Math & calculators

Compound interest calculator

Project compound growth with optional end-of-month contributions.

Free to useProcessed on your device

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About this tool

Project compound growth with optional end-of-month contributions. Assumes a constant nominal annual rate compounded monthly and contributions at each month end. Excludes fees, taxes and inflation; this is arithmetic, not a return forecast.

How to use

Enter starting balance and annual nominal rate (%) and years and monthly contribution in the form.
Choose the available options, then run compound interest calculator.
Review the result and copy or download it for your work.

Assumes a constant nominal annual rate compounded monthly and contributions at each month end. Excludes fees, taxes and inflation; this is arithmetic, not a return forecast.