Simple Interest Calculator
Flat-rate interest on principal — quick and transparent. Calculate simple interest instantly. Enter principal, rate and time to get interest earned and total amount. Free simple interest calculator with formulas.
Acerca de Simple Interest Calculator
Simple interest is the honest elder sibling of compound interest: interest is charged only on the original principal, never on accumulated interest. This calculator applies the classic formula SI = P × R × T ÷ 100, showing the interest earned and the final amount for any principal, annual rate and period in years, months or days. It also displays the working, making it a favourite for school problems, informal loans between friends and flat-rate product comparisons.
Cómo usar Simple Interest Calculator
- Enter the principal amount.
- Enter the annual interest rate.
- Set the period — years, months or days.
- Read the interest and total amount.
Características principales
- Classic SI = PRT formula
- Periods in years, months or days
- Shows the calculation working
- Interest and final amount together
When is simple interest used in real life?
How is simple interest different from compound?
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