Simple Interest Calculator
Calculate simple interest and total amount.
Calculator results are estimates for informational purposes only and should not be considered financial advice. Actual results may vary depending on lender terms, taxes, fees, rates, and other conditions.
What is the Simple Interest Calculator?
A simple interest calculator computes interest on the original principal only, without compounding. Enter the principal, annual rate, and time to see the interest and the total amount payable — commonly used for short-term loans and deposits.
Formula & how it works
SI = (P × R × T) ÷ 100- P
- = principal
- R
- = annual rate (%)
- T
- = time in years
Example
₹1,00,000 at 8% for 5 years.
Inputs
- Principal
- ₹1,00,000
- Rate
- 8%
- Time
- 5 years
Results
- Interest
- ₹40,000
- Total amount
- ₹1,40,000
SI = (100000 × 8 × 5) ÷ 100 = ₹40,000. Total = ₹1,40,000.
How to use this calculator
- 1Enter the principal amount.
- 2Enter the annual interest rate.
- 3Enter the time in years.
- 4See the interest and total amount.
Frequently asked questions
What is simple interest?+
Simple interest is calculated only on the original principal, not on accumulated interest.
How is simple interest different from compound interest?+
Simple interest stays constant each period, while compound interest grows because it is calculated on principal plus previous interest.