ ] / [ (1 + i)ⁿ − 1 ]  — P is the amount borrowed, i the monthly rate (APR ÷ 12), n the number of payments.

Every payment is the same size, but its makeup shifts: interest is charged on the remaining balance, so early payments are interest-heavy and the last ones are nearly all principal.

Reading the total

The stacked bar shows the loan the way lenders rarely present it: the amount you borrowed next to the interest you'll hand over. On a long term, interest can rival the principal — shortening the term or paying extra principal (see the debt payoff tool) are the two levers that shrink it.

Notes

This assumes a simple amortizing loan with no fees, no compounding tricks, and payments made on time. Origination fees and precomputed-interest loans will differ — check the loan agreement's APR and total-of-payments disclosure.

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