Compound Interest Calculator

Compounding is when your returns start earning their own returns. Type in your numbers and watch the snowball build — the chart updates live.

Your inputs

Initial amount

Monthly contribution

Annual return As a % — e.g. 7 for 7%

Years invested

Inflation To show results in today's dollars

Delay before starting Years you wait to begin

Target amount

Starting amount

Annual return As a % — e.g. 7 for 7%

Years to reach it

Final balance

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You contributed

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out of pocket

Interest earned

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💡 In today's dollars —

⏳ Waiting 5 years costs you —

Start now

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Wait 5y

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Total balance Your contributions Today's dollars

Year	Contributions	Interest earned	End balance

Educational purposes only — not financial advice. Projections are hypothetical and don't predict actual investment performance.