What is compound interest?

Interest earned on both the initial principal and previously accumulated interest — making your money grow exponentially.

How does compounding frequency affect returns?

More frequent compounding (daily vs annually) earns slightly more because interest starts earning interest sooner.

Yes — add monthly or annual contributions to see how regular investing accelerates growth.

APR is the annual rate without compounding. APY includes compounding and shows your actual yearly return.

Calculate compound interest and investment growth. Instant, accurate, free.

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Initial Investment ($)

Annual Rate (%)

Years

Compound

Monthly Contribution ($)

Final Balance

$54,713.58

Total Deposits

$34,000.00

Interest Earned

$20,713.58

Show yearly breakdown

Year	Balance	Deposits	Interest
1	$13,201.42	$12,400.00	$801.42
2	$16,634.27	$14,800.00	$1,834.27
3	$20,315.28	$17,200.00	$3,115.28
4	$24,262.39	$19,600.00	$4,662.39
5	$28,494.83	$22,000.00	$6,494.83
6	$33,033.24	$24,400.00	$8,633.24
7	$37,899.74	$26,800.00	$11,099.74
8	$43,118.03	$29,200.00	$13,918.03
9	$48,713.55	$31,600.00	$17,113.55
10	$54,713.58	$34,000.00	$20,713.58

How useful is Compound Interest Calculator?

Enter your initial investment (principal)

Set the annual interest rate

Choose the compounding frequency — daily, monthly, quarterly, or annually

Enter the investment period and optional monthly contributions

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