Compound Interest Calculator

Forecast your investment growth and see the exponential power of compounding interest over time.

$
$
%
Years
Estimated Future Value$44,867.20After 10 years at 7% annual return
Total Contributions$29,000.00
Total Interest Earned$15,867.20

Projections assume monthly compounding. Actual returns will vary.

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Understanding Compound Interest

Compound interest is often referred to as the "eighth wonder of the world" because it allows your money to earn interest on interest. Unlike simple interest, which is calculated only on the initial principal, compound interest reinvests your earnings so your portfolio grows exponentially over long horizons.

The Compound Interest Formula

A = P × (1 + r / n)^(n × t)

Key Drivers of Investment Growth

  • Time in the Market: Starting early gives compounding more cycles to multiply your capital.
  • Regular Monthly Contributions: Adding regular savings steadily speeds up portfolio accumulation.
  • Compounding Frequency: Compounding monthly or daily yields slightly higher annual returns than compounding annually.

Frequently Asked Questions

Compound interest is interest earned on both the original principal amount and the accumulated interest from previous periods. Over time, it accelerates savings growth compared to simple interest.

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