Add the requested inputs
Use the labelled fields in the workspace above. If example values are provided, try them first or replace them with your own.
Money & business · Free online tool
Compound interest calculator
Project savings growth with regular contributions and different compounding frequencies. Explore how a starting balance, rate, time and recurring contribution affect a future value.
3 guest runs per rolling 24 hours10 with a free accountPrivate inputsMobile-friendly
Compound interest calculator workspace
Runs locally in your browser
Result
Projected balance—
Interest earned—
Total contributed—
Effective annual rate—
Term—
Year-by-year projection
Use it with confidence
How to use the compound interest calculator.
Calculate and review
Use the main action when needed. The tool compounds the current balance each period and adds contributions on the selected schedule, producing a year-by-year projection.
Try a worked example
Compare the same monthly saving over 5, 10 and 20 years to see the effect of time.
Check the assumptions
Returns are illustrative and exclude tax, fees, inflation and market variability. It is not investment advice.
Helpful answers
Compound interest calculator FAQs.
Is the compound interest calculator free?
Yes. Guests receive 3 runs per rolling 24 hours, verified free accounts receive 10, and Premium subscribers receive unlimited normal use.
Does UtilHub upload or save my inputs?
No. This tool runs in your browser and UtilHub does not receive or store the values you enter. Your browser or device may still retain normal local history or form data.
How does this compound interest calculator work?
The tool compounds the current balance each period and adds contributions on the selected schedule, producing a year-by-year projection.
What should I check before using the result?
Returns are illustrative and exclude tax, fees, inflation and market variability. It is not investment advice.