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Energy Cost Calculator

Add the required inputs to this online energy cost calculator and this hand tool will calculate the cost in seconds.

Typical appliance:

Power consumption:

watts (W) ▾

Energy cost per day:

h/day

1 kilowatt-hour (kWh) cost:

$/cent ▾

Related

Quickly estimate the electricity cost of running any appliance using our easy energy cost calculator.

Energy Consumption Calculation Formula:

E(kWh/day) = P(W) × t(h/day) / 1000 (W/kW)

Energy Cost Formula:

Cost ($/day) = E(kWh/day) × Cost (cents/kWh) / 100 (cents/$)

With a power cost calculator, you can calculate electricity expenses in seconds just by entering a few details about the appliance.

How to Calculate Energy Cost?

To manually calculate energy cost, follow these steps:

Find out the electricity rate per kWh from your utility bill
Check the power rating of the appliance (in watts)
Use the formulas above to calculate energy consumption and multiply by the electricity rate

Example:

Let's determine the weekly energy cost for a home appliance, such as a washing machine. Assume:

Appliance: Washing Machine
Power Consumption: 500 W
Daily Usage: 1.5 hours
Number of Days Used per Week: 5 days
Electricity Cost: $0.15 per kWh

Solution:

Step 1: Daily energy consumption:

Daily Energy = Power × Usage Time
500 W × 1.5 hr = 750 Wh = 0.75 kWh

Step 2: Weekly energy consumption:

Weekly Energy = Daily Energy × Number of Days
0.75 kWh × 5 days = 3.75 kWh

Step 3: Weekly energy cost:

Cost = Weekly Energy × Rate per kWh
Cost = 3.75 kWh × $0.15 = $0.5625 ≈ $0.56

Using this method, running a 500 W washing machine for 1.5 hours per day, 5 days a week, costs about $0.56 weekly. Alternatively, the energy calculator can do this instantly.

How Our Energy Cost Calculator Works

Our calculator quickly estimates the electricity cost of any device based on your usage. Here's what you need to enter:

Required Inputs:

Appliance: Choose the appliance you want to analyze
Power Rating: Enter wattage or kilowatts
Hours Used Daily: Specify the daily usage
Electricity Rate: Input cost per kWh in your area

Output:

Daily Energy Cost: Cost of running the appliance per day
Weekly Energy Cost: Cost over a week
Monthly/Annual Cost: Estimates for longer durations

This tool is ideal for homeowners, offices, and commercial spaces who want to track energy usage and reduce costs effectively.

Power Consumption of Common Appliances

Here is an updated table with new appliance examples and their estimated power consumption:

Appliances	Estimated Wattage (W)
Home appliances:
Electric Fireplace	800-1500
Ceiling Fan	30-75
LED TV (40-55 inch)	60-150
Vacuum Cleaner	500-1200
Portable Heater	1000-2000
Kitchen appliances:
Blender	300-700
Slow Cooker	200-300
Espresso Machine	800-1500
Induction Cooktop	1200-1800
Food Processor	400-1000
Office & Other Appliances:
Desktop Computer	150-300
Laptop	30-100
Printer	50-200
Router/Modem	5-20
Electric Scooter Charger	150-400

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