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Email Footprint Calculator

How Much CO₂ Does Your Inbox Generate?

Emails seem weightless — but every send, receive, and stored message consumes energy. Enter your email habits below to calculate your annual carbon footprint and discover what a difference small changes can make.

Every undeleted email sits on a server, consuming energy 24/7.

Emails without attachments (~10 KB each)

Documents, images, PDFs (~300 KB each)

Understanding Your Results

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Data Centre Energy

Every email passes through data centres that store, process, and route your messages. These servers run 24/7 and consume significant electricity.

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Network Transmission

Data travelling across networks — from fibre cables to mobile towers — consumes energy at every hop between sender and recipient.

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Stored Emails

Emails you never delete sit on servers indefinitely. Regularly archiving or deleting emails you won't need is one of the simplest green actions you can take.

376 billion emails are sent every day worldwide — small habits add up fast.

Explore Our Digital Sustainability Academy