Simple Interest Calculator
Calculate the simple interest and final amount on a deposit or loan.
Show solution steps
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What is the Simple Interest Calculator?
Simple interest is calculated only on the original principal for the entire duration — unlike compound interest, the interest earned along the way never itself earns further interest. It's less common than compound interest for long-term savings, but still used for some short-tenure loans, certain deposit schemes, and situations where the calculation needs to stay straightforward and predictable.
How to Calculate
Enter the principal amount, the annual interest rate, and the time period in years. The calculator multiplies principal × rate × time and divides by 100 to get the interest earned, then adds that to the principal to show the final maturity amount — a fixed, linear growth rather than the accelerating curve you get with compounding.
Formula
Simple Interest = (P × R × T) ÷ 100
How to Use
- Enter your details in the fields above.
- The result updates instantly as you type.
- Use Copy, Print or Download PDF to save your result.