Utilz
Electricity Cost Calculator
Estimate energy costs for any appliance
Why Use This Tool?
- Identify which appliances cost the most to run and reduce your electricity bill.
- Estimate energy costs before purchasing a new appliance.
- Plan your monthly budget by understanding your electricity consumption.
Formula
Cost = (Watts x Hours x Days) / 1000 x Rate per kWh. Dividing by 1000 converts Wh to kWh. For example, a 1000W heater used 8 hours/day for 30 days at $0.12/kWh: Cost = (1000 x 8 x 30) / 1000 x 0.12 = $28.80.
How to Use
- Enter the appliance wattage in watts
- Enter daily usage hours
- Enter the number of days
- Enter your electricity rate ($/kWh)
- View daily, monthly, and yearly cost estimates
FAQ
How is electricity cost calculated?
Electricity cost = (Watts × Hours per Day × Days) / 1000 × Rate per kWh. Dividing by 1000 converts watt-hours to kilowatt-hours (kWh), the standard billing unit.
What is the average electricity rate?
The average electricity rate in the US is around $0.12-0.16 per kWh. Rates vary significantly by region, time of use, and provider. Check your electricity bill for your exact rate.
How do I find the wattage of my appliance?
Check the label on the appliance, its manual, or the manufacturer website. Common examples: LED bulb 10W, refrigerator 150W, microwave 1000W, air conditioner 1500W.
What is a kilowatt-hour (kWh)?
A kilowatt-hour is the amount of energy used by a 1,000-watt appliance running for one hour. It is the standard unit used on electricity bills.
Which appliances use the most electricity?
Central air conditioning (3,000-5,000W), electric water heater (4,000-5,500W), clothes dryer (2,000-5,000W), and electric oven (2,000-5,000W) are typically the biggest electricity consumers in a home.