Cost to Run a Aquarium (55 gallon, heater + filter + light) in Rhode Island
At Rhode Island’s April 2026 average residential rate of 28.30¢/kWh, a typical aquarium costs about $20.67 per month — or $248 per year.
Uses 2.4 kWh/day · 876 kWh/year.
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Formula: cost = watts × duty × hours/day × days/year × rate / 100 / 1000
About this appliance
A 55-gallon freshwater aquarium with heater, filter, and lighting. Heater duty cycle reflects climate.
This page uses Rhode Island’s residential average electricity price. Rhode Island households pay 50% more than the U.S. average of 18.83¢/kWh, so running the same aquarium in Rhode Island costs about $248/year, compared with the U.S. typical of $165/year.
Aquarium cost across other states
| State | Rate (¢/kWh) | Yearly cost |
|---|---|---|
| North Dakota | 12.35 | |
| Idaho | 12.70 | |
| Nebraska | 13.28 | |
| Utah | 13.29 | |
| Oklahoma | 13.31 | |
| Iowa | 13.86 | |
| Montana | 13.90 | |
| Missouri | 14.01 | |
| Arkansas | 14.16 | |
| Nevada | 14.29 | |
| Washington | 14.36 | |
| Rhode Island | 28.30 |
How to lower the cost of your aquarium in Rhode Island
- Measure actual draw with a kill-a-watt meter. Nameplate watts are often higher than real-world draw — a plug-in meter shows the true number.
- Unplug when not in use if the device has standby draw (chargers, set-top boxes, smart speakers, etc).
- Switch to time-of-use pricing if your utility offers it and your usage is shift-able.
Gear that helps
Tools and upgrades that pay back fastest for this appliance category. Affiliate links — we may earn a small commission at no cost to you.
- Kill-A-Watt plug-in meter — measure any appliance’s real draw
- Energy-monitoring smart plug
- Smart power strip — kill standby drain on a schedule
FAQ
How accurate is this estimate?
The calculation is exact for the given inputs. Real-world variation comes from your utility’s actual rate (which varies by plan and time-of-day), your specific appliance’s efficiency, and your usage pattern. Use the customize box above to plug in your own numbers.
Where does the 28.30¢/kWh come from?
It is the Rhode Island residential average from the U.S. Energy Information Administration’s Electric Power Monthly, Table 5.6.A (April 2026). See the methodology page.
How can I lower this cost?
Three high-impact moves: (1) shift heavy usage to off-peak hours if your utility offers time-of-use pricing; (2) switch to a more efficient unit (Energy Star); (3) reduce hours of use. For appliances with always-on standby draw, an inexpensive plug-in Kill-A-Watt meter often pays for itself by revealing surprise loads.