How to use the Appliance Daily Cost
The Formula
kWh per day = (watts × hours) ÷ 1000. Daily cost = kWh × $/kWh. A 150 W device running 24 hours uses 3.6 kWh/day.
Practical Example
Check the nameplate, manual, or a plug-in power meter. Compressors and heaters cycle on and off—use average watts for fridges and AC.
About Appliance Daily Cost
Daily cost formula
kWh per day = (watts × hours) ÷ 1000. Daily cost = kWh × $/kWh. A 150 W device running 24 hours uses 3.6 kWh/day.
Find wattage
Check the nameplate, manual, or a plug-in power meter. Compressors and heaters cycle on and off—use average watts for fridges and AC.