Simple Interest Calculator
Result
Simple Interest Calculator — free online calculator.
Formula
- Enter the values shown to calculate all corresponding results, not just a single final number. Simple Interest = Principal × Annual Rate(%) × Years / 100; Total Amount = Principal + Interest; Daily Interest = Principal × Annual Rate(%) / 36500.
- The main inputs are Principal Amount, Annual Rate, Time Period. Enter them in the units and format shown in the calculator.
- Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: Simple Interest
- Principal Amount: 100000
- Annual Rate: 12
- Time Period: 3
Using Principal Amount = 100000, Annual Rate = 12, Time Period = 3, the calculated result is 136000.
Sample result: Calculating…
Frequently asked questions
What does the Simple Interest calculate?
Simple Interest Calculator — free online calculator.
Which values should I enter?
Enter Principal Amount, Annual Rate, Time Period using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: Simple Interest = Principal × Annual Rate(%) × Years / 100; Total Amount = Principal + Interest; Daily Interest = Principal × Annual Rate(%) / 36500..
Why might my result differ from another source?
Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.