Compound Interest Calculator

Visualize how your money grows over time with compound interest

Investment Details

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$

Investment Growth Over Time

Final Balance
$0
Total Contributions
$0
Total Interest Earned
$0
Return on Investment
0%

How Compound Interest Works

Compound interest is the interest you earn on both your original investment and on the interest you've already earned. It's often called the "eighth wonder of the world" because of its powerful effect on growing wealth over time.

Unlike simple interest, which only earns returns on the principal amount, compound interest accelerates your wealth growth by reinvesting your earnings. This creates a snowball effect where your money grows exponentially rather than linearly.

The Compound Interest Formula

A = P(1 + r/n)^(nt) + PMT × (((1 + r/n)^(nt) - 1) / (r/n))

Where: A = Final amount, P = Principal, r = Annual interest rate, n = Compound frequency, t = Time in years, PMT = Monthly contribution

Key Factors That Affect Your Growth