How to use the simple interest calculator
- Enter the principal and the yearly interest rate.
- Enter the time and choose years, months or days.
- Press Calculate to see the interest and the total amount.
Simple Interest Calculator
Work out simple interest on a loan or deposit for any number of years, months or days, and the total to be repaid or received.
- Free
- Instant
- No sign-up
How to use this calculator
- Pick what to find Choose a mode, or start with the first box.
- Enter your numbers Type your values into the boxes.
- Read the result See the answer and the working, then copy or share it.
Simple interest calculator
Enter the principal, rate and time, then press Calculate.
Interest
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How it was calculated
Frequently asked questions
What is the simple interest formula?
SI = P × R × T ÷ 100. Total amount = P + SI.
How much interest on ₹50,000 at 8% for 3 years?
₹50,000 × 8 × 3 ÷ 100 = ₹12,000, so the total is ₹62,000.
How do I use months or days?
Choose months or days in "Time in". The calculator turns them into years (months ÷ 12, days ÷ 365) before applying the formula.
About these results
Lenders that charge by the day may use a 360- or 365-day year; check your agreement.
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