About this tool
Estimate how much your savings could grow with compound interest, optionally adding a regular monthly contribution. Everything is calculated live in your browser using the standard compound interest and annuity formulas.
Frequently asked questions
How does compounding frequency affect the result?
More frequent compounding (monthly or daily vs annually) earns slightly more interest, because interest starts earning interest sooner within each year.
Are the monthly contributions included?
Yes. Each monthly contribution is compounded for the time it stays invested, and the totals show your combined deposits versus the interest earned.