FREE EDUCATIONAL CALCULATOR

Compound Interest Calculator

Project how an initial balance and monthly contributions may grow. Enter assumptions to see an estimate. No account is required.

Your details

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USD · example
Additional assumptions in use
  • Annual return convention: Nominal annual rate (selected compounding frequency)
  • Contribution timing: End of each contribution period

Basic mode retains the advanced assumptions shown here. Switching modes does not reset your values.

Your results

See a clear estimate

Enter your details to see a personalized calculation, a simple projection, and the assumptions behind it.

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Assumptions and limits

Convert the selected nominal annual rate and compounding frequency, or effective annual return, into an equivalent monthly growth rate. Apply each monthly contribution at the selected start or end of the month.

Results are educational estimates, not financial advice or guarantees. Values entered in this embedded tool are not passed into its full-page link.

Compound interest — free embed | WealthMathPro