Compound Interest Calculator
Calculate your investment growth with our comprehensive compound interest calculator. See how your money can grow over time with the power of compounding.
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Compound interest is the process by which an investment grows over time as interest earns interest. Unlike simple interest, which is calculated only on the initial amount, compound interest factors in previous interest payments.
The more frequently interest is compounded — monthly, quarterly, or yearly — the faster your money can grow. This powerful effect is why compound interest is often called "the eighth wonder of the world."
Use our calculators above to see how even small, regular contributions can add up significantly over time.
Simple Interest
Interest calculated only on the original amount
Compound Interest
Interest calculated on principal + previous interest
$15.04 more than simple interest!
Why Compound Interest Matters
Exponential Growth
Your money grows faster over time as interest compounds
Time Advantage
Starting early gives you more time for compounding to work
Passive Income
Your money works for you, earning returns on returns