What is compound interest?

Compound interest earns interest on both principal and previously earned interest, growing exponentially.

What compounding frequencies are available?

Daily, monthly, quarterly, semi-annually, and annually.

Yes, add monthly or annual contributions to model regular savings.

A = P(1 + r/n)^(nt), where P=principal, r=rate, n=frequency, t=time.

More frequent compounding results in slightly higher returns. Daily vs. annual makes a small but real difference.

with contributions

Calculate compound interest growth over time. See how your investment grows with regular contributions.

Principal ($)

Annual interest rate (%)

Time period (years)

Monthly contribution ($)

Compounding frequency

Future value

$19,671.51

Total contributions

$10,000.00

Total interest earned

$9,671.51

Enter your initial investment amount.

Enter annual interest rate, years, and compounding frequency.

See total value, interest earned, and year-by-year breakdown.

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