Compound Interest Calculator

Compound interest allows your investments to grow geometrically over time. A small monthly deposit over a couple of decades will produce incredible results even with a conservative interest rate. This calculator, also often called an investment calculator, is for figuring the future value of a periodic investment (one that you repeatedly make at a given interval). You can also try our Lump Sum Future Value Calculator to find the affect of compound interest on a one time investment.

Compound Interest Calculator

Find the future value and interest earnings of any periodic investment, including an allowance for an initial investment or lump sum.
Enter the initial investment (optional):
Enter the deposit amount:
Enter the annual interest rate:
Enter the number of years:
Future value:
Interest earned:

What You Should Know