Measure and communicate the environmental impact of your website with Karma Metrix
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The Karma Metrix assessment: measure your website’s emissions
Innovation and sustainability: our patented algorithm
Karma Metrix is innovation in the field of digital sustainability. Our algorithm is designed to analyze and quantify the environmental impact of your website, converting energy consumption into CO₂e emissions.
To date, we are the only web emissions measurement in Europe that has been awarded a patent.
What do we measure? Here are some examples
Our analysis covers a wide range of parameters to ensure a comprehensive assessment. Among these we have:
– Energy consumption and resource optimization.
– Efficiency in page loading.
– Ways of using multimedia content.
– Impact of hosting and infrastructure choices.
– Impact on end-user device power consumption.
We are aligned with reporting standards
Our methodology takes into account the geographical location of users and the type of energy used, providing an accurate estimate in terms of CO2 equivalent (CO₂e) emissions. This measurement is aligned with major environmental reporting standards, such as GRI 305 and the GHG Protocol Corporate Standard.
The Karma Metrix Banner: transparency on your website’s emissions
Upon completion of the measurement, we provide the Karma Metrix banner.
The banner shows the estimated CO2e emissions per page view of your website, the reference period of the data and a link to the method, data and limitations of the measurement. It is an estimate: it is not a certification and it only refers to the measured website.
Find the full list of issued banners in our directory.

How to use the Karma Metrix banner
The banner can be used for:
- Communication on your website (dedicated content, footer);
- Sustainability report, as information on the estimated emissions of the website;
- Social media and press releases;
- Any other form of communication.
Whenever it is used, the banner must be shown unmodified, together with the reference period of the data and the link to the method, data and limitations.
Join us for a sustainable digital future
With Karma Metrix, your website is not only a showcase for your business, but also an example of sustainability in the digital world. Find out how we can help you reduce your website’s environmental footprint and adopt more sustainable practices.
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