Calculate your cost
Start with the example below, then replace the wattage, daily runtime, and rate with the numbers for your chest freezer.
This setup uses about 24 kWh in a 30-day month.
Please enter valid values within the ranges shown.
| Schedule | Hours/day | Cost/month |
|---|---|---|
| Half runtime | 4 | $2.26 |
| Page example | 8 | $4.52 |
| Longer runtime | 12 | $6.78 |
Same 100-watt input and 18.83¢/kWh rate; only runtime changes.
Formula for the page example
0.1 kW × 8 hr × $0.1883 = $0.15 per day
Convert watts to kilowatts, multiply by the active hours used each day, then multiply by the electricity price in dollars per kWh. Multiply the daily result by 30 for the monthly estimate shown above.
How to read this estimate
A chest freezer normally cycles on and off and loses relatively little cold air when the lid opens. A hot garage, heavy frost, or a worn seal can keep its compressor running much longer than the page example assumes.
Use this as a baseline until you can check the label or measure the chest freezer directly. Model, settings, condition, climate, and household routine can all change the result.
What changes the cost?
- 01
Freezer size, age, and compressor efficiency
- 02
Ambient temperature in a garage, basement, or utility room
- 03
Frost accumulation, lid seal, and thermostat setting
Ways to spend less
- Defrost when ice buildup becomes substantial.
- Keep the lid gasket clean and confirm it seals evenly.
- Place the freezer away from heat sources with room for ventilation.