Appliance Power Consumption & Electricity Cost
Calculate daily, monthly, and annual electricity costs for household appliances based on wattage, usage hours, and local utility $/kWh rates.
Calculated Results
Frequently Asked Questions
What is the formula to calculate electricity cost from watts?
1. Calculate daily kilowatt-hours: kWh = (Watts × Daily Hours) / 1,000. 2. Calculate daily cost: Daily Cost = kWh × Electricity Rate ($/kWh). 3. Monthly Cost = Daily Cost × 30.4 days.
What is the average electricity cost per kilowatt-hour (kWh) in the US?
As of 2026, the US national average residential electricity rate is approximately $0.165 per kWh. Rates vary widely by state: from $0.11/kWh in Washington and Idaho to $0.28/kWh in California and $0.42/kWh in Hawaii.
Which household appliances consume the most electricity?
Central air conditioning and space heating consume over 40% of home electricity, followed by electric water heaters (18%), clothes dryers (5%), refrigerators (4%), and electric cooking ranges (3%).
What is phantom load or vampire power?
Vampire power is the standby electricity consumed by electronics when turned off or in sleep mode (TVs, cable boxes, game consoles, phone chargers). In an average home, vampire draw accounts for 5% to 10% of total residential electric bills.