Simple Interest Calculator
About Simple Interest Calculator
Use the simple interest calculator to estimate interest earned or owed on a principal amount without compounding over time.
How to Use
Use the simple interest calculator to estimate interest earned or owed on a principal amount without compounding over time. Enter the Principal amount, Annual rate, and Years values and review the Interest earned and Total amount outputs after you calculate.
- Open the calculator : Use Simple Interest Calculator from the Finance category.
- Check the inputs : Review the required values and any optional settings.
- Read the formula : Use the formula and notes below to understand how the result is produced.
Common Questions
What does the Simple Interest Calculator estimate?
Calculate interest and total amount with a fixed-rate simple interest formula.
What can change the estimate?
This is an estimate, so taxes, fees, payment timing, compounding, and changing returns can move the result.
Inputs
- Principal amount
- Annual rate
- Years
Outputs
- Interest earned
- Total amount
Formula
Interest = principal × rate × time.