What a vacuum cleaner actually draws
A corded upright or canister vacuum draws 1,000 to 1,440 W, which is DOE's listed range, with about 1,100 W typical. DTE's appliance chart puts a vacuum at 0.818 kWh per operating block. Unlike most high-wattage appliances, that draw is genuine and continuous while the machine runs — there is no thermostat cycling an element on and off, no compressor duty cycle. Squeeze the trigger and it pulls its rated power until you stop.
The wattage is also honest in a way that a microwave's or a power supply's is not: the motor really does consume close to its label. What makes the vacuum cheap is not the watts. It is the runtime.
Most households vacuum about an hour a week, which averaged out is roughly 0.15 hours a day — nine minutes. That is one of the shortest duty figures of any appliance in the house, and it drops the vacuum to the bottom of the bill despite it sounding, quite literally, like the most powerful thing you own.
Cordless stick vacuums work differently. They draw far less at the wall, typically 30 to 60 W while charging, because the battery smooths the demand out over hours instead of concentrating it in minutes. But they only run 20 to 60 minutes per charge, and — the part people miss — they keep drawing power sitting on the charging dock long after the battery is full.
What that costs, worked through
Watts × hours ÷ 1,000 = kWh per day. For a vacuum: 1,100 W × 0.15 hours = 165 watt-hours, or 0.165 kWh a day. Over a 30.4-day month that is 5.0 kWh, and at the US average rate of 18.44 cents per kWh, 5.0 × $0.1844 is about 92 cents a month — roughly $11.10 a year.
Priced by the session rather than the month, one continuous hour of vacuuming is 1.1 kWh, or about 20 cents. A quick fifteen-minute pass over the main rooms costs five cents. There is no realistic cleaning schedule that turns this into a meaningful number: vacuuming an hour every single day, seven days a week, would still cost only about $6.16 a month.
At the ends of the range the answer barely moves. A 1,000 W machine at the same runtime uses 4.6 kWh a month, about 84 cents. A 1,440 W machine uses 6.6 kWh, about $1.21. The gap between the weakest and the strongest vacuum on the market is roughly 37 cents a month.
This is the clearest illustration on the site of why nameplate wattage predicts nothing on its own. A vacuum draws about the same as a microwave and roughly 140 times what a WiFi router draws — and it costs less to run over a year than the router does, because the router never stops. Test the principle on your own appliances in the appliance energy cost calculator.
What makes the number move
Runtime dominates, and runtime is mostly a function of how well the machine works rather than how big the house is.
- Minutes of actual suction. The entire cost, essentially. Everything below is a way of changing this number.
- Airway condition. A full bin, a clogged filter or a blocked hose drops suction, and the practical consequence is that you go over the same carpet two or three times. That doubles or triples runtime, and with it the cost.
- Floor type. Deep carpet takes longer than hard floor for the same area, and a powered brush roll adds a little draw of its own.
- Motor rating. Real but small, at 37 cents a month across the whole range.
- Corded versus cordless. Changes the shape of the consumption entirely: a cordless model spreads a smaller amount of energy across hours of charging, plus whatever the dock draws when idle.
Robot vacuums are a separate case and sit somewhere between the two. They run far longer than a person would but at much lower power, and they return to a dock that keeps drawing.
Age is close to irrelevant here. Unlike a refrigerator, a vacuum has no efficiency standard to have improved against, and a well-maintained twenty-year-old canister uses about what a new one does per minute of work.
Whether it is worth doing anything about
Not for the electricity. At $11.10 a year, this appliance cannot be optimised into savings anyone will notice, and any advice framed as saving money on vacuuming is misplaced.
The maintenance advice is still worth following, but for the right reason. Empty the bin at half full and keep the filter clean. A clogged airway drops suction, and the real cost is not the watts — it is that you cover the same carpet two or three times to get it clean, doubling or tripling the runtime. You are spending your evening, not your money. The electricity saved is pennies; the time saved is not.
For cordless models there is one small, genuine action: take the vacuum off the charging dock once it is full, because the dock keeps trickling power indefinitely. Treat that as a directional point rather than a measured one — dock draw varies by model and is rarely published — but the arithmetic of always-on devices applies. Even 5 W left running permanently is 43.8 kWh a year, about $8.08, which would be comparable to the entire annual running cost of the corded vacuum it replaced.
What is not worth doing: choosing a vacuum by wattage to save energy, avoiding vacuuming to save money, or putting a corded vacuum on a switched outlet. Buy the machine that cleans your floors in the fewest passes. That decision saves time, and time is the only resource this appliance consumes in quantity.
How it compares with everything else you plug in
At 5.0 kWh a month, the vacuum is among the smallest loads in the house. It uses less than a WiFi router at 5.8 kWh, less than a single 60 W incandescent bulb at 5.5 kWh, less than a clothes washer at 6.1 kWh, and about half a microwave's 8.4 kWh.
The wattage comparisons run entirely the other way. A vacuum's 1,100 W matches a microwave, roughly doubles a window air conditioner's 900 W, and is 137 times a WiFi router's 8 W. Yet it costs less per year than any of them, because it operates nine minutes a day.
Against the big loads it disappears: about one-seventh of a refrigerator's 36.5 kWh, one-eleventh of an electric dryer's 54.7 kWh, and one-128th of a central air conditioner's 638.4 kWh in cooling season.
The general principle is the one worth carrying to every other page on this site. Cost is wattage multiplied by hours, and hours usually win. The appliances that dominate a bill are the ones that run for a long time — refrigerators, water heaters, air conditioners, routers — not the ones that make the most noise. If your bill has jumped and you are working through the possibilities, skip this category entirely and read why your electric bill is so high, or check your own rate in the kWh cost calculator.
Frequently asked questions
How many watts does a vacuum cleaner use?
Between 1,000 and 1,440 watts for a corded upright or canister, with about 1,100 watts typical — that is DOE's listed range, and DTE's chart puts a vacuum at 0.818 kWh per operating block. The draw is continuous while the motor runs, with no cycling. Cordless stick vacuums are different: they pull only 30 to 60 watts at the wall while charging, spreading a smaller amount of energy across hours rather than concentrating it into minutes of high demand.
How much does it cost to run a vacuum cleaner?
About 92 cents a month, or roughly $11.10 a year, at the US average rate of 18.44 cents per kWh. The arithmetic: 1,100 watts for about 0.15 hours a day — the average of an hour a week — is 0.165 kWh, which is 5.0 kWh over a 30.4-day month. A single continuous hour of vacuuming costs about 20 cents, and a quick fifteen-minute pass about five. Even vacuuming an hour every day would only reach about $6.16 a month.
Do cordless vacuums use less electricity?
Per session, yes — a cordless model draws 30 to 60 watts at the wall while charging rather than 1,100 watts while running, and it only operates 20 to 60 minutes per charge. The catch is the dock, which keeps trickling power indefinitely once the battery is full. Any device that draws even a few watts around the clock accumulates: 5 watts permanently is 43.8 kWh and about $8.08 a year, comparable to the entire annual cost of running a corded vacuum. Take it off the dock when charged.
Does a higher-wattage vacuum cost more to run?
Only marginally, and it may cost less overall. Across the whole 1,000 to 1,440 watt range, the difference is about 37 cents a month at typical usage. If a more powerful machine cleans the same floor in fewer passes, it can finish in less time and use less total energy than a weaker one you have to run over the carpet three times. Choose a vacuum by how well it cleans, not by its wattage — the electricity difference is far too small to be worth trading suction for.