Simple Interest Calculator
Calculate simple interest on loans and investments. Easy-to-use calculator showing principal, interest rate, and time calculations.
Simple interest is calculated only on the original principal amount. Unlike compound interest, the interest doesn't earn additional interest over time. This type of interest is commonly used for short-term loans, car loans, and some bonds.
Calculator
Common use cases
- Calculating interest on short-term loans
- Understanding car loan interest
- Computing interest on certificates of deposit
- Educational purposes for learning interest basics
How to use
- Enter the principal amount (initial investment or loan amount)
- Input the annual interest rate as a percentage
- Specify the time period in years (use decimals for months, e.g., 0.5 for 6 months)
- View the calculated interest and total amount
FAQ
What is simple interest?
Simple interest is calculated using the formula I = P × R × T, where P is principal, R is the annual interest rate, and T is time in years.
When is simple interest used?
Simple interest is commonly used for car loans, short-term personal loans, and some types of bonds.
Is simple interest better than compound?
For borrowers, simple interest results in less total interest paid. For savers, compound interest earns more money over time.
This calculator provides illustrative estimates for planning purposes only and does not constitute financial, tax, or legal advice.