Compound Interest Calculator

Compound Interest Calculator to calculate investment growth, earned interest, and future savings with compound returns over time.

Account Details

Current savings (Initial deposit)

$0$500k$1M

Annual interest rate

0%12.5%25%

Extra Contributions

Extra contribution (per month)

$0$5k$10k

How often to contribute

Compounding & Time

Interest compound frequency

Savings Time Period

12550

Results

Final balance

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Total contributions

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Total interest earned

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Initial deposit → final

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Effective APY

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Extra from compounding

—

Avg interest / period

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Total compound periods

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Simple interest (for comparison)

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Balance composition

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DepositContribInterest

Final Balance Composition

Initial deposit

Contributions

Interest earned

Balance Growth Over Time

Balance

Cumulative contributions

Cumulative interest

Year-by-Year Breakdown

Year	Contributions	Interest	Balance	Cum. Interest	Total Return %