How much does it cost to run a aquarium?

Typical wattage

50–1,210 W

Cost per hour

$0.01–$0.22

at 18.16¢/kWh (US avg)

Energy per hour

0.05–1.21 kWh

A aquarium typically draws 50–1,210 W. At the US average residential rate of 18.16¢ per kWh (12-month average to August 2026), that is about $0.01–$0.22 for every hour it runs at full power.

Wide range reflects tank size and equipment such as heaters, lights and filters.

Cost per day and per month

Use per day	kWh per day	Cost per day	Cost per month
1 hour	0.05–1.21	$0.01–$0.22	$0.28–$6.68
2 hours	0.10–2.42	$0.02–$0.44	$0.55–$13.37
4 hours	0.20–4.84	$0.04–$0.88	$1.10–$26.74
8 hours	0.40–9.68	$0.07–$1.76	$2.21–$53.47

Scenarios show full-power hours. Appliances with thermostats or cycling compressors draw full power for only part of the time they are switched on.

Cost per hour by state

State	Rate (12-mo)	Cost per hour
Alabama	16.44¢	$0.01–$0.20
Alaska	26.94¢	$0.01–$0.33
Arizona	15.39¢	$0.01–$0.19
Arkansas	13.57¢	$0.01–$0.16
California	32.34¢	$0.02–$0.39
Colorado	17.17¢	$0.01–$0.21
Connecticut	27.42¢	$0.01–$0.33
Delaware	17.98¢	$0.01–$0.22
District of Columbia	24.48¢	$0.01–$0.30
Florida	15.41¢	$0.01–$0.19
Georgia	15.17¢	$0.01–$0.18
Hawaii	44.27¢	$0.02–$0.54
Idaho	12.77¢	$0.01–$0.15
Illinois	18.91¢	$0.01–$0.23
Indiana	16.90¢	$0.01–$0.20
Iowa	14.20¢	$0.01–$0.17
Kansas	15.13¢	$0.01–$0.18
Kentucky	13.94¢	$0.01–$0.17
Louisiana	13.02¢	$0.01–$0.16
Maine	29.60¢	$0.01–$0.36
Maryland	21.18¢	$0.01–$0.26
Massachusetts	30.39¢	$0.02–$0.37
Michigan	21.28¢	$0.01–$0.26
Minnesota	16.28¢	$0.01–$0.20
Mississippi	14.85¢	$0.01–$0.18
Missouri	13.97¢	$0.01–$0.17
Montana	13.94¢	$0.01–$0.17
Nebraska	12.74¢	$0.01–$0.15
Nevada	13.45¢	$0.01–$0.16
New Hampshire	26.95¢	$0.01–$0.33
New Jersey	23.74¢	$0.01–$0.29
New Mexico	16.51¢	$0.01–$0.20
New York	28.60¢	$0.01–$0.35
North Carolina	14.79¢	$0.01–$0.18
North Dakota	12.35¢	$0.01–$0.15
Ohio	18.41¢	$0.01–$0.22
Oklahoma	13.81¢	$0.01–$0.17
Oregon	15.53¢	$0.01–$0.19
Pennsylvania	20.86¢	$0.01–$0.25
Rhode Island	29.44¢	$0.01–$0.36
South Carolina	15.77¢	$0.01–$0.19
South Dakota	14.28¢	$0.01–$0.17
Tennessee	13.61¢	$0.01–$0.16
Texas	15.98¢	$0.01–$0.19
Utah	13.26¢	$0.01–$0.16
Vermont	23.90¢	$0.01–$0.29
Virginia	16.64¢	$0.01–$0.20
Washington	14.20¢	$0.01–$0.17
West Virginia	15.53¢	$0.01–$0.19
Wisconsin	18.79¢	$0.01–$0.23
Wyoming	14.01¢	$0.01–$0.17

Calculate with your own numbers

Frequently asked questions

How many watts does a aquarium use?

A typical aquarium uses 50–1,210 W, according to Virginia Cooperative Extension. Check the label on your model.

How much does it cost to run a aquarium per hour?

About $0.01–$0.22 per hour at full power, at the US average rate of 18.16¢ per kWh.

How much does it cost to run a aquarium for a month?

Running it 1 hour a day at full power costs about $0.28–$6.68 a month at the US average rate. Your cost depends on your hours and your state's rate.

How many kWh does a aquarium use?

About 0.05–1.21 kWh per hour at full power (watts ÷ 1,000).

How can I find my aquarium's exact wattage?

Check the rating label or manual, or measure it with a plug-in electricity usage meter, which shows real watts and kWh.

Rates: EIA, 12-month residential average. Cost = watts × hours ÷ 1,000 × rate (US Department of Energy method).

Sources

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