Compound interest calculator

Project a balance with monthly compounding and optional monthly contributions.

Numbers Stateless

Quick guide

Try an example

You enter

Starting balance
1000
Monthly contribution
100
Nominal annual interest rate (%)
12
Term in months
1

You get

Projected balance
1110.00
Total contributed
1100.00
Interest earned
10.00
How it works and limits

Use a fixed nominal annual rate and enter the term in months. Contributions are added at the end of each month. The estimate excludes fees and taxes.