What does a vacuum cleaner cost to run?

A vacuum cleaner is a short-run appliance, and that single fact settles its place on your power bill. Even a powerful barrel or upright only operates for the few minutes to half an hour you are actually pushing it around the house. It draws decent power while it runs, but it runs for so little of the week that it barely registers on the bill.

The maths is the same story as the iron and the hair dryer. A high wattage over a tiny run time comes out to a tiny cost. Cleaning the whole house each week uses a trivial amount of energy compared with anything that heats a room or heats water, which is where the real money in a home goes.

Cordless stick vacuums use even less. Instead of a mains motor running at full tilt, they draw down a small battery and then simply recharge it between uses. The recharge is modest, and it happens quietly in the background off a wall socket, so you rarely notice it at all.

There is essentially nothing to optimise here for cost. Vacuuming more or less often will not show up on your bill in any meaningful way, so clean as much as the floors need without a second thought about the power it uses. Even the highest-wattage barrel vacuum, run for half an hour a week, costs only pennies across the whole year.

The only draw worth a passing thought is a robot or cordless vacuum that sits on its charging dock continuously. That trickle to keep a battery topped up runs all the time, day and night, rather than just during cleaning. It is still very small, well below the appliances that dominate a bill, but it is the one part of a vacuum's use that runs around the clock.

In short, this is one appliance where the running cost really does not matter. It earns its spot in the calculator mostly for comparison, so you can see how a high-wattage tool that runs briefly stacks up against a low-wattage one that never switches off. Pop your usage in if you like, but do not expect it to move the needle.