Your bill charges for energy (kWh), not for the watt rating printed on a sticker. Understanding that gap prevents both sticker shock and false precision.

Summing a few large loads explains only part of household usage. Always-on electronics, heating or cooling, and water heating often dominate. A home energy usage worksheet can combine a bill total with a few explicit appliances.

Pull the volumetric energy charge when you can. If the bill is complex, a blended rate (energy charges ÷ kWh) is a workable worksheet input—just remember fixed fees still exist.