How much does a chest freezer cost to run?
A chest freezer typically draws around 200 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
165.16
- Cost per month
- 13.76
- Cost per day
- 0.45
- Cost per hour of use
- 0.06
- Energy per year
- 589.8 kWh
- Energy per day
- 1.6160 kWh
- Carbon dioxide per year
- 147.5
- Annual cost of standby alone
- 1.64
Show the working
- Power = 200
- Hours per day = 8
- Days per year in use = 365
- Electricity price = 0.28
- Standby power = 1
- Grid carbon intensity = 250
- kw = 200 / 1000 = 0.2
- daily_kwh = 0.2 * 8 = 1.6
- standby_kwh = 1 / 1000 * (24 - 8) = 0.016
- Energy per day = 1.6 + 0.016 = 1.616
- Energy per year = 1.616 * 365 = 589.84
- Cost per day = 1.616 * 0.28 = 0.452 48
- Cost per year = 589.84 * 0.28 = 165.155
- Cost per month = 165.155 / 12 = 13.7629
- Cost per hour of use = 0.2 * 0.28 = 0.056
- Carbon dioxide per year = 589.84 * 250 / 1000 = 147.46
- Annual cost of standby alone = 0.016 * 365 * 0.28 = 1.6352
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 chest freezer at different tariffs
| Price per kWh | Per hour | Per year at 8 h/day |
|---|---|---|
| 0.10 | 0.0200 | 58.40 |
| 0.15 | 0.0300 | 87.60 |
| 0.20 | 0.0400 | 116.80 |
| 0.25 | 0.0500 | 146.00 |
| 0.30 | 0.0600 | 175.20 |
| 0.40 | 0.0800 | 233.60 |
Frequently asked
How many watts does a chest freezer use?
Typically around 200 W while running, though models vary. Check the rating plate.
How much electricity does it use per day?
About 1.60 kWh at 8 hours of use.
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