Compound Interest Calculator
Investment parameters
$
$
%
years
Projection
What the account is worth at the end of the term.
Future Value
$280,657.02
Total Contributed
$125,000.00
Interest Earned
+$155,657.02
About the Compound Interest Calculator
Project what savings or an investment could be worth from a starting amount, a monthly contribution, an annual interest rate and a number of years. Interest compounds monthly, and the result splits the balance into what you paid in and what interest added.
How to use it
- 1 Enter the Initial Investment you start with, or 0 if you are starting from nothing.
- 2 Enter the Monthly Contribution you plan to add each month.
- 3 Enter the Annual Interest Rate (%) and the Investment Period (Years) as a whole number.
- 4 Read the Future Value, then compare Total Contributed with Interest Earned to see how much came from compounding.
Frequently asked questions
Monthly. The annual rate is divided by 12 and applied every month, and each monthly contribution is added at the end of the month.
The future value equals what you put in: the initial investment plus every monthly contribution, with no interest earned.
No. It applies one constant rate with nothing deducted, so the future value is in future dollars before tax and fees. Try a lower rate as well to see a more cautious estimate.
Any whole number of years from 1 to 100, at an annual rate between 0% and 100%.