How much carbon dioxide does your website produce?

Estimate emissions

By using this carbon calculator, you agree to the information that you submit being stored and published in our public database.

Do websites really contribute to climate change?


The internet consumes a lot of electricity. 416.2TWh per year to be precise. To give you some perspective, that’s more than the entire United Kingdom.

From data centres to transmision networks to the devices that we hold in our hands, it is all consuming electricity, and in turn producing carbon emissions.

6.8grams CO2

That’s the average amount of carbon dioxide emitted every time a web page is loaded. You read that right, every time!

Click, 6.8 grams, click, 6.8 grams, click….aaarrghh!

In total, the internet produces 2% of global carbon emissions, roughly the same as that bad boy of climate change, the aviation industry.

The world’s lowest carbon websites as tested by our website carbon calculator tool

RankWebsite URLCO2/page view*

Based on homepage testing. Full site testing may reveal different overall performance.

The website carbon calculator has been created by Wholegrain Digital to help fight climate change, because as Peter Drucker says:

“you can’t manage what you can’t measure”