Electricity Bill Calculator

The biggest consumers are typically: electric water heater (3,000–4,500 W), electric oven (2,000–5,000 W), air conditioner (1,000–4,000 W), electric dryer (5,000 W), dishwasher (1,200–2,400 W), and EV charger (1,500–7,200 W). Lighting has become much less significant since the switch to LED.

Electricity bills show total kWh consumed in the billing period, cost per kWh (unit rate), any standing charges (fixed daily or monthly fees), and taxes. Some utilities have tiered pricing where the rate increases after a threshold. Smart meters provide detailed hourly usage data to identify high-consumption periods.

LED bulbs use 75–80% less energy than incandescent bulbs. Replacing a 60 W incandescent with a 9 W LED running 4 hours per day saves 51 W × 4 hours = 204 Wh = 0.204 kWh per day = 74.5 kWh per year per bulb. At $0.25/kWh, that is about $18.60 saved per bulb per year.