Financial ToolsFree · No signup
Compound Interest Calculator
What is Compound Interest Calculator?
A compound interest calculator shows how savings grow when interest is added to your balance and then earns interest itself. You enter a starting amount, monthly contribution, annual rate and years.
How Compound Interest Calculator helps
- Shows the effect of time and regular saving
- Separates your contributions from interest earned
- Helps compare rates and horizons
How to use Compound Interest Calculator
- Enter your numbers in the fields (sample values are pre-filled).
- Read the results, which update instantly.
- Change one input at a time to compare scenarios.
Example
1,000 saved with 100 a month at 6 percent for 10 years grows to about 18,200 with monthly compounding.
Frequently asked questions
How often does it compound?
This tool compounds monthly.
Does it include tax or inflation?
No. Real returns will be lower after tax and inflation.
Is this a forecast?
No. Real returns vary. It is an illustration.
Results are estimates for general information only and are not financial, tax or investment advice. Check numbers with a qualified professional.
Last updated October 7, 2026.