Compound Interest Calculator

See how your money grows with compound interest. Includes a chart over time.

About this Calculator

Compound interest is the eighth wonder of the world — and this calculator makes it visible. Enter your starting principal, annual interest rate, compounding frequency, and time horizon to see exactly how your wealth accumulates. The interactive growth chart shows the stark difference between simple and compound growth, and how small changes in rate or frequency compound into dramatically different outcomes over decades.

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