💵Simple Interest Calculator
Interest and total from P, rate & time.
Disclaimer: These tools provide estimates for general information and educational use only. They are not financial, investment, tax or legal advice. Results can differ from your bank or provider's actual figures — please verify important decisions with a qualified financial professional.
About Simple Interest Calculator
Calculate simple interest and the total amount from principal, annual interest rate and time period. Uses the formula SI = (P × R × T) ÷ 100. Free online simple interest calculator.
🔒 Private by design — this tool runs entirely in your browser. Nothing you enter is uploaded to a server.
Frequently asked questions
What is the simple interest formula?＋
Simple Interest = (Principal × Rate × Time) ÷ 100, where rate is per year and time is in years.
How is it different from compound interest?＋
Simple interest is calculated only on the original principal, while compound interest is calculated on the principal plus accumulated interest.