Simple Interest Calculator
Calculate simple interest — find interest and total amount from principal, rate and time. Perfect for a committee, a loan from a friend, or basic saving.
Interest Earned
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Total Amount
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Formula
I = P × R × T / 100
How to use
- Choose the mode from above — find interest, rate, time or principal.
- Enter the other values: principal in Rs, rate in %, time in years or months.
- The result shows instantly — no button to press.
- Simple interest is charged only on the original principal — it does not add interest on interest like compound interest.
Frequently Asked Questions (FAQ)
What can I calculate?
Choose what to find: interest and total amount, rate, time or principal.
What inputs does it need?
Principal amount in rupees, annual rate in percent, and time in years or months.
Which formula does it use?
I = P x R x T / 100. It shows the interest earned and the total amount separately.
Can I use months for the time period?
Yes. Enter the time in years or months and the tool handles the conversion.
How is this different from compound interest?
Simple interest is charged only on the original principal. It does not add interest on interest the way compound interest does.