Simple Interest Calculator
Calculate simple interest and the total amount on a deposit or loan. Free online simple interest calculator using SI = P x R x T / 100.
After 5 years, ₹1,00,000 grows to ₹1,40,000.
Total amount over time
Frequently asked questions
What is the simple interest formula?
Simple interest is SI = P x R x T / 100, where P is the principal, R is the annual interest rate and T is the time in years. The total amount is the principal plus the interest, and interest does not compound.
How is simple interest different from compound interest?
Simple interest is charged only on the original principal, so it grows linearly. Compound interest is charged on the principal plus accumulated interest, so it grows faster over time.
Is this calculator private?
Yes. It runs entirely in your browser — nothing you enter is uploaded, stored or tracked.
Related tools
Read the guide: What Is Simple Interest and How Is It Calculated?
Results are estimates for illustration only and not financial advice.