Compound Interest Calculator

See how your money grows over time with compound interest and regular contributions.

Initial Principal ($)

Annual Interest Rate (%)

Time Period (years)

Compound Frequency

Monthly Contribution ($) optional

Future Value

$20,097

Total Contributed

$10,000

Interest Earned

$10,097

How it works

Formula: A = P(1 + r/n)^(nt) where P = principal, r = annual rate, n = compounds per year, t = years. Monthly contributions use the future value of an annuity formula.