How it works
- 1Enter the starting principal and optional monthly contribution.
- 2Set the annual rate, years and compounding frequency.
- 3Calculate future value, interest earned and the year-by-year schedule.
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BROWSER · Local JavaScript compound-growth model
Compound Interest Calculator
Calculate compound interest with an initial principal, monthly contributions, annual rate, term and compounding frequency.
✓ Initial principal plus recurring monthly contributions✓ Daily, monthly, quarterly or annual compounding✓ Future value, contributed capital and interest earned
Future value—
Interest earned—
Total contributions—
Growth—
Year-by-year growth
| Year | Contributed | Interest | Balance |
|---|
Illustrative estimate. Taxes, fees, inflation and market risk are not included.
About this tool
A browser-based compound interest and investment-growth calculator with recurring monthly contributions.
Frequently asked questions
How are monthly contributions handled?
Contributions are added at the end of each simulated month after that month’s effective compound return.
Can I choose daily compounding?
Yes. Daily, monthly, quarterly and annual compounding are available.
Does this predict investment returns?
No. It is a mathematical illustration and does not include taxes, fees, inflation or market risk.