Simple Interest SI Calculation

Calulator facilate to select from drop-down : Simple interest, Rate of interest, Principle or Time as desired then enter the values in the respective rows and click calculate. The time can be selected as year, month or days.

I want to calculate :
Principal or Sum [P] :
Rate % per Annum [R] : %
Time [T] :
Simple Interest [S.I.] :


The interest will be charged on the borrowed/ lended amount. The money lended or borrowed is called principal, The interest on principal remains same for every month or every year and it is calculated from the principal amount, simple interest rate and length of the time.

Example : if you want to calculate SI than enter the values for :

P = 100 , R = 10% and T = 3 years.

SI = (100 X 10 X 3)/100 = 30