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Compound Interest Calculator

Free compound interest tool — instantly work out how an investment grows with compound interest and regular contributions.

This is an estimate. Contributions are modeled as deposits at the end of each month, and no taxes or fees are included. Actual returns will vary. It is general information, not financial advice.

About this tool

The Compound Interest Calculator helps you work out how an investment grows with compound interest and regular contributions in seconds. Enter your values, press Calculate, and get an instant result — no sign-up, no downloads, completely free.

This tool is designed for savers and investors planning long-term growth. All calculations happen instantly in your browser and none of the numbers you enter are stored or shared.

Results are estimates intended for guidance. Real-world figures can differ depending on your specific situation, so double-check important decisions with an authoritative source.

Frequently asked questions

Yes. The Compound Interest Calculator is completely free, with no sign-up, downloads or usage limits.

No. All calculations run instantly in your browser and the values you enter are never stored or shared.

Compound interest is interest earned on both your original amount and previously earned interest, so growth accelerates over time.

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