Simple Interest Calculator
Interest = Principal × Rate ÷ 100 × Time5000 × 0.06 × 3 = $900
Free online tool
Simple Interest Calculator
Enter the principal, annual rate and time to find the interest earned or owed.
Instant calculation
Simple Interest Calculator
Enter the principal, annual rate and time to find the interest earned or owed.
Your result
Calculation
Your numbers stay in this browser. Nothing is uploaded or saved.
Three clear steps
How to use this calculator
- 01
Enter principal
Type the initial amount.
- 02
Enter rate and time
Provide the annual interest rate and number of years.
- 03
See interest
Calculate to see total interest and final amount.
The formula
How this calculation works
Simple interest is calculated only on the original principal, not on accumulated interest.
Check the method
Worked examples
Each example follows the same formula used by the calculator.
Simple interest on $5,000 at 6% for 3 years?
5000 × 0.06 × 3 = $900$900 interest; $5,900 totalCommon questions
Questions about this calculation
What is the Simple Interest Calculator?
The Simple Interest Calculator helps you calculate simple interest on a principal amount over a set time period. Enter your values and select Calculate to get an instant result.
How is the result calculated?
Simple interest is calculated only on the original principal, not on accumulated interest.
Can you show an example?
Example: Simple interest on $5,000 at 6% for 3 years? — $900 interest; $5,900 total.
Is my data saved when I use the Simple Interest Calculator?
No. All calculations run locally in your browser. Your inputs and results are never uploaded, stored or shared with anyone.
Is the Simple Interest Calculator free to use?
Yes. The Simple Interest Calculator is completely free. No account, sign-up or payment is required. It works on mobile, tablet and desktop.
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