Compound Interest Calculator
Calculate compound interest with configurable principal, rate, years, and compounding frequency.
How to Use Compound Interest Calculator
The Compound Interest Calculator is a free online tool that shows how your money grows over time with compound interest. Enter your initial principal, annual interest rate, number of years, and how often interest compounds (monthly, quarterly, daily, etc.) to see the final amount and total interest earned. The formula A = P(1 + r/n)^(nt) is displayed for reference. Whether you are planning savings goals, comparing investment options, understanding mortgage costs, evaluating CD rates, or teaching financial literacy, this calculator provides clear results showing the power of compounding. All calculations happen instantly in your browser.
Step-by-Step Instructions
- Enter the principal amount (initial investment)
- Set the annual interest rate and number of years
- Choose the compounding frequency (monthly, quarterly, etc.)
- View the final amount, total interest earned, and formula
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