Simple Interest Calculator - Free, Instant, In Your Browser
Enter the principal, annual rate, and number of years (Interest = Principal × Rate × Years ÷ 100).
How to use Simple Interest Calculator
- 1Enter the required date(s) and details above.
- 2Click Calculate - Simple Interest Calculator runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
Interest = Principal × Rate × Years ÷ 100, where Rate is the annual percentage.
How is this different from compound interest?
Simple interest is only ever calculated on the original principal - it never earns interest on previously earned interest.