2022 Electricity Cost Calculator

Estimate the cost of electricity and energy usage in kWh by entering its power consumption and time the appliance or device is on. Learn about the power consumption of common appliances.

The average price of electricity is 12 cents per kWh

Electricity Cost Estimate:

Current Cost per Month


Total kWh per Month

14.40 kWh
Learn how we calculated this below

On this page:

How to Estimate Electricity Cost and Energy Usage

Homes these days are equipped with many appliances, and we use dozens, if not hundreds, of other devices making it difficult to predict energy usage.

The easiest way to estimate energy consumption in kilowatt-hours and how much each appliance and device costs on your electric bill is to use the calculator above.

Continue reading to learn some easy formulas to calculate this yourself.

Electrical power lines in the sunset

How to Calculate Your Electric Bill

To calculate how much an appliance contributes to your electric bill, first calculate the energy used in kilowatt-hours (kWh), then calculate the total kWh cost for the appliance.

Step One: Calculate the Energy Used in Kilowatt-Hours

The first step to estimating energy usage and costs is to calculate the kilowatt-hours (kWh) of energy used. Kilowatt-hours are a measurement of the power in kilowatts consumed in one hour.

To calculate kWh, start by finding the power consumption of the appliance in watts. This could be marked on the device, in the owner’s manual, or in the technical specifications.

Next, multiply the power in watts by the hours used per day, then divide by 1,000 to get the kilowatt-hours used.

The kilowatt-hour usage formula is:

kWh = P(W) × T(h/day) ÷ 1,000(W)

You can easily do this using a watts to kWh calculator.

Step Two: Calculate the Electricity Cost

To find the price for the kWh used, multiplying by the cost per kWh charged by the electric company by the kilowatt-hours measurement found above.

Electricity costs vary, but the national average electricity cost is $.12 per kilowatt-hour. This cost is shown on the monthly electric bill from the power company.

The electricity price formula is:

Price = Electricity(kWh) × Cost(price/kWh)

For example, find the electricity cost per month to charge an electric vehicle for 4 hours per day using a 9,600 watt charger.

Find the kilowatt-hours:

kWh = P(W) × T(h/day) ÷ 1,000(W)
kWh = 9,600 W × 4 hrs ÷ 1,000
kWh = 38.4 kWh

Calculate the cost:

Price = Electricity(kWh) × Cost(cost/kWh)
Price = 38.4 kWh × $.12
Price = $4.61 per day

Monthly Price = $4.61 per day × 30
Monthly Price = $138.30

It would cost $138.30 per month to charge an electric vehicle for 4 hours per day using a 9,600 watt charger.

It’s also possible to use this formula to find out how much a light bulb or light fixture costs per month. Use our lighting cost estimator to find out how much lamps and light bulbs cost to keep on for the month and to find out how much money can be saved by upgrading to LED light bulbs.

Power Consumption of Common Appliances

Power consumption of common household electrical devices and appliances
Appliance / Device Power Consumed
electric vehicle charger 7,200W – 12,000W
air conditioner 2,000W – 4,000W
baseboard heater 1,500W
portable heater 1,500W
garage heater 5,000W
refrigerator 150W – 350W
deep freezer 100W – 350W
oven 2,000W
stove 1,000W
dishwasher 1,200W – 1,500W
clothes washer 500W
clothes dryer 4,000W
desktop computer 200W
laptop computer 50W
LED TV 20W – 60W
LCD TV 90W – 250W
plasma TV 260W – 340W
LED light bulb 7W – 10W
fluorescent light bulb 16W – 20W
60W incandescent light bulb 60W
ceiling fan 25W – 75W
table fan 10W – 25W

Our voltage drop calculator can calculate a drop in voltage, minimum wire size, and maximum wire length for your electrical project.