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How much does a toaster cost to run?

A toaster typically draws around 1000 W while running. Ratings vary widely between models, so check the label and change the figure below.

per kWh
W
g CO2 per kWh
Cost per year
12.66
= Exact Running cost of a toaster
Cost per month
1.06
Cost per day
0.03
Cost per hour of use
0.28
Energy per year
45.2 kWh
Energy per day
0.1239 kWh
Carbon dioxide per year
11.3
Annual cost of standby alone
2.44
Show the working
  1. Power = 1000
  2. Hours per day = 0.1
  3. Days per year in use = 365
  4. Electricity price = 0.28
  5. Standby power = 1
  6. Grid carbon intensity = 250
  7. kw = 1000 / 1000 = 1
  8. daily_kwh = 1 * 0.1 = 0.1
  9. standby_kwh = 1 / 1000 * (24 - 0.1) = 0.0239
  10. Energy per day = 0.1 + 0.0239 = 0.1239
  11. Energy per year = 0.1239 * 365 = 45.2235
  12. Cost per day = 0.1239 * 0.28 = 0.034 692
  13. Cost per year = 45.2235 * 0.28 = 12.6626
  14. Cost per month = 12.6626 / 12 = 1.055 22
  15. Cost per hour of use = 1 * 0.28 = 0.28
  16. Carbon dioxide per year = 45.2235 * 250 / 1000 = 11.3059
  17. Annual cost of standby alone = 0.0239 * 365 * 0.28 = 2.442 58

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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    The formula

    • daily energy = power in kW x hours
    • annual cost = daily energy x days x price per kWh

    Nameplate wattage is the maximum draw, not the average. A cycling appliance like a fridge or a freezer averages far less.

    Standby draw is small per device and adds up across a house: ten devices at 2 W each is 175 kWh a year.

    Running cost of a toaster at different tariffs

    Price per kWh Per hour Per year at 0.1 h/day
    0.10 0.10003.65
    0.15 0.15005.47
    0.20 0.20007.30
    0.25 0.25009.13
    0.30 0.300010.95
    0.40 0.400014.60

    Frequently asked

    How many watts does a toaster use?

    Typically around 1000 W while running, though models vary. Check the rating plate.

    How much electricity does it use per day?

    About 0.10 kWh at 0.1 hours of use.

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