What is the difference between simple and compound interest?

Simple interest calculates returns solely on the original principal. Compound interest calculates returns on the principal plus previously accumulated interest, yielding exponential growth.

What compounding frequency yields the highest return?

More frequent compounding yields higher returns. Daily compounding is slightly better than monthly, which beats quarterly and annual compounding.

APR represents the annual interest rate without compounding. APY is the effective annual rate that incorporates compounding, making it higher than APR.

What is the Rule of 72?

A mental shortcut to estimate investment doubling time: divide 72 by the annual interest rate. At 6%, money doubles in about 12 years (72 ÷ 6).

Do I need to create an account?

No account is required for basic use of this online tool.

Can I use this tool on mobile?

Yes, the tool is designed to work on desktop, tablet, and mobile browsers.

What is compound interest?

Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. It is often called 'interest on interest'.

How does compounding frequency affect returns?

More frequent compounding (daily vs. annually) results in slightly higher returns because interest is calculated and added to the principal more often.

What is the Rule of 72?

The Rule of 72 is a quick way to estimate how long it takes to double your investment. Divide 72 by the annual interest rate to get the approximate number of years.

Compound Interest Calculator — Exponential Growth Tool

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Year-by-Year Growth

Principal ($)

Annual Rate (%)

Time (years)

Compound Frequency

Monthly Contribution ($)

Final Balance

Interest Earned

Total Deposited

Year-by-Year Growth

Year	Balance	Interest	Contributions

Year-by-Year Growth

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