Compound Interest Calculator

Calculate compound interest on an investment or savings. Using the compound interest formula, calculate principal plus interest or principal or rate or time. Includes compound interest formulas to find principal, interest rates or final investment value including continuous compounding A = Pe^rt.

Compound Interest Calculator | Investor.gov

Compound Interest Equation

A = P(1 + r/n)nt

Where:

  • A = Accrued 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 = R/100
  • t = Time Involved in years, 0.5 years is calculated as 6 months, etc.
  • n = no. of compoundings per year
Compound Interest Calculator
Interest Calculator
Principal Amount
Interest Rate
Interest Type
Compounding Frequency
Period (months)
Interest Amount

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