How does the Website Carbon Calculator work?

CO2 estimate = page size (KB) × 0.06g CO2/KB Then: This accounts for data centre energy, network, and device power Then: Annual emissions = CO2 per view × annual page views Then: Green hosting can reduce emissions by 50–80%.

Can you give an example of how to use the Website Carbon Calculator?

Example: Input 500KB page, 10,000 views/month gives a result of ~30g CO2/month = 0.36kg/year.

Is the Website Carbon Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Website Carbon Calculator?

Our Website Carbon Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Practic

Website Carbon Calculator

Page Size (KB)

Monthly Page Views

A website carbon calculator estimates the CO2 emissions generated by a web page per visit, based on data transferred. The internet accounts for approximately 3.7% of global carbon emissions.

Symbol	Name	Unit	Description
MB	Page size	MB	Total data transferred (HTML, CSS, JS, images)
g_CO2	CO2 emissions	grams	Approximate carbon footprint per page view

Page Size	CO2 per View	Per 1M Views/Year
100 KB	0.006g	6kg
300 KB	0.018g	18kg
500 KB	0.030g	30kg
1 MB	0.060g	60kg
3 MB	0.180g	180kg
5 MB	0.300g	300kg

References

›Website Carbon Calculator — Wholegrain Digital
›Internet carbon footprint — IEA

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