# Compound Interest Calculation Online

Calculates the compound interest or principal amount or interest rate on basis of selected values.

 I want to calculate = Compound Interest (CI) Principal (P) Rate of Interest (R) Interest Compounded : Annually Half-yearly Quarterly Principal or Sum [P] : Rate % per Annum [R] : % Time Years [n] : Compound Interest [C.I.] : Total Amount :

Find compound interest for annual, half yearly or quarterly compound interest. Compound interest is a concept of adding accumulated interest back to principal amount. The act of declaring interest to be principal is called compounding and

### Formula for Compound Interest is :

A = P(1 + r/n)nt

Where:
A = Total Amount (principal + interest),

P = Principal Amount

I = Interest Amount

R = Annual Nominal Interest Rate in percent

r = Annual Nominal Interest Rate as a decimal = R/100

t = Time Involved in years, 0.5 years is calculated as 6 months, etc.

n = number of compounding periods per unit t; at the end of each period