What Uses the Most Electricity in Your Home?
If you want to cut your bill, you first need to know where the power actually goes. The pattern is remarkably consistent across homes: anything that makes heat or cold dominates, and everything else is comparatively small.
The simple rule: heat and cold cost the most
Converting electricity into temperature — heating air, cooling air, or heating water — takes a lot of energy. That’s why the biggest line items are almost always heating, air conditioning, water heating, and major kitchen and laundry appliances.
The typical pecking order
1. Space heating & cooling
Electric heaters, heat pumps and air conditioners usually top the list. Even a single 1,500 W space heater run for hours a day can rival everything else combined — see the space heater and air conditioner calculators.
2. Water heating
Showers, baths and hot taps add up fast, especially with an electric shower (often 8–10 kW). Size it with the water heating cost calculator or the electric shower calculator.
3. Major appliances: dryer, oven, dishwasher
High-power appliances used regularly are next. Check yours with the tumble dryer, oven and dishwasher calculators.
4. Always-on appliances: fridge & freezer
Individually modest, but they never switch off, so they accumulate. See the refrigerator and freezer calculators.
5. Electronics & lighting
TVs, computers and lighting usually come lower down — though a big TV or gaming PC for hours a day still counts. Compare with the TV calculator and consider switching to LEDs with the LED savings calculator.
How to find your biggest users
Your home isn’t average, so measure it. The quickest way is the appliance running cost calculator: enter each device’s wattage and usage to rank them by yearly cost. A plug-in energy monitor makes this even more accurate for things that cycle on and off.
The takeaway
Don’t sweat the phone chargers. Focus on heat, cold, hot water and the appliances you use most — that’s where 80% of your bill lives, and where saving effort pays off. Use the calculators above to turn “probably expensive” into an actual number.