High School Physics + more

# Calculating Electrical Energy consumption & kWh

Last updated on May 12th, 2023 at 11:12 am

Some electric utility providers measure energy in units of kWh. This is a non-SI unit, but it makes sense for energy delivery.

If power is energy/time, then energy is power × time.

So, Electric Energy consumption = Electric power x Time

So kW⋅h is a valid measure of energy. Here, electric power is measured in kW (kilo Watt), and time duration is measured in hours. Hence, the energy unit used to measure or calculate Electrical Energy consumption is kiloWatt-Hour or kWh.

Know more about kWh – commercial unit to measure electric energy consumption.

Sample Calculation of electrical energy consumption in kWh

If you run your 100 W light bulb for 20 h, you’ll use 100 W × 20 h = 2000 W⋅h = 2 kW⋅h of energy.

If you run a 1.5 kW electric gadget for 4 hours, then electrical energy consumption is calculated in the following way: Electric Energy consumption = Electric power x Time = 1.5 kW x 4 hrs = 6 kWh.

kWh FAQs

• 1 kWh is equal to 36 x 105 Joules
• 1 kWh is equal to how many joules: 36 x 105 Joules.
• kWh is the unit of Energy
• kWh full form: KiloWattHour
• kWh to MWh: 1 kWh = 0.001 MWh
• kWh formula: E = P t where E is in kWh, P is in kiloWatt, and t is in hours.
• kWh to joules: 1 kWh is equal to 36 x 105 Joules

kWh – commercial unit to measure electric energy consumption. – You may Read this post.