Appliance running costs

Cost to run a freezer (chest or upright)

A freezer does not draw its rated power continuously in most homes. This page applies that behaviour — cycling operation at 40% duty — and shows every step of the arithmetic.

How much does a 120 W freezer cost to run?

A 120 W freezer switched on 24 hours per day at 40% duty cycle uses 1.15 kWh of electricity per day. At $0.180/kWh that is $0.21 per day, about $6.31 per average month and $75.74 per year — 421 kWh over the year. Those figures assume a typical wattage and a typical usage pattern; change any input below to match your own appliance and tariff.

Your inputs

Typical example — replace this 120 W default with your appliance’s actual rating for a better estimate.

This appliance cycles — typical range around 40%.

No effect at 24 h/day: there are no switched-off hours. Include a continuous idle load in the duty cycle instead.

Use the total variable rate from your bill, including delivery charges per kWh.

Scenario: hours per day

$6.31

per month (30.44-day average month)

1.15 kWh per day at 120 W

Estimate using typical assumptions
Per day
$0.21
kWh / month
35
kWh / year
421
Per year
$75.74

Average power across 24 hours

48 W

Daily energy spread evenly over 24 hours. Includes standby draw during switched-off hours when entered.

Cost per running hour

$0.009

While the appliance is actually drawing power.

Effective duty cycle

40%

Share of switched-on time at rated power.

Method

  1. 120 W = 0.12 kW
  2. 0.12 kW × 24 h/day × 40% duty = 1.152 kWh/day active
  3. 1.152 kWh × 0.18 USD/kWh = 0.207 USD/day
  4. 0.207 × 30.436875 days = 6.311 USD/month
  5. 1.152 kWh × 365.2425 days = 420.759 kWh/year
  6. 420.759 kWh × 0.18 USD/kWh = 75.737 USD/year

Monthly figures use a 30.44-day average month, 365.24-day average year.

Assumptions

  • Electricity rate of 0.18 USD/kWh (editable).
  • Calculations use a year of 365.2425 days and an average month of 365.2425 ÷ 12 = 30.436875 days, so twelve average months equal one year exactly. Displayed values are rounded to 365.24 and 30.44 days, and the rounded figures do not multiply out exactly.
  • Duty cycle of 40% — the appliance draws rated power for that share of the time it is switched on.
  • Rated power is treated as real power in watts, not volt-amps.

What can change the result?

  • Chest versus upright, and frost-free versus manual defrost
  • Ambient temperature where the freezer sits
  • How full the freezer is kept
  • Setpoint temperature

$6.31/mo · 35 kWh/mo

How a freezer actually draws power

A freezer cycles like a refrigerator but holds a much larger temperature difference against the room, so its compressor typically runs a slightly larger share of the time. Chest freezers hold cold air when opened and generally cycle less than upright models. A full freezer also cycles less than an empty one, because the frozen mass itself stores cold.

Use the duty cycle field to reflect your freezer's location: a garage freezer in a hot summer cycles far more than one in a cool basement. Chest models sit at the lower end of the range, frost-free uprights at the higher end because the defrost heater adds periodic load.

Chest freezer vs upright freezer: watts and electricity

There is no single freezer wattage. While the compressor runs, a household freezer typically draws somewhere around 60–250 W, but it only runs part of the time. Chest freezers keep cold air in when the lid opens and are usually manual-defrost, so they tend to use less energy than upright models of similar size. Frost-free uprights add a defrost heater that runs periodically. The yellow EnergyGuide label gives the model's estimated yearly kWh, which already includes cycling.

Cost per hour is for the compressor running continuously. Daily and yearly figures depend on the duty cycle — keep it at 25–45% unless you have measured otherwise, and prefer the label's yearly kWh when you have it.
TypeTypical wattsCost per hour at full power ($0.180/kWh)Basis
Chest freezer (manual defrost)about 60–150 W while running$0.018 at 100 WIllustrative; usually the lowest-energy type
Upright freezer, manual defrostabout 80–180 W while running$0.022 at 120 WIllustrative range
Upright freezer, frost-freeabout 100–250 W while running$0.027 at 150 WIllustrative; plus periodic defrost-heater bursts

Cost at different usage patterns

All rows use 120 W at 40% duty and $0.180/kWh. Only the hours change.

Generated by the same energy engine that powers the calculator above.
Hours per daykWh per dayPer dayPer monthPer year
12 h/day0.576 kWh$0.10$3.16$37.87
18 h/day0.864 kWh$0.16$4.73$56.80
24 h/day1.15 kWh$0.21$6.31$75.74

Cost across the typical wattage range

Units in this category typically range from 60 W to 250 W. All rows use 24 h/day at 40% duty.

Source for the range: Compressor input power of chest and upright household freezers (2026-01).
Power ratingkWh per dayPer dayPer monthPer year
60 W0.576 kWh$0.10$3.16$37.87
120 W1.15 kWh$0.21$6.31$75.74
250 W2.40 kWh$0.43$13.15$157.78

The decision that changes this cost: move it from a hot garage to a cool basement

A freezer's duty cycle tracks the temperature of the room it stands in. Moving the same unit from a garage that hits 30°C in summer to a basement at 15°C can drop the compressor's running share from around 40% to around 28%.

Both rows computed by the same engine at $0.180/kWh — only the change described above differs.
ScenariokWh per yearCost per year
Freezer as defaulted above421$75.74
Move it from a hot garage to a cool basement295$53.02 — saves $22.72/yr (126 kWh)

Where a freezer sits in the home

Ranked by annual running cost at each appliance's default usage pattern, this freezer is number 9 of 16 in the SnapEnergyLab catalogue — $75.74 per year at $0.180/kWh. The appliances either side of it:

Every appliance at its own default wattage, hours and duty cycle, same engine, same rate.
RankAppliancekWh per yearCost per year
#8Refrigerator460$82.84
#9Freezer (this page)421$75.74
#10Electric oven332$59.76

Worth knowing

Frost-free models include a defrost heater of several hundred watts that runs periodically.

Worth knowing

A freezer in an unheated garage may run far outside its designed ambient range.

Your next decision

Your next decision

Other appliance running costs

Electricity cost tools

Defaults on this page come from the published default registry and the formulas are documented in the methodology.