Email Carbon Calculator
The Email Carbon Calculator
Find out the carbon footprint of your email campaigns.
Estimate your email campaign carbon footprint:
Average Email
4g CO₂
Carbon emitted per standard email
With Attachments
50g CO₂
Carbon emitted with large attachments
Global Impact
300M tons
Annual CO₂ from emails worldwide
How we calculate your email carbon footprint
Email Size
We estimate the size of your email including all content and attachments
Server Energy
We calculate the energy used by servers to process and store your email
Recipient Count
We factor in the number of recipients to calculate total carbon impact
Server Energy Methodology
Our server energy calculations are based on a comprehensive model that accounts for the entire email lifecycle:
Data Center Energy
We use industry-standard metrics of 0.008 kWh per GB of data processed in modern data centers, accounting for server operations, cooling systems, and network infrastructure.
Transmission Energy
Email transmission across networks consumes approximately 0.002 kWh per GB of data, factoring in routers, switches, and transmission infrastructure.
Storage Calculations
We estimate 0.001 kWh per GB per month for email storage, multiplied by an average retention period of 36 months across all recipients' inboxes.
Carbon Conversion
Energy consumption is converted to carbon emissions using a global average of 442g CO₂ per kWh, adjusted based on regional energy grid carbon intensity where possible.
Formula
Email Carbon Journey
Composition
Email created and stored on sender's server
Transmission
Email sent through network infrastructure
Reception
Email received and processed by recipient servers
Storage
Email stored in recipient inboxes for months
Composition Energy
When you create an email, your device and the email server consume energy. The server processes the email, validates addresses and prepares it for sending. This consumes approximately 0.003 kWh per email, depending on size and complexity.
⚠Attachments significantly increase energy consumption
Our methodology is regularly updated based on the latest research and industry data on data center efficiency and energy consumption patterns.
Frequently asked questions
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