Calculate simple interest instantly using our free online calculator. Fast, accurate, and perfect for students, businesses, and investors.
Simple interest is calculated only on the original principal amount...
This free simple interest calculator helps you avoid manual errors...
SI = (Principal × Rate × Time) / 100
Students, bankers, investors, business owners...
Simple interest is calculated using SI = (P × R × T) ÷ 100, where P is the principal amount, R is the annual interest rate, and T is the time period in years.
Enter the principal, rate, and duration, and the calculator multiplies these three values together (divided by 100) to give the interest earned or owed, plus the total amount (principal + interest).
Simple interest is calculated only on the original principal for the entire duration, while compound interest also earns interest on previously accumulated interest.
Yes, just convert months to years first (e.g. 6 months = 0.5 years) before entering the time period.
Some short-term personal loans and certain fixed deposits use simple interest, though many bank loans actually use compound interest via EMI structures.