Enter your device's Power (kW) and how long it runs (Time) to calculate its Energy Consumption in kWh, plus estimated Daily and Monthly Costs at the default rate of $0.15/kWh.
Energy Consumption
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Daily Cost (@ $0.15/kWh)
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Monthly Cost (@ $0.15/kWh)
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kW (kilowatt) is a unit of power that measures how much energy is being used at any given moment. kWh (kilowatt-hour) is a unit of energy that measures the total amount of power consumed over time. Think of kW as the speed of energy usage and kWh as the distance traveled.
To calculate kWh from kW, multiply the power in kilowatts by the time in hours: Energy (kWh) = Power (kW) × Time (hours). For example, a 2 kW device running for 5 hours consumes 10 kWh of energy.
The standard kWh formula requires time in hours. If you have time in minutes, first convert to hours by dividing by 60. For example, 30 minutes = 0.5 hours. Then use the formula: kWh = kW × hours.
To convert watts to kilowatts, divide the wattage by 1,000. For example, 1,500 watts = 1.5 kilowatts. This is because 1 kilowatt equals 1,000 watts.
Electricity companies charge customers based on kWh consumption because it represents the total energy used. Your monthly bill shows how many kWh you consumed, multiplied by the rate per kWh to calculate your electricity cost.
Common appliances: LED bulb (0.01 kW), microwave (1-1.5 kW), refrigerator (0.1-0.8 kW), air conditioner (1-5 kW), electric heater (1-3 kW), washing machine (0.5-2 kW), and electric oven (2-5 kW).
Reduce kWh by using energy-efficient appliances, turning off devices when not in use, using LED lighting, properly insulating your home, and running high-power appliances during off-peak hours when rates may be lower.