Compound Interest Calculator

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How many times per year interest is added (12 = monthly, 365 = daily).

Future value
$40,387.39
Total interest earned
$30,387.39
$0 $20.2k $40.4k 0y 5y 10y 15y 20y
Balance over time. The flat horizontal line marks your starting principal, everything above it is interest earned. The gap widens exponentially as compounding kicks in.

This calculator shows deterministic growth at a fixed rate for understanding the math, not as a forecast for any specific account; real investment returns vary year-to-year and aren't guaranteed. Not investment advice; consult a qualified financial advisor before committing.

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