Finance Tools
Simple Interest Calculator
Calculate simple interest on a loan or investment based on principal, rate, and time.
Calculate simple interest on a loan or investment based on principal, rate, and time.
How to use this simple interest calculator
- Enter the principal amount (starting balance).
- Enter the annual interest rate as a percentage.
- Enter the time period in years (or decimal years, e.g. 1.5 years).
- Click Calculate to see the interest earned or paid and the total amount after interest.
Example
For example, suppose you invest $5,000 at 6% simple interest for 3 years. This calculator will show you:
- The total simple interest earned over the 3-year period.
- The total amount you will have at the end (principal + interest).
- How the result changes if you adjust the rate or time period.
- A quick way to compare simple-interest loans or investments.
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