Free Compound Interest Calculator

Calculate the future value of your investments with our easy-to-use compound interest calculator.

Compound Interest Calculator

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%
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Future Value

$8,194.16
Initial Investment
$1,000.00
Total Contributions
$6,000.00
Total Interest Earned
$1,194.16

About Compound Interest

Compound interest is calculated on the initial principal and also on the accumulated interest over previous periods. It's the result of reinvesting interest, rather than paying it out, so that interest in the next period is earned on the principal sum plus previously accumulated interest.

Compound Interest Formula

A = P(1 + r/n)nt + PMT[(1 + r/n)nt - 1]/(r/n)

Where:

  • A = Final amount
  • P = Principal (initial investment)
  • r = Annual interest rate (decimal)
  • n = Compound frequency per year
  • t = Time in years
  • PMT = Regular contribution amount