Compound interest calculator
Estimate investment growth with compounding and regular contributions.
Fill in the fields and the result will appear here automatically.
Use this compound interest calculator to see how an initial amount can grow over time with annual rate and contributions.
How it works
Formula and logic
The calculator applies compound growth over the selected term and adds regular contributions according to the chosen frequency.
Example
Try a starting amount of 10,000 with monthly contributions to see how compounding changes the final balance.
Fields and units
- Initial amount — $
- Rate — %
- Compounding frequency — list option
- Years — unitless
- Regular contribution — $
- Frequency — list option
How to use
- — Enter the starting amount.
- — Set the annual rate, term and contribution.
- — Review final balance and profit.
Enter the starting amount. Set the annual rate, term and contribution. Review final balance and profit.
Sources and review status
- Calculation method
- The calculator applies compound growth over the selected term and adds regular contributions according to the chosen frequency.
- Data or methodology source
- The formula and input definitions documented on this page.
- Last reviewed
- Limitation
- This is a reference estimate. Contract fees, benefits and individual terms are included only when the form has a matching input.
FAQ
How accurate is this compound interest calculator?
The result is a practical estimate based on the values you enter and the formula shown on the page.
Does this compound interest calculator require an account?
No. The calculator works in your browser and does not require registration.
Can I share a compound interest calculator result?
Yes. Use the share link to copy the current inputs in the page URL.