What is the average price of electricity in the United States?

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Electricity Cost Calculator

Estimate power consumption in kilowatt-hours (kWh) and calculate monthly and annual electric utility costs for any home appliance.

Appliance Electricity Usage & Cost Calculator

Estimate running costs and electrical utility bills for home appliances, AC units, heaters, and electronics.

Appliance Power Rating

Watts

Check manufacturer label, UL nameplate, or yellow EnergyGuide tag.

Common Household Appliances

Hours Active / Day

hrs

Average daily active runtime.

Billing Period

days

Typical billing cycle: 30 days.

Utility Rate ($ / kWh)

/kWh

Check your electricity bill for total generation + transmission rate.

Reference Benchmarks (U.S. EIA 2024 Annual Averages)EIA Table 2.10 →

Source: U.S. Energy Information Administration (EIA) Electric Power Annual, Table 2.10 (Residential Sector, 2024 annual averages: U.S. Total: 16.48¢/kWh; WA: 11.90¢/kWh; TX: 14.94¢/kWh; CA: 31.97¢/kWh; HI: 42.86¢/kWh). EIA benchmark rates reflect statewide annual statistical averages, not individual household utility tariffs. Your actual power bill includes local rate schedules, fixed monthly meter fees, seasonal tiers, and taxes. The rate input above is fully editable.

Estimated Cost (30 Days)

$44.55

Total energy: 270.0 kWh consumed (9.00 kWh/day)

Hourly Running Cost$0.248/hr1.50 kW active power

Daily Cost$1.49/day6 hours daily

30-Day Monthly Estimate$44.55270 kWh/month

Annual Cost (365 Days)$542.03/yr3285 kWh/year

Calculation Steps

1.Convert Watts to kW: 1500 W ÷ 1000 = 1.500 kW (1.500 kWh per hour of operation)
2.Hourly running cost: 1.500 kW × $0.165/kWh = $0.248/hr
3.Daily consumption: 1.500 kW × 6 hrs/day = 9.000 kWh/day ($1.49/day)
4.Total electricity consumption over 30 days: 9.000 kWh × 30 days = 270.00 kWh
5.Estimated cost for 30 days: 270.00 kWh × $0.165/kWh = $44.55
6.Standard 30-day billing cycle projection: $44.55 | 365-day annual projection: $542.03

Duty Cycle & Appliance Consumption Notes

Thermostat Duty Cycles: Refrigerators, space heaters, and air conditioners do not draw peak wattage continuously. A 1500W space heater cycling 50% of the time averages 750W over an hour.
Standby / Vampire Draw: Modern TVs, game consoles, and chargers draw 1W to 15W in standby mode 24 hours a day, adding roughly $15 to $30 annually per device.
EIA Rate Variance: Electricity rates vary by more than 300% across the United States, from approximately 11¢/kWh in states with abundant hydropower (Washington, Idaho) to over 35¢/kWh in California, Connecticut, and Hawaii.

Mathematical Formula & Calculation Method

Daily kWh = (Watts × Hours / Day) / 1000 | Cost = kWh × Rate per kWh

Formula Components:

Hourly Energy Draw (kW) = Appliance Watts ÷ 1,000
Hourly Running Cost = Hourly kW × Utility Rate per kWh
Daily Energy (kWh) = Hourly kW × Daily Active Hours
Daily Electricity Cost = Daily kWh × Utility Price per kWh
Total Period Cost = Daily Cost × Number of Days (e.g. 30 for monthly billing cycle)
Annual Cost = Daily Cost × 365 days

How It Works

Enter the appliance wattage rating from its UL nameplate or yellow EnergyGuide label.

Specify the average active runtime hours per day.

Select an illustrative benchmark rate from U.S. EIA 2024 annual survey data ($0.165/kWh US residential annual average, Table 2.10) or enter your actual utility rate from your electric bill.

Set billing duration (default: 30 days) to calculate hourly, daily, monthly, and annual operational costs.

Practical Calculation Examples

1,500W Space Heater Running 6 Hours/Day for 30 Days ($0.165/kWh EIA 2024 Benchmark)

Using an electric space heater during a cold winter month.

Step 1:Hourly draw: 1,500 W ÷ 1,000 = 1.5 kW ($0.2475 per hour).

Step 2:Daily kWh: 1.5 kW × 6 hrs = 9.0 kWh/day ($1.485/day).

Step 3:30-day bill: 9.0 kWh/day × 30 days = 270 kWh × $0.165 = $44.55.

Outcome: Running the space heater costs $44.55 per month ($0.25/hr, 270 kWh total).

400W Gaming Computer Running 4 Hours/Day for a Full Year ($0.165/kWh)

Estimating the annual power expense of a high-performance desktop workstation.

Step 1:Daily kWh: (400 × 4) ÷ 1,000 = 1.6 kWh/day.

Step 2:Annual kWh: 1.6 × 365 = 584 kWh/year.

Step 3:Annual cost: 584 × $0.165 = $96.36/year ($8.03/month).

Outcome: Gaming PC costs $96.36 per year to operate ($0.066/hr).

Important Assumptions & Estimator Guidance

Default utility rate calibrated to U.S. Energy Information Administration (EIA) Electric Power Annual Table 2.10 residential benchmark ($0.165/kWh [16.48¢], 2024 annual average). The rate is fully editable.
Appliance is assumed to consume full rated wattage while actively running.
Thermostatically cycled devices (refrigerators, AC compressors, space heaters) cycle on and off, averaging lower net draw than peak rating.
Utility rate is assumed flat; time-of-use (TOU) on-peak vs off-peak tiering is not simulated.
Standby / phantom power is not included; modern electronics typically draw 1W to 15W continuously when turned "off".

Common Pitfalls & Mistakes to Avoid

Confusing Watts with Kilowatt-Hours (kWh)

Watts measure instantaneous power draw, whereas kilowatt-hours measure total energy consumed over time.

Correction: Divide watt-hours by 1,000 to convert to billable kWh.

In-Depth Companion Guide

How to Calculate Electricity Cost for an Appliance

Calculate appliance energy usage and running costs: convert watts to kilowatt-hours (kWh), factor electricity utility rates, and compare monthly expenses.

Read Companion Guide

Frequently Asked Questions

According to the U.S. EIA Electric Power Annual (Table 2.10, 2024 annual data), the U.S. residential average was 16.48¢ per kWh (~$0.165/kWh), ranging from 11.90¢/kWh in lower-cost states like Washington to 31.97¢/kWh in California and 42.86¢/kWh in Hawaii.

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