Compound Interest Calculator

Calculate the future value of an investment or savings account, including regular contributions and different compounding frequencies.

All calculations happen in your browser.

How to use Compound Interest Calculator

  1. Enter the starting amount, annual interest rate and number of years.
  2. Choose the compounding frequency and any monthly contribution.
  3. See the final balance, total interest earned, and a year-by-year breakdown.

About this tool

Compound interest is how savings and investments grow faster over time — you earn interest on your interest. This calculator shows the final balance, the interest earned, and how contributions accelerate growth.

Frequently asked questions

What does compounding frequency mean?
It is how often interest is calculated and added to your balance — annually, quarterly, monthly or daily. More frequent compounding grows your money slightly faster.
Are taxes or fees included?
No. The calculation is a straightforward mathematical projection. It does not account for tax, inflation or investment fees.

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