CD APY Calculator

CD Interest Calculator

Initial Deposit

Enter an amount between $1 and $10,000,000.

Rate Type

APYInterest Rate

APY

CD Term

Compounding

Included in APY

APY already accounts for compounding.

Your CD Return

Ending Balance

$10,450.00

Initial Deposit: $10,000.00
Interest Earned: +$450.00
Total Return: 4.50%

A $10,000 CD earning 4.50% APY for 12 months would grow to approximately $10,450.00, including $450.00 in interest.

Estimates are based on the information you enter and may differ from the actual amount paid by a bank.

Balance Growth

Compare CD Rates

How different rates affect your balance over the same term.

CD rate comparison using your deposit and term
APY	Interest Earned	Ending Balance
4.00%	$400.00	$10,400.00
4.50%Current	$450.00	$10,450.00
5.00%	$500.00	$10,500.00
5.50%	$550.00	$10,550.00

Compare CD Terms

How your balance changes across common CD terms at your current rate.

CD term comparison using your deposit and rate
Term	Interest Earned	Ending Balance
3 months	$110.65	$10,110.65
6 months	$222.52	$10,222.52
12 monthsCurrent	$450.00	$10,450.00
24 months	$920.25	$10,920.25
36 months	$1,411.66	$11,411.66
60 months	$2,461.82	$12,461.82

What Is CD APY?

APY stands for annual percentage yield. It represents the effective annual return on a deposit after compounding is included. A CD APY is useful for comparison because it shows the actual rate you would earn over one year, even when interest is compounded monthly, daily, or on another schedule.

In APY mode, this calculator uses the formula Ending Balance = Principal × (1 + APY)^t. The APY is already treated as the effective annual return, so the calculator does not apply a second layer of compounding. This keeps the estimate accurate when you only know the APY.

How to Use the CD APY Calculator

Enter your initial deposit, select APY as the rate type, enter the APY, and choose the CD term. The calculator will immediately show your estimated ending balance, total interest, and a growth chart. You can also compare how different APY values change your result.

If your bank quotes a nominal rate instead, switch to Interest Rate mode and choose a compounding frequency. The rate and term comparison tables work in both modes, so you can see the impact of each input on your estimated return.

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