Compound Interest Calculator

See how your money grows over time with the power of compounding.

Initial Principal ($)

Monthly Contribution ($)

Annual Interest Rate (%)

Years

Compounding Frequency

Future Value

Total Interest

Total Contributions

Growth Multiple

Year-by-Year Breakdown

Year	Contributions	Interest	Balance

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The Compound Interest Formula

A = P(1 + r/n)^(nt), where P = principal, r = annual rate, n = compounding frequency, t = years. With monthly contributions C, the future value of the annuity is C x [((1+r/n)^(nt) - 1) / (r/n)]. The total is the sum of both. Built by Groundwork Analytics.