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Finance Calculators

Compound Interest Calculator

Calculate how an investment grows over time when interest compounds at regular intervals.

%
Future value
Interest earned
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About the Compound Interest Calculator

Compound interest is interest earned not only on your original principal, but also on the interest that has already accumulated — causing your balance to grow faster the longer it's invested.

Formula: A = P(1 + r/n)nt, where P is principal, r is annual rate, n is compounding periods per year, and t is years.

More frequent compounding (daily vs. annually) produces slightly higher returns for the same nominal rate, because interest starts earning interest sooner.

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