Simple Interest Calculator – Calculate SI Online
Calculate simple interest and total amount. SI = P × R × T / 100.
Tool
Enter your values and get results instantly.
How to Use
- 1Enter principal amount
- 2Enter rate of interest
- 3Enter time period
- 4Click Calculate
- 5See interest and total amount
Benefits
Frequently Asked Questions
What is simple interest?
Simple interest is calculated only on the principal amount. The formula is SI = P × R × T / 100, where P is principal, R is rate, and T is time.
How is simple interest different from compound interest?
Simple interest is earned only on the original principal. Compound interest is earned on both the principal and previously earned interest, making it grow faster over time.
Where is simple interest used?
Simple interest is commonly used for short-term loans, car loans, and some personal loans. It is easier to calculate and understand than compound interest.
Can I calculate the total amount to repay?
Yes – our calculator shows both the interest amount and the total amount (principal + interest) you will need to repay.
Is this calculator free to use?
Completely free, no sign-up required. All calculations happen instantly in your browser.