Kitchen Appliances
A mini fridge averaging 90 watts for 8 active hours costs about $0.13 per day at $0.18 per kWh.
Quick estimate
This uses 90 watts, 8 hours per day, and an electricity rate of $0.18 per kWh.
Small fridges cycle like full-size refrigerators, but older compact models can be surprisingly inefficient.
Many mini fridge units fall around 90 watts, with a rough range of 50 to 150 watts. Check the product label, user manual, or manufacturer specifications for the most accurate number.
| Estimate | Watts | Hours per day | Daily cost | Monthly cost |
|---|---|---|---|---|
| Low estimate | 50W | 4 | $0.04 | $1.08 |
| Typical use | 90W | 8 | $0.13 | $3.89 |
| High estimate | 150W | 12 | $0.32 | $9.72 |
A mini fridge is a cycling compressor load, and compact models vary widely in insulation and controls. A freezer compartment, warm room, restricted ventilation, or frequent door openings can raise consumption.
Wattage input
Use annual kWh or multi-day measured energy when possible. The compressor's rated watts multiplied by a full day usually exaggerates use because the motor switches off between cooling calls.
Runtime input
Estimate compressor-on hours or derive an average from a plug-in meter. Give a newly installed fridge time to reach temperature before using its first few hours as a normal baseline.
Convert watts to kilowatts, multiply by the number of hours used, then multiply by your electricity rate.
Cost = Watts / 1000 x Hours Used x Electricity RateFor this mini fridge example: 90 / 1000 x 8 x 0.18 = $0.13 per day.
These details make this estimate more useful for real-world use.
A mini fridge uses less total power than many full-size refrigerators, but compact models can vary widely. Older dorm-style units may run often if insulation is weak or airflow around the back is blocked.
Because a mini fridge cycles on and off, enter the estimated active cooling time rather than 24 hours at full wattage. Warmer rooms, frequent door openings, and very cold settings all increase that active time.
Leave airflow around the back and avoid the coldest setting unless needed.
The easiest way to improve the estimate is to replace the default values with your actual wattage, average runtime, and local electricity rate.
Wattage ranges are practical planning estimates for common household appliances. Actual use can differ by model, age, settings, room conditions, and maintenance.
These authoritative sources support the calculation method, default electricity-rate benchmark, and appliance-specific operating context. The wattage range remains a planning estimate; use the nameplate on your own appliance for the most accurate input.
Used to benchmark the rounded default residential electricity rate. Your utility bill remains the best source for your own rate.
Supports the watts-to-kWh calculation method and the recommendation to check the appliance nameplate or use a power meter.
Provides efficiency and annual energy-use context for full-size and compact refrigerators.
It can on a per-volume basis, and some older compact units consume surprisingly high energy. Compare annual kWh labels rather than assuming physical size determines operating cost.
A mini fridge averaging 90 watts for 8 active hours costs about $0.13 per day at $0.18 per kWh.
Use the wattage printed on the appliance label when possible. As a starting estimate, this page uses 90 watts and shows a common range of 50 to 150 watts.
Electricity bills include many appliances, fees, taxes, seasonal changes, and utility rate structures. This calculator estimates appliance energy cost only.
Compare similar appliances in the same category.
Keep comparing by category or jump to another common household appliance.
These calculators help compare other appliances that often show up on home electricity bills.
Use these guides to understand the formula, wattage, rates, and ways to lower appliance costs.