Website Carbon Calculator

Estimate how much CO₂ your website produces per page view — and get actionable tips to reduce your digital carbon footprint.

Website URL

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A Carbon Grade

0.00 g CO₂ per page view

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Page size

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CO₂ / year*

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Trees to offset*

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Equiv. car km*

* Based on 10,000 monthly page views

Emissions breakdown

vs. web average (2.14g per view)

How to reduce emissions

Methodology: Page weight is estimated via resource timing & known benchmarks. CO₂ is calculated using the Sustainable Web Design model: data transfer × 0.81 kWh/GB × grid carbon intensity (442g CO₂/kWh) × device energy share. Green hosting multiplier applied where confirmed. Results are estimates — actual emissions vary by CDN, user device, and grid mix.

How digital carbon works

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Data = Energy

Every byte transferred consumes electricity in data centres, networks, and your device

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Energy = CO₂

Unless powered by renewables, that electricity comes from fossil fuels emitting CO₂

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Design matters

Lighter pages, green hosting, and efficient code dramatically cut your site's footprint