Calculate
Simple Interest Calculator
Enter the principal, annual interest rate, and time period to see the simple interest earned and the total maturity amount. Calculated locally.
Details
LocalResult
FAQ
Common questions
Simple interest = P × R × T ÷ 100, where P is principal, R is the annual rate percent, and T is time in years.
The principal plus the simple interest earned over the period.
Yes — choose months and it is converted to years (months ÷ 12) before applying the formula.
No. All calculation happens in your browser.
Private by design
This runs entirely in your browser
No file or text you enter here is uploaded. Encoding and decoding happen on your device using native browser APIs — close the tab and nothing remains on a server.