Add all your home appliances to calculate total electricity usage and cost. See which devices consume the most energy with daily, monthly, and yearly breakdowns.
Understanding where your electricity goes is the first step to reducing your energy bill. Most people are surprised to learn that HVAC (heating and cooling) accounts for 40–50% of their total electricity consumption, followed by water heating at 15–20%. This calculator lets you add every device in your home and see exactly which ones are costing you the most — and where the biggest savings opportunities lie.
| Category | % of Total | Avg Monthly Cost | Top Saving Tip |
|---|---|---|---|
| HVAC (Heat/Cool) | 40–50% | $80–$120 | Thermostat ±2°F saves 6% |
| Water Heating | 15–20% | $30–$50 | Lower to 120°F saves 10% |
| Laundry | 8–10% | $15–$25 | Cold wash, line dry |
| Refrigeration | 5–8% | $10–$18 | Clean coils, keep full |
| Lighting | 8–10% | $10–$20 | Switch all to LED |
| Electronics | 5–8% | $8–$15 | Smart power strips |
| Cooking | 3–5% | $5–$10 | Use microwave more |
Devices that appear "off" but remain plugged in still draw power — this is called phantom load or vampire power. Common culprits include TVs (5W standby), game consoles (10–15W), cable boxes (15–25W), laptop chargers (5W), and smart speakers (3–5W each). Combined, phantom loads can account for 5–10% of your electricity bill — $100–$200 per year. The fix is simple: use smart power strips that cut power completely when devices are off.
Energy consumption varies dramatically by season. Summer AC use can double or triple your electricity bill in hot climates. Winter heating (if electric) has a similar effect in cold regions. The key is to compare your bills month-to-month and year-to-year to understand your baseline and identify unusual spikes. Most utilities offer online portals with historical usage data and comparisons to similar homes in your area.