What does a hair straightener cost to run?

Run the numbers on your own use

Change any of these and the figures update. The defaults are the typical case described above; your rate is the input that moves the answer most.

Why this is lower than the number you will see elsewhere

Almost every published answer to this question multiplies the rating on the label by the hours the appliance is switched on. For a hair straightener that gives 11 kWh a year, or $2.06.

Thermostatic — the plates cycle to hold temperature once up to heat, which happens within a minute.

The arithmetic, step by step

Nothing here is hidden, so you can check it or change it. Working in the order the formula runs:

1. 150 W — what it draws while it is actually drawing. This is the rating on the plate.
2. × 50% — the share of its in-service time it is really pulling that. Thermostatic — the plates cycle to hold temperature once up to heat, which happens within a minute.
   That gives 75 W averaged across the hours it is on.
3. × 0.25 hours a day × 300 days — About fifteen minutes most mornings.
   75 × 0.25 × 300 ÷ 1,000 = 5.6 kWh a year.
4. × 18.34¢ — the US average residential rate for June 2026.
   5.6 kWh × 18.34¢ = $1.03 a year.

Change any assumption in the calculator above and every figure on this page moves with it. The two that matter most are your rate, which varies 4× across the country, and the hours — the duty cycle is a property of the appliance, but the hours are a property of you.

How sensitive is that number?

A single figure invites more confidence than it deserves. Here is the same appliance under assumptions either side of the default, so you can see how much of the answer is the appliance and how much is the guess about how you use it.

Everything else held at the default. The spread here is the honest error bar on the headline figure.

What it costs per hour, day and month

At 18.34¢ per kWh, the US residential average for June 2026.

The thing worth knowing

Far smaller than a hair dryer despite feeling similar, because it heats two small plates rather than a stream of air. The whole year costs less than a single cup of coffee. Worth knowing chiefly to stop people worrying about it — and to note the real risk is leaving one switched on, which is a fire question rather than an energy one.

What it costs in your state

The appliance is the same everywhere; the rate is not. Running this hair straightener costs $2.97 a year in Hawaii and $0.74 in Nevada — a difference of 4×.

Cost of running one hair straightener for a year, by state. Residential average price, EIA June 2026.

Other tools, hobbies and outdoors costs

• Crypto mining rig

  $4,820 a year

  A single ASIC unit running around the clock.

• Oxygen concentrator

  $375 a year

  A stationary home unit at a moderate flow rate, sixteen hours a day.

• Pottery kiln

  $190 a year

  A medium studio kiln fired roughly twice a month to cone 6.

• Electric fireplace

  $97 a year

  Evenings through winter with the heater on.

• Home server or NAS

  $96 a year

  A four-bay NAS running continuously.

• Radon mitigation fan

  $96 a year

  A typical sub-slab depressurisation fan running as installed.

Questions

Source: U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A, June 2026. U.S. Government work, public domain.

How every figure on this page is computed · Where the data comes from