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Compound Interest Calculator — Free Online Calculator

Calculates investment growth with compound interest over time.

What is it?

The compound interest calculator applies the standard formula P·(1+r/n)^(n·t) to show how an investment or debt grows when interest is earned on previously accumulated interest.

Formula

A = P × (1 + r/n)^(n·t) Interest earned = A − P

Example

$5,000 at 6% compounded quarterly for 10 years: A = 5000 × (1 + 0.06/4)^(40) = 5000 × 1.8140 ≈ $9,070. Interest earned ≈ $4,070.

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