How to Calculate a Company's Carbon Footprint Step by Step (Practical Guide 2025)


26 June, 2025

With growing ESG requirements and regulations such as CSRD, calculating the carbon footprint becomes not only an environmental responsibility but also a business requirement. In this guide, we explain step by step how to professionally and in accordance with international standards calculate an organization's carbon footprint.

A hand holding a sphere with 'CO₂' and a cloud

Spis treści

What is an organizational carbon footprint?

An organizational carbon footprint is the sum of greenhouse gas emissions expressed in CO₂ equivalent (CO₂e) resulting from a company’s operational activities over a given period (usually a calendar year).

Standards and methodology

The most commonly used standard for calculating the carbon footprint is the Greenhouse Gas Protocol (GHG Protocol) – developed by WRI and WBCSD. It includes three emission scopes:

Emission scopes – detailed approach

The selection of scopes depends on the purpose of the calculation, reporting requirements, and the organization’s ESG maturity.

Note: Scope 3 often accounts for over 70% of an organization’s emissions – it should not be ignored!

NEOGAGE CFP application displayed on a computer, tablet, and phone

How to calculate a company’s carbon footprint – step by step

Step 1: Define the purpose and boundaries of the calculation

Step 2: Identify emission sources

Step 3: Collect activity data

Step 4: Apply appropriate emission factors

Step 5: Calculate emissions

After collecting data and assigning appropriate emission factors, you can proceed with the actual calculations. For each emission category, multiply the amount of resource used by the emission factor (usually expressed in kg CO₂e per unit, e.g., kWh, liter, km, kg, etc.).

General formula:
Emissions (kg CO₂e) = Activity × Emission factor

Step 6: Data validation and analysis

Calculating the carbon footprint is just the beginning of making a real environmental impact and ensuring ESG compliance. Key steps at this stage:

  1. Emission structure analysis:
    Identify areas generating the highest emissions. Is it energy, transport, production, purchases? This will help you set reduction priorities.
  2. Year-on-year comparison:
    Monitor the carbon footprint cyclically – preferably annually. This allows you to assess the effectiveness of reduction actions and set goals for subsequent periods.
  3. Benchmarking:
    Compare with other companies in the industry or capital group if you have access to comparative data.
  4. Implementing reduction and offset strategies:
    Based on the results, plan specific actions: e.g., switch to renewables, optimize logistics, supply chain changes, emission offsetting.

Step 7: Reporting and interpretation

Emission Calculation Examples

Electricity

Consumption: 1,000 kWh per year
Emission factor: 0.8 kg CO₂e/kWh
Calculation:
1,000 kWh × 0.8 kg CO₂e/kWh = 800 kg CO₂e/year

It can be used in Scope 2 carbon footprint analysis (purchased energy).

Car Transport (Passenger Vehicle)

Annual mileage: 10,000 km
Average fuel consumption: 6 l / 100 km
Emission factor: 2.31 kg CO₂e/l
Calculation:
(10,000 km ÷ 100) × 6 l × 2.31 kg CO₂e/l = 1,386 kg CO₂e/year

It can be used in Scope 1 carbon footprint analysis

Example Data for a Small/Medium IT Company

Assume a company with:

Scope 1 – Direct Emissions

Related to fuel combustion in company vehicles, boilers, generators.

Company car (gasoline):

Scope 2 – Indirect Emissions (Electricity and Heat)

Purchased energy for the office (lighting, computers, servers, air conditioning, etc.)

Office electricity consumption:

Scope 3 – Other Indirect Emissions

Employee commuting (on average 3 days/week to the office):

Remote work (20 people × 200 days):

Paper purchase:

Cloud services (e.g., Google Cloud / AWS – average):

Total Scope 3:
15,120 + 1,971 + 120 + 5,000 = 22,211 kg CO₂e / year

Summary of the Total Carbon Footprint of the IT Company:

Scope Emissions CO₂e/year

Emissions from heat, gas, air transport, material purchases, or business travel are calculated in a similar way—depending on the scope of the carbon footprint (scope 1, 2, 3).

Most common mistakes and challenges

Supporting tools – NEOGAGE Carbon Footprint

Our system:

What next after the calculations?

Calculating the carbon footprint is just the beginning. The next steps should be to:

Want to simplify the whole process?

Get to know the NEOGAGE Carbon Footprint application and see how we can jointly reduce emissions and meet ESG requirements.