Freezer Energy Cost Calculator
This calculator estimates a freezer’s energy usage by applying a duty-cycle assumption to its compressor running power. It helps compare scenarios, but actual consumption should be measured where possible.
How to use this calculator
- Enter compressor-on power and a duty cycle as a percentage from 0 to 100.
- Check that the input values use the same units and reporting period before comparing scenarios.
- Change one assumption at a time to see which input drives the result.
Formula and method
Energy (kWh) = running power (W) / 1,000 × duty cycle × hours per day × days.
- 0.125 kW × 0.45 × 24 × 30 = 40.5 kWh.
- Rated power and duty cycle may vary with ambient temperature, door openings, load and appliance condition. Use the supplier tariff and measured data for a bill comparison.
Worked examples
Worked example
A freezer draws 125 W while running and has an assumed 45% duty cycle over 30 days, running 24 hours per day.
0.125 kW × 0.45 × 24 × 30 = 40.5 kWh.
The modeled 30-day use is 40.5 kWh.
Understanding the result
The modeled 30-day use is 40.5 kWh.
Rated power and duty cycle may vary with ambient temperature, door openings, load and appliance condition. Use the supplier tariff and measured data for a bill comparison.
Important notes
Enter compressor-on power and a duty cycle as a percentage from 0 to 100.
The displayed result uses the entered assumptions; validate important estimates against source measurements, specifications or qualified guidance.
Frequently asked questions
Is the duty cycle the same as efficiency?
No. It is the fraction of time the compressor runs in this simple model.
Does this include standing charges?
No. It calculates usage-based cost only.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.