Electricity Cost Calculator

How to Read Your Electric Bill

Your electricity bill charges in kilowatt-hours (kWh) — 1 kWh is using 1,000 watts for one hour. A 100-watt light bulb running for 10 hours uses 1 kWh. The rate you pay per kWh varies by location: US averages around $0.16/kWh, but Hawaii exceeds $0.40 and parts of the South dip below $0.10. Most bills also include fixed charges (service fees, distribution fees) that appear regardless of usage — these can add $10–$30 to any monthly bill before you use a single watt. Understanding this split helps you estimate accurately: variable costs respond to conservation, fixed costs don't.

Phantom Load: The Silent Drain

Phantom load (also called standby power) is electricity consumed by devices when they're turned off but still plugged in. The average US home wastes 5–10% of its electricity this way — around $100–$200 per year. The worst offenders: cable boxes and DVRs (15–20W always on), game consoles (1–2W in standby but often 150W+ if left "on"), desktop computers left in sleep mode, and chargers drawing current even without a device connected. Smart power strips that cut power when a primary device is off can eliminate phantom load for entire entertainment or computer setups automatically.

Highest-Cost Appliances by Category

Electric water heaters and HVAC systems typically represent 40–50% of a home electricity bill. Electric dryers run 5,000 watts — a single load costs $0.40–$0.80 depending on your rate. Refrigerators run continuously at 100–400 watts; older models (pre-2000) can cost 2–3× more to run than modern Energy Star units. Dishwashers use most of their energy heating water for the heated drying cycle — turning off heated dry saves 25–30% of dishwasher electricity. Running large appliances during off-peak hours (typically nights and weekends) can reduce costs if your utility offers time-of-use pricing.

Reducing Your Bill Without Sacrifice

The highest-ROI electricity reductions come from behavioral changes that require no upfront cost: setting your thermostat 7–10°F lower while sleeping or away reduces HVAC costs by 10%; washing clothes in cold water saves the energy that would heat it (80–90% of a wash cycle's energy is water heating); air-drying dishes instead of using heated dry costs nothing. LED bulbs use 75% less energy than incandescent with the same light output and last 15–25× longer. A programmable or smart thermostat typically pays for itself in 6–12 months in most climates.