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Simple Interest Calculator

Compute interest on your loans or deposits easily

Calculate simple interest using the formula SI = (P × R × T) / 100. Perfect for loans, deposits, and savings calculations.

How to use this tool
  • Enter the Principal amount (e.g., ₹10,000)
  • Enter the Rate of Interest (%) per year (e.g., 8%)
  • Enter the Time in years (e.g., 2 years)
  • Click Calculate to see the simple interest and total amount
Privacy & Security

All calculations are performed locally in your browser. No data is ever sent to any server.

Simple Interest Formula
  • Simple Interest (SI) = (P × R × T) / 100
  • Total Amount = Principal + Simple Interest
  • Time can be entered in years (months/12 for months, days/365 for days)
What is simple interest?

Simple interest is calculated only on the principal amount, not on accumulated interest. Formula: SI = P × R × T / 100.

Can I use this for months or days?

Yes, convert months to years (months/12) and days to years (days/365) for accurate calculation.

Is my data secure?

Yes. All calculations happen on your device. No information is transmitted or stored.

Is this tool free?

Yes – completely free with no registration, limits, or watermarks.

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