Calculate the carbon footprint of your website

Enter your homepage url here and we'll do the rest.

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Assessing your website...

Please allow up to 30 seconds for results.

Your website acheived a rating of {{ data.rating.toUpperCase() }}

What does this rating mean?

  • 🫤

    {{ data.emissions }}g of CO2e is emitted each time your web page is visited.

  • 😬

    That eqautes to{{ gramsToHuman(data.emissions * 12 * pageviews) }} of CO2e per year based on monthly page views.

  • 🚗

    This is the equivalent of driving an electric car for {{ Math.ceil(data.size * 12 * pageviews * energy_conv * tesla_conv)}}miles and would require {{ Math.ceil(((data.emissions * 12 * pageviews) / 21) / 1000) }} trees to offset.

  • Our calculations show that you could reduce your website carbon emissions by {{ Number.parseFloat(((data.emissions - data.target) / data.emissions) * 100).toFixed(1) }}%

    Over a year this could be a saving of {{ gramsToHuman((data.emissions - data.target) * 12 * pageviews) }} of CO2e as well as improving website performance across speed and search.

    Want to find out more?

    Add your email address to be sent this report, as well as how to take action on reducing your website carbon footprint and improving performance.

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Why a Sustainable Web Matters

Internet carbon footprint accounts for 3.7% of global emissions, comparable to the aviation industry, and will account for up to 20% of the world’s electricity consumption and 5.5% of global carbon emissions by 2025. This makes websites, hosting, and media silent contributors to business carbon footprints.

To put this into context, the average unoptimised website with 10,000 monthly page views can produce 120kg+ of CO2 per year – the same as driving about 300 miles in an average car.

Customers, investors, and supply chains now expect clear, visible climate action—and digital assets are the primary touchpoint for most businesses.

We want to reduce the barriers for businesses to take action on digital sustainability. We created this free tool to estimate the carbon emissions attributed to a website, helping to create understanding and progress on a more sustainable internet.

If you’d like help with a detailed analysis of your digital emissions or optimising your digital assets, then get in touch for an initial chat.

FAQs

Questions? We're glad you asked

The grades have been created by the team at Sustainable Web Design to give a more understandable rating for the impact of our digital products.

Here’s how this rating system works:

Rating

HTTP Archive Transfer Size (kb)*

Grams CO2 Per Pageview (SWDM v.4)

A+

272.51 (5%)

0.040

A

531.15 (10%)

0.079

B

975.85 (20%)

0.145

C

1410.39 (30%)

0.209

D

1875.01 (40%)

0.278

E

2419.56 (50%)

0.359

F

≥ 2419.57

≥ 0.360

* Percentile data for transfer size has been pulled from the June 1, 2023 crawl of the HTTP Archive.

Read about this rating system in more detail here. (https://sustainablewebdesign.org/digital-carbon-ratings/)

We calculate the the data size of the page and find out whether the host uses renewable energy before putting those figures into the OneByte model, which returns a number for the estimated CO2 emissions for the corresponding number of bytes sent over the wire. You can read more about this methodology here.

Using the emissions data of the first visit to the url provided as well as a second visit where page size is reduced, we combine these two numbers using the ratio of 70% new visitors and 30% returning visitors to create an average per visit.

The internet uses a lot of electricity and a lot of that energy comes from the grid where we don't use 100% renewable energy; it uses it for three distinct areas: servers, network and devices. Our tool calculates the impact based on data transmission which we can accurately measure and using the OneByte methodology. Please see this article for more information.

Please report any issues to us by emailing hello@easygreen.digital

Yes. We plan to add more features from our internal tools to the free, public tool in the future. If you have specific requests or recommendations then please get in touch.

Yes. Get in touch and we talk through your requirements and our services.

Our mission

Help 1000 businesses run greener, faster, cheaper websites.

EasyGreen is a sustainable digital partner to SMEs.

Bloated, slow websites cost your business and the environment. A low-carbon website is a high-performing website.

We help businesses optimise, build and run high-performance websites at lower costs while significantly reducing their digital carbon footprint.

 

Our Services

Our services and business model are designed so that SMEs can access expert, cutting-edge sustainable digital services at low, transparent costs.

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Take action on digital sustainability

Work with EasyGreen to take action on digital sustainability and contribute to your business's net-zero goals, while improving digital performance and business reputation.