Calculate the Cost of Standby Power
Measure first, then turn watts and hours into a useful estimate.
The essentials
The US Department of Energy notes that apparently switched-off devices can still use electricity. Do not assume every appliance draws the same amount; consult product information and suitable measurement equipment.
Put it into practice
Use watts × hours ÷ 1,000 = kWh. A hypothetical constant 5W load over 24 hours for 30 days uses 3.6kWh. Apply your tariff, considering tiers, taxes and fixed charges separately. This is arithmetic, not a measured product claim.
What to check
List devices around one desk, their standby time and safe off-hours. Do not indiscriminately switch off essential medical, safety or communication equipment. Compare inconvenience with the likely saving.
