Compound Interest Calculator

See how your money grows over time with the power of compound interest. Enter your starting balance, monthly contributions, interest rate, and time horizon.

Inputs

$

Starting balance

$

Added each month

%

Expected annual return (nominal)

How often investment returns compound

Investment horizon

%

Used for real (inflation-adjusted) values

Chart and summary stats use nominal dollars when enabled.

Growth Over Time

Principal plus contributions compared with total growth including compound interest.

Final amount

$854,537

Total contributions

$190,000

Total interest

$664,537

Frequently Asked Questions

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