Simple Interest Calculator
The Simple Interest Calculator computes interest that accrues at a flat rate per period on the original principal — showing the interest earned and the total amount instantly.
How to use
- 1Enter the principal.
- 2Enter the rate per period.
- 3Enter the number of periods and see the result.
Why FREE PDF?
- Completely free
- No account required
- Processing happens in your browser whenever possible
- Your files stay yours
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Frequently Asked Questions
What's the difference from compound interest?
Simple interest is always calculated on the original principal; compound interest adds each period's interest back into the principal before the next calculation.