Calculators
Compound interest calculator
See how savings or investments grow with compounding and contributions.
Free to use · Runs in your browser · No signup
This tool works in your browser. Enable JavaScript to select files and create your download.
How to use Compound interest calculator
- Enter your starting amount, interest rate, and number of years.
- Choose how often interest compounds and add a monthly contribution if you like.
- Review the future value and the year-by-year growth.
What you need
Nothing to upload. Type or paste directly into the tool; results update as you go.
Your result
Future value, interest earned, and a yearly table.
Before you start
Assumes a constant rate, with contributions at the end of each month. Real returns vary and may be reduced by fees and taxes. Not financial advice.
Questions about Compound interest calculator
How do I use Compound interest calculator?
Enter your starting amount, interest rate, and number of years. Choose how often interest compounds and add a monthly contribution if you like. Review the future value and the year-by-year growth.
What does Compound interest calculator produce?
Future value, interest earned, and a yearly table.
What should I check before using Compound interest calculator?
Assumes a constant rate, with contributions at the end of each month. Real returns vary and may be reduced by fees and taxes. Not financial advice.
Is what I type sent anywhere?
No. The calculation runs in your browser, and the text or numbers you enter are not uploaded or stored.