# Simple Interest (SI) and Compound Interest (CI) Calculator, Formulas

# Simple and Compound Interest Calculator

An online SI and CI calculation used in day to day life.

**Formula for Interest Compounded Yearly**

Total Amount = P(1+(R/100))^{n}

**Formula for Interest Compounded Half Yearly**

Total Amount = P(1+(R/200))^{2n}

**Formula for Interest Compounded Quarterly**

Total Amount = P(1 + (R/400))^{4n}

SI [Interest] = (P × R × T) / 100

P [sum] = (SI × 100) / (R × T)

R [Rate/year] = (SI × 100) / (P × T)

T [Time] = (SI × 100) / (P × R)

**Where,**

C.I = Compound Interest,

S.I = Simple Interest

P = Principle or Sum of amount

n = Time Span in years

R = % Rate per annum

T = Time Span