The purpose of this calculator is to give an environmental assessment of a functional unit, i.e. a user path according to measurable criteria on which the various digital professions can act. More informations here:
CHOOSE YOUR VERSION
Complete will need more informations and technical specifications
Will be used to launch calculation automatically - Coming soon !
Number of pages inspected
Your functional unit page numbers
Use the Green IT
analysis tool to
score your journey
PAGE #_number_ ANALYSIS
Will be use to automate calculation and tips
Plugin Score for the page #_number_
Greenhouse Gases Emission for the page #_number_ (g CO2eq)
ANALYSIS: Number of HTTP requests
ANALYSIS: Page Weight
ANALYSIS: DOM Complexity
Number of visits per year for the page
The lower the better. Calculated using DOM complexity / Page size and number of HTTP Requests
Less HTTP Request = less
network usage = less server usage = better performance
Page weight causes
network usage and can cause low local performances
It is recommended that the pages contain less than about 1 500 DOM elements for better accessibility.
Each visit generates network consumption, server
consumption and device obsolescence
kg CO2 eq
Number of API request per
M2M connection consumes network and CPU usage So have an
kg CO2 eq
Specific Mobile Version (Responsive at least) ?
Mobile / Tablet in %
Laptop / Desktop in %
Mobile phone or tablet have less memory and CPU capacity. DOM and
Http Request will impact more these devices
Wifi Usage rate in %
4G Usage rate in %
4G network emits 4 times more than Wifi Usage
kg CO2 eq
STORAGE (include replication if some)
Application Files Size (Mo)
Media Files Size (Mo)
Database Size (Mo)
Log size (Mo)
Each byte stored consumed energy and need equipment to be used. Manufacturing servers consumes lots of energy wich emits greenhouse gases.
Is there a old media deletion policy?
Is there a database lifecycle policy?
Is there a logs deletion policy?
log retention time in years
Consider deleting old media when not used
Databases are rarely purged from old data
Logs must be deleted when not used
Depending of the activity, when can consider deleting logs could be
done once a year
Server Country ?
Depending on the country, the CO2eq emission factor differs
XX % of the impact in datacenter is due to energy consumption
Consider bringing your servers closer to your users
kg CO2 eq per year
How are the scores calculated?
What's this calculator for?
The purpose of this calculator is to give an environmental assessment of a functional unit, i.e. a user path according to measurable criteria on which the various digital design professions can act.
What is a functional unit?
A functional unit consists of defining a user path on a digital service. For instance: Order a white tee shirt for men on the ecommerce website XX or Look for a tip to buy women's skis on the XX site.
We do not model the impact of a single page because it is only viable for a complete business act.
Which environmental indicator?
The calculator uses the Greenhouse Gas environmental indicator to assess the environmental impact.
Two models are proposed:
Simple: when the technical parts are not easily accessible
Complete: when a major part of the data is accessible. It is often necessary to have the help of technical people.
The visibility of the application will automatically connect to the diagnosis delivered by Google's PageSpeed Insight.
Environmental Calculation Greenhouse Gases
Page impact - EcoIndex
Calculation based on EcoIndex.
At least 2g CO2eq per web page displayed + calculation depending DOM complexity / HTTP requests and Page size.
The 2g CO2eq impact is calculated according to a LCA from a large website.
Impact of 1GB stored in the Cloud for one year
Calculations made on the assumption of a 40TB storage bay used 6 years redundant.
The use phase is evaluated according to the impact factors of different countries.
Impact of API
API transfers or other inter-server transfers (also called M2M - Machine To Machine)
do not include the end user's restitution part, which corresponds to 60% of the CO2 impact eq .
As a result, the impact of an API flow is equivalent to 40% of the impact of a conventional flow (i.e.
40% of 2g CO2eq). (Source: GreenIT)
Each question is scored out of 10 for maturity.
The functional part is rated out of 100 because the eco-design is based on 60%.
on reducing the functional scope.