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Compound Interest Calculator
See how savings grow with compound interest over time.
1,647.01
Final balance1,647.01
Interest earned647.01
Principal1,000
Formula / method
A = P × (1 + r ÷ n)^(n × t) where r = annual rate, n = times compounded/year
Examples
1,000 at 5% for 10y, monthly
≈ 1,647
≈ 1,647
5,000 at 7% for 20y, yearly
≈ 19,348
≈ 19,348
How to use
Enter your values above — the result updates instantly as you type. Everything is computed locally in your browser, so it is fast and private.
FAQ
What does compounding frequency change?
More frequent compounding earns slightly more, because interest starts earning its own interest sooner. The difference between monthly and daily is usually small.