Compound Interest

Calculate compound interest growth

How to use

1. Enter your starting amount, interest rate, and time period.
2. Choose how often interest compounds.
3. See how your money grows over time.

Why use this tool

• Compounding options: Model yearly, monthly, or daily compounding.
• Growth over time: See the future value and total interest earned.
• 100% private: Everything runs in your browser. Your data is never uploaded to a server, so it's safe for confidential content.

Frequently asked questions

What is compound interest?

It's interest earned on both your original amount and the interest already added — so your balance grows faster over time.

Does compounding frequency matter?

Yes — more frequent compounding (e.g. monthly vs yearly) slightly increases the final amount for the same rate.

Are my numbers private?

Yes. The calculation runs entirely in your browser.

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