Appliance Energy Cost Calculator
Plug in any appliance's wattage and runtime to see what it costs per day, month, and year.
Enter your details
Check the nameplate, label, or manufacturer's spec.
Per day
$0.07
Per week
$0.48
Per month
$2.06
Per year
$25
146 kWh
What this means
Cost = Watts × Hours ÷ 1000 × $/kWh. A 100 W device left on 24/7 costs about $150/year at average US rates.
"Phantom" loads from idle electronics (TVs, set-top boxes, chargers) typically total 5-10% of a household's electric bill — small wattages add up over 8,760 hours a year.
How to lower this cost
- Use a smart plug with energy monitoring to find which devices actually run the most.
- Switch big-watt appliances (heaters, hair tools, coffee pots) to short-run schedules.
- Consolidate phantom loads onto switched power strips.
- Replace incandescent bulbs with LEDs (10× lower wattage for the same light).
Next step
Find your biggest single waste
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Results are estimates based on typical conditions. Actual costs vary by climate, utility rates, equipment efficiency, and home characteristics. Use them as a starting point — for precise figures consult a qualified energy auditor or your utility company. Estimates are not a guarantee, and any work you do on your home is at your own risk — we are not liable for installation errors or property damage. Air sealing a home with gas, oil, propane, or wood-burning appliances can cause backdrafting and carbon monoxide risk — get a combustion safety test and keep CO alarms working. See our Disclaimer.