How much does a kWh cost?

kWh stands for kilowatt hours. It is the unit of measurement used to calculate a household’s electricity consumption. One kWh corresponds to the amount of electricity a 1,000 watt electrical appliance uses in 1 hour.

What does 1 kWh cost?

It is perhaps one of the phenomena in your everyday life that you think about the least but consume up to several hours daily. Kilowatt hours or kWh. When clothes need to be washed, when your mobile phone or electric car needs to be charged, or when you’re streaming the latest TV series, then kilowatt hours (kWh) are counted by your electricity meter.

But what is a kWh really, what does 1 kWh cost, how much CO2 does a kWh emit, and how can you get an insight into and understanding of your kWh consumption?

What is kWh?

kWh stands for kilowatt hours. This is the unit of measurement used to calculate a household's electricity consumption.

One kWh corresponds to the amount of electricity a 1,000 watt electrical appliance uses in 1 hour. The power or effect of electricity is measured in watts, but the actual amount of electricity used is calculated in kilowatt hours. As with weight indications that can vary in grams, kilograms, and tons, electricity’s output can also vary in size.

In addition to kW, there are therefore also MW (megawatt, which corresponds to 1,000 kW), GW (gigawatt, which corresponds to 1 million kW), and TW (terawatt, which corresponds to 1 million MW).

How far does a kWh go?

A kWh is equivalent to 3.6 megajoules and is pretty much the amount of energy a washing machine with energy brand A+++ uses on a regular laundry.

For the same kWh, you can make 5 pots of coffee with a traditional coffee machine.

How much does a kWh cost?

At Watts, the average price of 1 kWh is usually around DKK 2.35. However, at times there can be extraordinary circumstances that send the price of a kWh up or cause it to fall.

This can be during periods of unfavourable weather conditions, such as in the summer of 2021, when Danish electricity prices were negatively affected by the lack of wind and rain here in Denmark and in the rest of Europe. When this happens, it affects all electricity providers in the Danish market.

How much electricity do I use per year?

The consumption of kWh per household of course varies according to how many electronic devices are used daily and for how long. However, it is estimated that a single person uses an average of 1,600 kWh per year, while an ordinary Danish family with two adults and two children uses approximately 4,400 kWh per year.

You can optionally use Watts’ energy assistant to compare yourself with other Watts users who have the same housing and family conditions as yourself.

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Can I check the kWh consumption at home myself?

Yes, it’s possible to get a specific insight into the kWh consumption in your household. Watts’ energy assistant talks to your electricity meter and thus gives you a unique opportunity to be able to read the kWh consumption on a daily basis.

Watts also gives you a direct say in your electricity bill, since you get an insight into the day’s power zones, where you can see when the power is cheapest. Since Watts charges for electricity consumption by the individual hour, you can actively choose cheaper power zones. Potentially, by setting the washing machine to start at exactly the time of day when the power is cheapest.

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How much CO2 does 1 kWh emit?

It varies depending on the energy source at that time. At times, the electricity in Denmark is created by 100% renewable energy. In windless or dry periods when it’s not possible to generate electricity using wind turbines and hydropower, a kWh emits its highest CO2 level.

In 2020, one kWh emitted an average of 117 grams of CO2. This is the lowest CO2 emission per kWh ever measured in Denmark (source:

Can you choose kilowatt hours with a low CO2 footprint?

Watts’ energy assistant not only makes sure that your electricity consumption is transparent, you also get an ongoing overview of the times of the day when electricity in Denmark is produced most by wind turbine energy and other renewable energy sources.

Thus, you have a tool at hand where you can actively choose a greener path for you and your everyday life.


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