Compound Interest Calculator

How to use the compound interest calculator

Enter the requested values, review the units, and select Calculate. The result updates only after every input passes validation.

The stated annual rate is converted using the chosen compounding frequency. Growth is applied monthly and each contribution is added at the end of the month.

Worked example

With no interest, $1,000 plus $100 at the end of each month grows to $2,200 after one year.

Limitations

Investment returns are not guaranteed. Timing, fees, taxes, and changing rates can materially change actual results.

This calculator provides an educational estimate and does not replace advice from a qualified financial or tax professional.