Simple Interest Calculator
Calculate simple interest and the total amount for any period.
Your data is processed in your browser and is not uploaded to our servers.
About the Simple Interest Calculator
Simple Interest Calculator applies the formula Interest = Principal × Rate × Time to show the interest earned or owed and the final amount. Simple interest is calculated only on the original principal.
How to use the Simple Interest Calculator
- Enter the principal amount.
- Enter the annual rate and the time in years.
- Read the interest and total.
Frequently asked questions
How is simple interest different from compound interest?
Simple interest never earns interest on previous interest, while compound interest does.
Can I use months?
Enter time as a fraction of a year, for example 6 months = 0.5.