Simple interest equals principal multiplied by rate and time.
Simple Interest Calculator
Calculate simple interest and total payable amount from principal, rate, and time.
About this tool
Simple Interest Calculator helps you calculate simple interest and total payable amount from principal, rate, and time. It runs directly in your browser for speed and privacy with no sign-up required. Use the steps below to get results quickly, then copy or download the output and continue with related tools when needed. Try next: Compound Interest Calculator • Loan / EMI Calculator.
How to use
- Enter principal amount.
- Input annual interest rate in percent.
- Enter time in years.
- Click Calculate to get total interest and final amount.
- Use Try example for a quick preset.
Related tools
Try next: Compound Interest Calculator • Loan / EMI Calculator • GST / VAT Calculator.
Frequently asked questions
Yes, decimal values for time are supported.
No, this calculator applies non-compounding simple interest only.
Yes, the entered rate is annual percentage rate.