Household electricity usage is measured in kilowatt-hours (kWh) and is influenced by the home’s size, number of occupants, weather, appliances and heating or cooling habits. On your bill, compare the kWh used across billing periods and check whether the reading is actual or estimated. High-use appliances commonly include air conditioners, electric hot-water systems, heaters, clothes dryers and pool pumps, so monitoring or reviewing these can help identify patterns. A smart meter or an energy monitor may provide more detail, while your retailer can explain bill data and available usage tools.