Watt does it cost?

The cost of electricity is significantly higher than in previous years due to the ongoing energy crisis, taking control of the appliances in your home is a great way to start saving energy and money.

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, and a fridge freeze won’t need to draw as much electricity once it has achieved the desired temperature.
To calculate how much each appliance uses per hour, we have assumed an electricity unit rate of 30p. This is roughly what the current standard variable tariff is sitting at as of July 2023 while covered by the Energy Price Cap.



kWh rating

Cost per hour

Electric shower 10,000 10 £3
Immersion Heater 3000 3 90p
Kettle 3000 3 90p
Tumble dryer 3000 3 90p
Electric Fire 2500 2.5 75p
Electric Oven 2000 2 60p
Oil Filled Radiator 2000 2 60p
Hairdryer 2000 2 60p
Grill/Hob 1500 1.5 45p
Dishwasher 1400 1.4 42p
Washing Machine 1400 1.4 42p
Iron 1400 1.4 42p
Air Fryer 1400 1.4 42p
Electric Mower 1300 1.3 39p
Vacuum cleaner 1200 1.2 36p
Toaster 1100 1.1 33p
Microwave 800 0.8 24p
Dehumidifier 700 0.7 21p
Towel Rail 500 0.5 15p
Plasma TV 450 0.45 14p
Fridge Freezer 400 0.4 12p
LCD TV 200 0.2 6p
Heated Blanket 150 0.15 5p
Freezer 150 0.15 5p
Desktop PC 150 0.15 5p
Games Console 150 0.15 5p
Fridge 100 0.12 4p
Slow Cooker 75 0.075 2p
Laptop (charging) 65 0.065 2p
TV Box (Satellite, Cable, Freeview etc) 40 0.04 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 30p.

This may look like the following:

2500 watts ÷ 1000 = 2.5 kWh

2.5 kWh x 0.30 = 75p


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