Compound Interest Calculator

CompoundInterest Calculator

By WealthBuildingFire.com

Adjust the sliders to see how your money grows over time through the power of compounding.

Final Balance

$38,697

After 20 years at 7%

Interest Earned

$28,697

Growth Multiple

3.87×

vs. Simple Interest

+$4,490

Effective Rate

7.23%

Initial Investment $10,000
Annual Rate 7.0%
Time Period 20 years
Compounds / Year Monthly (12×)

Formula

A = P × (1 + r/n)n·t

Growth Over Time

Compound
Simple
Principal

Principal vs. Interest

Principal $10,000 Interest $28,697 (74%)