LoanMath

Simple Interest Loan Calculator

Interest that does not compound.

Your figures stay on your computer — no server, no tracking, no registration
$
%
yr

Try: Principal=5000, APR=10, Time=2 → $5,000, 10%, 2, $1,000, $6,000

How to use

Simple interest is charged only on the original principal, not on accrued interest. Common for short-term and some auto loans.

Formula

Interest = principal × rate × time.

FAQ

Simple vs amortizing?

Amortizing loans also charge simple interest per period but recalculate on the falling balance.

Precompute the total?

Multiply principal × rate × years for the full interest.

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