How do I calculate my electricity bill from appliance usage?

Energy (kWh) = Watts × Hours used per day / 1000. Daily cost = kWh × rate. Monthly cost = daily cost × 30.44. This calculator sums all your appliances to give a complete bill estimate.

How much CO2 does my electricity usage produce?

On average, each kWh of grid electricity produces about 0.386 kg of CO₂. Our calculator multiplies your total kWh usage by this factor to estimate your carbon footprint from electricity.

What is the average electricity rate in the United States?

The average US residential electricity rate is approximately $0.14 per kWh as of 2025, but rates vary by state from $0.10 to over $0.30 per kWh. Our calculator includes preset rates for the US, UK, EU, and other regions.

Electricity Cost Calculator

Estimate your monthly and annual electricity bills by appliance. Add devices, set wattage and usage hours, and see a complete cost breakdown.

Electricity Rate ($/kWh)

Appliances

Appliance	Watts	Hrs/Day	Qty	kWh/Day	Cost/Day	Cost/Month	Cost/Year

How to Estimate Your Electricity Bill

Track your energy usage and save money in three simple steps.

Set Your Rate

Enter your local electricity rate in $/kWh or select from preset rates for US, UK, EU, Canada, or Australia.

Add Appliances

Choose from 20+ common appliances with default wattages, or add custom devices. Set hours per day and quantity for each.

View & Save

See a table of costs per day/month/year per appliance, total bill estimate, and CO &sub2; impact. The bar chart highlights your top energy users.

Frequently Asked Questions

Common questions about electricity cost calculations.

Energy (kWh) = Watts × Hours ÷ 1000. Daily cost = kWh × rate. Monthly cost = daily cost × 30.44. Sum all appliances for your estimated total bill.

Each kWh of grid electricity produces approximately 0.386 kg of CO &sub2; on average. Our calculator multiplies your total kWh by this factor to estimate your carbon footprint from electricity consumption.

The average US residential electricity rate is about $0.14/kWh as of 2025, ranging from $0.10/kWh in states like Louisiana to over $0.30/kWh in Hawaii and California. Use our preset rates for quick estimates.