Example: Interest 600.00. Change the values above to calculate your own.
About the Simple Interest Calculator
Simple interest is charged only on the original amount, unlike compound interest. It's used for some short-term loans, bonds and many school maths problems.
How to use the Simple Interest Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
How it's calculated
Interest = principal × rate × time ÷ 100. Total = principal + interest.
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
Is the Simple Interest Calculator free?
Yes, the Simple Interest Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.