Cost per hour = watts ÷ 1,000 × your price per kWh. A 1,000 W appliance running for one hour uses 1 kWh. The table below applies that sum to typical household appliances at the price you enter, so you can see which ones matter before you open a calculator.

Showing 47 appliances at 0.20 USD per kWh. Enter your own price above or set it in Market & tariff.

ApplianceTypical powerCost per hour or useCost per month
Kitchen
Electric kettle (boiling)0.25 h per day. About five short boils a day. A full 1-litre boil is roughly 0.1 kWh.2200 W (1500–3000 W)$0.44per hour$3.35at typical use
Microwave oven0.3 h per day. Electrical input is higher than the advertised cooking power.1200 W (800–1800 W)$0.24per hour$2.19at typical use
Air fryer0.6 h per day. Draws full power while heating, then cycles; average over a cook is lower.1400 W (1000–2000 W)$0.28per hour$5.11at typical use
Electric oven (average while in use)1 h per day. Thermostat cycling: the element is not on all the time. Rated power is higher.1500 W (1000–2500 W)$0.30per hour$9.13at typical use
Electric hob, one ring0.75 h per day. Average at a medium setting.1500 W (1000–2200 W)$0.30per hour$6.84at typical use
Slow cooker7 h per day. Long, low-power cooking.200 W (150–300 W)$0.040per hour$8.52at typical use
Toaster0.1 h per day. Short bursts.900 W (700–1200 W)$0.18per hour$0.55at typical use
Espresso machine0.3 h per day. Heating-up time counts as use; some models keep warm in standby.1200 W (900–1500 W)$0.24per hour$2.19at typical use
Rice cooker0.5 h per day500 W (300–700 W)$0.10per hour$1.52at typical use
Dishwasher (eco cycle)5 uses per week. Per cycle. Check the energy label for your model; hot-fill supply can lower the figure.1 kWh per use (0.7–1.5)$0.20per use$4.33at typical use
Laundry
Washing machine (40 °C cycle)4 uses per week. Per cycle. Cold and eco cycles use less; 60 °C and above use more.0.8 kWh per use (0.4–1.5)$0.16per use$2.77at typical use
Tumble dryer (condenser or vented)2 uses per week. Per cycle for a full load.3.5 kWh per use (2.5–5)$0.70per use$6.07at typical use
Tumble dryer (heat pump)2 uses per week. Per cycle for a full load.1.4 kWh per use (0.9–2)$0.28per use$2.43at typical use
Steam iron0.15 h per day. Cycles on and off with its thermostat.1800 W (1000–2400 W)$0.36per hour$1.64at typical use
Heating & cooling
Fan heater3 h per day. Draws close to its rating until the room is warm.2000 W (1000–3000 W)$0.40per hour$36.50at typical use
Oil-filled radiator (average)4 h per day. Rated near 2000 W, but the thermostat cycles it. Average depends on the room.1000 W (700–1500 W)$0.20per hour$24.33at typical use
Panel or convector heater (average)4 h per day. Thermostat cycling lowers the average.1000 W (500–2000 W)$0.20per hour$24.33at typical use
Heated towel rail5 h per day150 W (100–300 W)$0.030per hour$4.56at typical use
Electric blanket3 h per day. Preheating draws more than the low setting. Follow the maker’s instructions.100 W (60–200 W)$0.020per hour$1.83at typical use
Portable air conditioner6 h per day. Runs when it is hot; compressor cycles.1100 W (800–1500 W)$0.22per hour$40.15at typical use
Window air conditioner6 h per day. Seasonal use; see the label for the EER.900 W (500–1500 W)$0.18per hour$32.85at typical use
Mini-split heat pump (average)6 h per day. Output varies widely with weather and setting.800 W (300–2500 W)$0.16per hour$29.20at typical use
Pedestal or ceiling fan8 h per day50 W (30–75 W)$0.010per hour$2.43at typical use
Dehumidifier (compressor)8 h per day. Cycles with a humidistat; desiccant models draw more.280 W (200–400 W)$0.056per hour$13.63at typical use
Air purifier12 h per day. Speed setting drives power.40 W (10–90 W)$0.008per hour$2.92at typical use
Humidifier (ultrasonic)8 h per day. Evaporative or warm-mist models draw far more.30 W (20–50 W)$0.006per hour$1.46at typical use
Hot water
Electric shower0.25 h per day. Power is the unit’s rating; only runs while water flows.8500 W (7000–10500 W)$1.70per hour$12.93at typical use
Immersion heater (while heating)2 h per day. Thermostat cuts out when the tank is hot.3000 W (2000–3000 W)$0.60per hour$36.50at typical use
Entertainment & computing
LED TV, 55 inch4 h per day. Brightness and HDR raise it.90 W (50–150 W)$0.018per hour$2.19at typical use
Games console (playing)2 h per day. Depends on the console and game.150 W (60–220 W)$0.030per hour$1.83at typical use
Desktop PC (typical use)5 h per day. Gaming load can be far higher.150 W (60–400 W)$0.030per hour$4.56at typical use
Laptop (charging and use)6 h per day45 W (20–90 W)$0.009per hour$1.64at typical use
Computer monitor6 h per day25 W (15–45 W)$0.005per hour$0.91at typical use
Set-top box or streamer4 h per day. Some boxes draw nearly as much in standby.15 W (5–30 W)$0.003per hour$0.37at typical use
Phone charging3 h per day6 W (2–20 W)$0.001per hour$0.11at typical use
Lighting
LED bulb4 h per day9 W (5–15 W)$0.002per hour$0.22at typical use
Halogen bulb4 h per day. Being phased out in many markets.42 W (28–70 W)$0.008per hour$1.02at typical use
Incandescent bulb4 h per day. Mostly withdrawn from sale; still found in older fittings.60 W (40–100 W)$0.012per hour$1.46at typical use
Home & garden
Hair dryer0.15 h per day1800 W (1000–2200 W)$0.36per hour$1.64at typical use
Vacuum cleaner (corded)0.2 h per day1000 W (600–2000 W)$0.20per hour$1.22at typical use
Pool pump8 h per day. Variable-speed pumps use much less.750 W (400–1500 W)$0.15per hour$36.50at typical use
Electric lawn mower0.5 h per day. Seasonal use.1000 W (600–1600 W)$0.20per hour$3.04at typical use
Home EV charger (7 kW)2 h per day. See the EV charging calculator for a full session.7000 W (3600–11500 W)$1.40per hour$85.17at typical use
Always on
Fridge-freezer (24-hour average)Averaged over 24 hours. Average of the compressor cycling; check the label’s kWh per year ÷ 8,760.40 W (25–70 W)$0.008per hour$5.84at typical use
Chest freezer (24-hour average)Averaged over 24 hours35 W (25–60 W)$0.007per hour$5.11at typical use
Wi-Fi routerAveraged over 24 hours10 W (5–20 W)$0.002per hour$1.46at typical use
Hot tub (24-hour average)Averaged over 24 hours. Strongly climate and cover dependent; see the hot tub calculator.170 W (80–300 W)$0.034per hour$24.82at typical use

How to use these figures

  • Treat the watts as a starting point. They are rounded planning values, not measurements of any product. Your nameplate, energy label or a plug-in meter beats this table.
  • Thermostat appliances cycle. Heaters, ovens and air conditioners draw their rating only while the element or compressor is on, so the average is lower than the label.
  • Per-use appliances (washer, dryer, dishwasher) are priced per cycle because running hours would mislead. Use your model’s label figure when you have it.
  • Monthly costs assume the stated daily use. Change the hours in the power and time calculator, or add several appliances to the household planner to see which one costs most.

Where the figures come from

Typical values are rounded planning figures compiled by Watt & Home from the kinds of nameplate, label and regulator data listed below. They are not quoted from one source and not measured on specific products. The table was last reviewed on 2026-10-26. Read the editorial policy for how figures are checked, or report a number that looks wrong.

Sources and product documents