Watt does it cost?

The cost of electricity increased by around 36% in April 2022 for those on standard variable tariffs. With no cheaper tariffs available right now, the best way to cut your electricity costs is to use your appliances more efficiently.
We’ve put together a list of some of the most common household appliances and calculated how much they’d cost to run for an hour.
Different models and brands of appliances will vary in their power consumption (wattage). We’ve made some assumptions about the average or most likely wattage of these appliances. It’s important to remember this table is a rough guide to what these will cost you.
We’ve also calculated assuming the appliance will use the ‘maximum‘ wattage for the entire hour, this is not always the case. For example with a washing machine, it will cycle through a programme which draws varying amounts of energy.
To calculate how much each appliance uses per hour, we have assumed an electricity unit rate of 28p. This is roughly what the current standard variable tariff is sitting at as of April 2022.



kWh rating

Cost per hour

Electric shower 10,000 10 £2.80
Immersion Heater 3000 3 84p
Kettle 3000 3 84p
Tumble Drier 3000 3 84p
Electric Fire 2500 2.5 70p
Electric Oven 2000 2 56p
Oil Filled Radiator 2000 2 56p
Hair Dryer 2000 2 56p
Grill/Hob 1500 1.5 42p
Dish Washer 1400 1.4 39p
Washing Machine 1400 1.4 39p
Iron 1400 1.4 39p
Air Fryer 1400 1.4 39p
Electric Mower 1300 1.3 36p
Vacuum cleaner 1200 1.2 34p
Toaster 1100 1.1 31p
Microwave 800 0.8 22p
Dehumidifier 700 0.7 19p
Towel Rail 500 0.5 14p
Plasma TV 450 0.45 13p
Fridge Freezer 400 0.4 11p
LCD TV 200 0.2 6p
Heated Blanket 150 0.15 4p
Freezer 150 0.15 4p
Desktop PC 150 0.15 4p
Games Console 150 0.15 4p
Fridge 100 0.12 3p
Slow Cooker 75 0.075 2.1p
Laptop (charging) 65 0.065 1.8p
TV Box (Satellite, Cable, Freeview etc) 40 0.04 1.1p
DVD Player 30 0.03 <1p
Tablet (charging) 10 0.01 <1p
LED Bulb 9 0.009 <1p
Router 7 0.007 <1p
Extractor Fan 5 0.005 <1p
Smart phone (charging) 2.5 0.0025 <1p

If you want to find out what your own appliances use, it’s actually quite easy. It’s something you can get the kids involved in too.

Each electrical item in your home will have a sticker, usually on the back or bottom which shows its wattage. You’re most likely to know this for your microwave, as the wattage means you need to vary cooking times.

Once you find the wattage you divide this (÷) by 1000 to get the kWh (kilo-Watt hour) rating. A kWh is the unit of measurement we use to record energy consumption. Each unit on your electricity meter will be 1 kWh.

Once you have the kWh rating you then multiply (x) this by your tariff cost, at the moment it’s likely to be around 28p.

This may look like the following:

2500 watts ÷ 1000 = 2.5 kWh

2.5 kWh x 0.28 = 70p


Get advice

If you’d like further advice on saving energy on running your appliances you can arrange a free and impartial advice call with one of the team.

Our energy advisors can be contacted by:

  • Calling 01592 807930
  • Texting COSY then YOUR NAME to 88440
  • Emailing info@cosykingdom.org.uk
  • Request advice online
  • On our Facebook and Twitter social media pages