Electricity Cost Calculator

Calculate exact electricity operating costs for household appliances, electronics, heaters, and AC units. View hourly, daily, monthly, and yearly power consumption.

Appliance & Utility Settings

Live Calculation
How many hours this appliance operates daily
hrs/day
National average is ~$0.165 / kWh
$/kWh
Quick State Average Rates:
Monthly Operating Cost
$43.80/ month (273.8 kWh)
$1.44 / day

Daily Power

9 kWh / day

Hourly Rate

24¢ / hour

Annual Energy

3,285 kWh/yr

CO2 Emissions

2,792 lbs/yr

Operating Expense Timeline (Electric Space Heater)

1-Month Cost$43.80
1-Year Cost$525.60
5-Year Total$2,628.00

Energy Saving Recommendation

High-wattage heating elements (like 1,500W space heaters) are purely resistive. Upgrading to a modern inverter-driven mini-split heat pump delivers 3× more heat per kWh, reducing operating cost by up to 66%.

How to Calculate Appliance Electricity Consumption and Cost

Every electrical appliance has a wattage power rating located on its UL label or user manual. To calculate operating cost, convert power draw to kilowatt-hours (kWh), which is the billing unit used by electric utility companies.

1. Kilowatt-Hours (kWh) Consumption Formula
Daily Energy (kWh)=
Power (Watts) × Usage Hours per Day1,000 (Watts per kW)
2. Electricity Operating Cost Equation
Daily Cost ($)=Daily kWh × Utility Electricity Rate ($/kWh);Monthly Cost=Daily Cost × 30.4 days
Step-by-Step Calculation Breakdown
Step 1: Calculate Daily Kilowatt-Hours (1,500W Space Heater @ 6 Hours/Day)
Daily Watt-Hours = 1,500 Watts × 6 Hours = 9,000 Watt-hours
Daily kWh = 9,000 ÷ 1,000 = 9.00 kWh / day
Step 2: Calculate Daily & Monthly Operating Cost (@ $0.16 / kWh)
Daily Cost = 9.00 kWh × $0.16/kWh = $1.44 per day
Monthly Cost = $1.44 × 30.4 days = $43.78 per month
Step 3: Calculate Annual Operating Expenditure & Carbon Footprint
Yearly Cost=9.00 kWh × 365 × $0.16=$525.60 / year (3,285 kWh / 2,792 lbs CO2)

Common Household Appliances Power & Operating Cost Benchmark

ApplianceAvg WattageDaily UsageMonthly Cost (@ $0.16/kWh)
Central AC (3 Ton 16 SEER)3,500 W8 hrs/day$136.20 / mo
Electric Water Heater (50 Gal)4,500 W3 hrs/day$65.70 / mo
Electric Space Heater1,500 W6 hrs/day$43.80 / mo
Clothes Dryer3,000 W1 hr/day$14.60 / mo
Refrigerator / Freezer (Energy Star)150 W24 hrs/day$17.50 / mo
55" 4K Smart TV110 W5 hrs/day$2.68 / mo

Frequently Asked Questions

How do I calculate the electricity cost of an appliance?
Multiply the appliance wattage by daily hours of use, divide by 1,000 to convert to kilowatt-hours (kWh), and multiply by your utility's electricity rate ($/kWh). For example, a 1,500-watt space heater used 6 hours per day consumes (1,500 × 6) ÷ 1,000 = 9.0 kWh daily. At $0.16/kWh, that costs $1.44 per day, or $43.20 per month.
What are the most power-hungry appliances in a home?
Central air conditioning and electric heat pumps consume 40%–50% of total household electricity. Other major energy users include electric water heaters (~14%), electric clothes dryers (~6%), refrigerators (~5%), and EV home chargers. Space heaters and pool pumps are also significant power consumers.
What is the average electricity rate in the US in 2026?
As of 2026, the national average residential electricity rate is approximately $0.165 per kWh. Rates vary dramatically by state: Louisiana and Washington average $0.11–$0.12/kWh, Texas averages $0.14/kWh, while California ($0.32/kWh), Hawaii ($0.42/kWh), and New England ($0.26–$0.30/kWh) have much higher rates.
How much does phantom (standby) power cost per year?
Standby power consumed by idle electronics (TVs, game consoles, cable boxes, chargers, microwave clocks) accounts for 5%–10% of typical residential electricity bills, costing the average household $100 to $220 annually. Using smart surge protectors automatically eliminates phantom power draw.
How much money does switching to LED bulbs save?
Replacing five 60-watt incandescent bulbs (300W total) with five 9-watt LED bulbs (45W total) running 5 hours per day saves approximately 465 kWh annually. At $0.16/kWh, this saves ~$75 per year in electricity while lasting 15–20 times longer.

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