Electricity Cost Calculator
Calculate how much it costs to run any electrical appliance based on wattage, usage, and electricity rate.
Power consumption of the appliance in watts
How many hours per day the appliance runs
Your electricity rate per kilowatt-hour
Duration to calculate total consumption for
How to Use the Electricity Cost Calculator
1. Enter the wattage of the appliance. You can usually find this on the appliance label or in its specifications.
2. Enter the hours you use the appliance per day.
3. Enter your electricity rate in dollars per kWh. Check your electricity bill or provider's website for this rate.
4. Set the number of days for the calculation period (default is 30).
5. Click Calculate to see the daily, weekly, monthly, and yearly costs along with total kWh consumed.
Frequently Asked Questions
How is electricity cost calculated?
The formula is: Cost = (Wattage x Hours per Day / 1000) x Rate per kWh. First, convert watts to kilowatts by dividing by 1000, then multiply by hours of use and the rate per kWh.
What is the average electricity rate?
Electricity rates vary significantly by region. In the United States, the average residential rate is approximately $0.12-$0.16 per kWh. Check your electricity bill for your specific rate.
Where can I find the wattage of my appliance?
Check the label or sticker on the appliance itself, the user manual, or the manufacturer's website. Common examples: LED bulb (10W), laptop (50-100W), refrigerator (100-400W), air conditioner (1000-3500W).
What is a kWh?
A kilowatt-hour (kWh) is a unit of energy. It represents the amount of energy consumed by a 1,000-watt appliance running for 1 hour. Your electricity bill charges you based on the number of kWh you consume.