Expertise
put into practice
As engineers and PhDs, we produce detailed studies for organisations seeking to understand, manage and communicate their climate strategy.
We make rigorous technical expertise accessible, concise and visually clear.
Our expertise, freely available
Methodology guides made in Celsius
59 detailed English guides by our consultants: methods, comparisons and project experience. Each article is designed as a comprehensive guide to its subject.
DPP: the digital product passport
DPP: the digital product passport
What the DPP changes for European manufacturers.
Read the guide (in French)EU Batteries Regulation: complete guide
EU Batteries Regulation: complete guide
Carbon footprint, recycling and the digital passport.
Read the guide
PEF: European product footprint method
PEF: European product footprint method
Understand the EU Product Environmental Footprint.
Read the guide (in French)
Your first product LCA: complete guide
Your first product LCA: complete guide
A step-by-step method for carrying out your first LCA.
Read the guide
Ecobalyse: complete guide to the textile score
Ecobalyse: complete guide to the textile score
Understand the official textile environmental labelling tool.
Read the guide
How much does a Bilan Carbone® cost in 2026?
How much does a Bilan Carbone® cost in 2026?
Actual prices, available support and budgets by company size.
Read the guideCSRD for SMEs: compliance guide
CSRD for SMEs: compliance guide
Obligations, timeline and action plan for SMEs.
Read the guide
Diag Décarbon'Action: complete guide
Diag Décarbon'Action: complete guide
Eligibility, process and Bpifrance funding.
Read the guide
How much does an LCA cost? Budget, timing and support
How much does an LCA cost? Budget, timing and support
Price ranges, typical timings and available funding.
Read the guideInteractive tools
Our tools freely available
Estimators and checkers calibrated to our projects. No form, an answer in under 3 minutes.
Bilan Carbone® price estimator
Your price range in 1 minute, calibrated to 2026 market rates and public funding.
Start the tool
AI carbon footprint calculator
The climate footprint of your AI queries, by model and task. Ecologits methodology.
Start the tool
Most of our projects are designed around your needs.
Contact us about your environmental measurement needs or any other question. A specialist will be happy to help.
Discuss your project for 15 minResource library
Publications and external sources
We have gathered the databases, calculators and reference frameworks used in our projects. Each includes our experience and expert assessment.
Our foundational reports
The publications underpinning our expertise
These reports provide the scientific and methodological foundation for every project we undertake.
Climate Change 2023 : Synthesis Report (AR6)
The state of global climate science
Read the report
Net Zero Roadmap
The global pathway to carbon neutrality
Read the report
Transformation Plan for the French Economy
Sector roadmap for decarbonisation
Read the report (in French)
Decarbonising healthcare for sustainable care
The decarbonisation plan for French healthcare
Read the report (in French)
Doing your part?
The power and responsibility of individuals, businesses and the state
Read the report (in French)
2024 annual report: Staying on course
Independent assessment of French climate policy
Read the report (in French)
Transition(s) 2050
4 scenarios for carbon neutrality in France
Read the report (in French)
Environmental footprint of digital services in France
Current impact of digital services and projections
Read the report (in French)
Bilan GES methodology guide
Reference method for carbon accounting
Read the report (in French)Our game
Carboniq, the carbon serious game
Designed by Projet Celsius engineers, Carboniq is an educational tool based on ADEME’s Base Carbone® database. It develops a quantified intuition for the orders of magnitude of greenhouse gas emissions.
Carboniq
The original game: 110 cards based on ADEME’s Base Carbone database
An awareness tool designed by our engineers to develop a quantified intuition for carbon orders of magnitude. Used in companies, local authorities and higher education.
Carboniq European Edition
International edition in English
An adaptation for international teams. Used by large European groups to train employees on climate through an engaging, rigorous format.
Carboniq Santé
In partnership with AP-HM
A specialist edition co-developed with Assistance Publique - Hôpitaux de Marseille. Hospital-specific data to support healthcare decarbonisation.