Compound Interest Calculator
See how savings grow over time.
See how your money grows with compound interest. Enter a starting amount, an interest rate, a time horizon, and an optional monthly contribution to see the future value — and how much of it is interest versus what you put in.
Assumes interest is compounded monthly and contributions are made at the end of each month. Currency-agnostic — the figures are in whatever currency you enter.
Runs entirely in your browser — nothing is uploaded.
How to use the compound interest calculator
- 1Enter your initial amount and monthly contribution.
- 2Set the interest rate and number of years.
- 3See the future value and total interest.
Frequently asked questions
How is it compounded?
Interest is compounded monthly, and contributions are added at the end of each month — the most common setup for savings and investments.
What currency does it use?
It's currency-agnostic: the figures are shown in whatever currency you enter, with no symbol assumed.