How to use this calculator
Refrigerators operate all day but their compressor cycles. Enter estimated active compressor hours—or use measured daily kWh—to avoid treating nameplate watts as a continuous 24-hour draw.
- Use running watts, not startup surge.
- Estimate compressor hours or back-calculate from a plug meter.
- Check door seals and temperatures first.
FORMULA
The math behind the estimate
running watts × active compressor hours ÷ 1,000 × rate = daily operating cost.
Worked example
A refrigerator averaging 150 W for eight active hours a day at $0.18/kWh costs about $79 per year.
Change the defaults to model your home. The result is an estimate, not a guaranteed bill or savings promise.
How to read the result
Use the estimate to compare scenarios and find the inputs worth measuring more carefully. Utility bills can include fixed charges, taxes, delivery fees, minimums, tiers, and demand charges that are not fully represented by a simple energy rate.
Assumptions and limitations
- Defrost heaters and fans are approximated through runtime.
- Room temperature and door openings affect cycling.
- Startup surge has little effect on billed kWh.
Climate, equipment condition, installation, controls, and household behavior can materially change results. Verify consequential installation and purchasing decisions with qualified providers.
Practical savings context
Set safe temperatures, leave airflow around coils, replace failed seals, and compare measured annual use with an ENERGY STAR model.
SOURCE
Data and methodology
Program information accessed August 2026. Geographic scope: United States. Last reviewed: August 6, 2026.
WattMeasure uses the source to frame the method and assumptions; your editable inputs determine the displayed result.
QUESTIONS
Refrigerator FAQ
How accurate is this refrigerator estimate?
It is a planning estimate based on the values you enter. Actual power draw, cycling, utility charges, climate, and equipment condition can change the result.
Should I use the default electricity rate?
Your own marginal or all-in supply rate is better. Check a recent bill or your utility's published rate schedule.
Does this include taxes and utility fees?
Only when they are reflected in the rate you enter. Fixed monthly charges are not included because they usually do not change with one appliance's usage.
Last reviewed August 6, 2026 · Data update policy