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Kilowatt hour conversion calculator

As electricity measurement unit, the Kilowatt hour is used by the electricity providers to measure the electricity used by the households and generate the electricity bills.

If you are interested to know how to reduce the electricity usage and the electricity bill, you need to learn what a Kilowatt hour is.

What is a Kilowatt hour

A Kilowatt hour (kWh) it is a unit used to measure power.

A Watt (W) it is the amount of energy that our household appliances and devices need to function, the rate at which they consume energy.

One Kilowatt it is the equivalent to 1000 watts.

1kW = 1000 W

And one Kilowatt hour it is the amount of energy that a 1000 watts household appliance or device would use to run continuously for one hour.

1 kWh = 1 kW x 1 hour

The following video explains what a Kilowatt hour is and how it is related to other power measurement units and our household appliances and devices. Do not forget to enable the video captions, as the video caption contains the concepts explanations.

What is a Kilowatt hour (kWh)

Conversion calculator to convert Kilowatt hours to other units

Watt (W) to Kilowatt hour (kWh) conversion calculator

To convert Watts (W) to Kilowatt hours (kWh) you need to divide the number of Watts by 1000 and afterwards multiply the result by the number of hours.

kWh = (W/1000) x Hours

kWh is the measurement unit used by the electricity suppliers to calculate our electricity bills. 

Also, most of the big appliances, like the dishwashers or washing machines, rate their consumption in kWh.

 

For example, if a device uses 300 Watts and has been in use for 5 hours:

(300/1000) = 0.3 kW

0.3 kW x 5 hours = 1.5 kWh 

Kilowatt (kW) to Kilowatt hour (kWh) conversion calculator

To convert Kilowatts (kW) to Kilowatt hours (kWh) you need to multiply the number of Kilowatts by the number of hours.

kWh = kW x Hours

kWh is the measurement unit used by the electricity suppliers to calculate our electricity bills. 

Also, most of the big appliances, like the dishwashers or washing machines, rate their consumption in kWh.

 

For example, to convert 25 Kilowatts to Megawatts:

25 kW / 1000 = 0.025 MW

A few other examples from our ‘Electricity usage and electricity cost calculators‘ page that may be of your interest:

Kilowatt hour electricity usage monitor

If you want to know the exact electricity usage of an appliance or device, your best option is to use a plug in power meter to measure the electricity consumption. 

Clicking on the image below it will redirect you to the Amazon page where you can have a look to the specifications of the power meter we use for our measurements.

plug in power meter

All of our house appliances and devices like the washing machine, the dishwasher, the TV or the printer are plugged to a wall socket. 

So, with a power consumption meter we can determine how much electricity our appliances or devices are using and, more importantly, we can measure the electricity usage over a period of time.

If you want to find out how you can use a plug in power meter to measure your electricity usage and electricity cost, have a look to this YouTube video.

Plug in power meter

Kilowatt hour FAQ

How to calculate the cost of a kWh

You don’t need to calculate the cost of a kWh.

When you signed a contract with your electricity provider, the cost per kWh was agreed.

For example, the user from the picture below agreed to pay 31,90 cents per kWh and the electricity company agreed to maintain that tariff, the cost per kWh, for 2 years.

electricity cost

How to calculate kWh usage per month

Nowadays, most of the electricity companies have a website where the users can log in and have access to the electricity usage data.

As an example, the user from the picture below used 2456 kWh in a year which is 81.86 kWh per month.

electricity usage per year

How to calculate kWh per day

The simplest way to calculate the electricity usage in kWh per day, it is to have a look to the electricity meter, record the value, and the next day record it again.

Kilowatt hour and energy conservation

Energy conservation can be defined as the decision and the act of using less energy

Energy conservation both benefit you and the environment 

The act of saving and conserving electricity does benefit you because you will be paying less on your energy bills. 

And it also does benefit the environment because conserving electricity prevents any unnecessary waste of natural resources.

Now, at individual level it may not look worth to try to save a few watts here or there. 

Still, every little counts and if hundreds or thousands of us do save a little every time, it will make an important contribution towards conserving our natural resources.

 

For example, if 9000 households would manage to save as little as 10 Watts per day (0,01 kWh) that would add to 32850 Kilowatt hour (kWh) saved per year. 

9000 households x 0,01 kWh per day x 365 days per year 

32,850 kWh saved per year

That is a considerable amount of electricity, but let’s add additional perspectives for clarity:

> Assuming an average cost of 0,18 euro (or dollars, or pounds, or any other currency) per kWh, we would collectively be saving nearly 6000 euro per year.

> To produce 32,850 kWh of electricity it is necessary to use around 17 metric tons of coal or 56 barrels of residual fuel oil.

Have a look to this page for more information about the amount of resources needed to produce electricity.
 

In any case it is clear that small energy savings do really count when looking into the bigger picture.

Proven ways to save electricity at home

If you are looking for ideas to save electricity at home, have a look to this YouTube video were we show some useful tips to reduce the electricity usage at home and decrease the electricity bill. 

How to save electricity at home
How to save
How to save
How to earn
How to earn

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