Compound Interest Calculator

Compound Frequency

Initial Investment

Interest Rate


Length of Time


Compound Interest


Compound Amount


Compound interest is the interest calculated on the principal and the interest accumulated over the previous period. It is different from simple interest, where interest is not added to the principal while calculating the interest during the next period.

CI = P(1 + R/100)^T - 1

CA = P + CI

  CA = Compound Amount
  CI = Compound Interest
  P = Principal Amount
  R = Rate of Interest per year as a percent
  T = Time Period involved in years