Calculating a carbon footprint is a key step in helping a company understand the scale of its greenhouse gas emissions and identify opportunities to reduce them. Before starting the process, however, there is one fundamental question to ask: Do you need to measure your organisation’s overall emissions or those associated with a specific product?

Although these two approaches are related, they serve different purposes. Choosing the right one depends on what you want to assess, the information you need to provide to your customers, and the decisions you want to make based on the results.

Corporate Carbon Footprint

A corporate carbon footprint quantifies the greenhouse gas (GHG) emissions associated with a company’s activities over a given period, usually one year. Its scope is defined according to the organisational boundaries and emission sources included in the assessment.

These sources may include fuel consumption at company-owned or controlled facilities and vehicles, purchased electricity, and other indirect emissions associated with business activities, such as those resulting from certain materials, services or outsourced transport.

Emissions are commonly classified into three scopes:

• Scope 1: Direct emissions from sources owned or controlled by the company.
• Scope 2: Indirect emissions associated with the generation of purchased and consumed electricity, heat, steam or cooling.
• Scope 3: Other indirect emissions generated throughout the value chain, both upstream and downstream.

The scope of the inventory depends on the objectives of the assessment and the methodology applied. For example, a company may initially assess its Scope 1 and Scope 2 emissions before expanding the analysis to relevant Scope 3 categories.

In this context, ISO 14064-1 provides requirements and guidance for quantifying and reporting greenhouse gas emissions and removals at the organisational level.

When should a company calculate its corporate carbon footprint?

This approach is generally the most suitable when a company needs to understand and manage the climate impact of its own operations.

It can be particularly useful for:

• Establishing an emissions baseline and tracking performance year after year.
• Identifying reduction opportunities, for example through improvements in energy efficiency, production processes or fleet management.
• Meeting environmental reporting and information needs from customers, investors and other stakeholders.
• Assessing regulatory or procurement requirements, after determining which obligations apply to the company based on its specific characteristics and circumstances.

Ultimately, a corporate carbon footprint helps answer one key question: What emissions does our company generate, and where can we reduce them?

Product Carbon Footprint

A product carbon footprint (PCF) quantifies the GHG emissions associated with a product or service across the life cycle stages included in the assessment.

Unlike a corporate carbon footprint, which examines a company’s activities as a whole, this approach focuses on a specific product or service: for example, an automotive component, a packaging solution, a construction material or a transport service.

Depending on the objectives of the study, the assessment may cover the entire life cycle, from raw material extraction through manufacturing, distribution and use to end-of-life treatment. It may also focus on specific stages, provided that the partial scope is clearly defined and transparently communicated.

ISO 14067 establishes principles, requirements and guidelines for quantifying and communicating the carbon footprint of products, in line with the life cycle assessment principles set out in ISO 14040 and ISO 14044.

It is important to note that a product carbon footprint assesses a single environmental impact category: climate change. If a company also needs to understand other environmental impacts, such as water consumption, resource use or waste generation, a broader life cycle assessment (LCA) may be required.

When should a company calculate a product carbon footprint?

This approach is particularly relevant when a company needs to understand the climate impact of the products it manufactures, markets or the services it provides, rather than focusing solely on its overall operations.

It can be useful for:

• Identifying the life cycle stages with the greatest climate impact, from raw material sourcing to end-of-life treatment.
• Responding to customer requests for emissions data associated with specific products or services.
• Providing environmental information across supply chains, where traceability and transparency are becoming increasingly important.
• Supporting ecodesign decisions, supplier selection and process improvements.
• Preparing information for specific market requirements or environmental initiatives, after checking the applicable methodologies and rules.

This approach helps answer the following question: What emissions are associated with this product or service throughout its life cycle, and how can we reduce them?

Corporate Carbon Footprint vs. Product Carbon Footprint: Key Differences

Although both approaches quantify GHG emissions, they differ significantly in their scope and how their results are used. The main distinction lies in what we want to measure and what we intend to do with the results.

A corporate carbon footprint provides an overall picture of the emissions associated with a company’s activities over a given period. It is particularly useful for establishing a baseline, identifying the main sources of emissions and defining company-wide reduction measures.

A product carbon footprint, on the other hand, focuses on the emissions associated with a specific product or service across the life cycle stages included in the assessment. It helps identify where the climate impact is concentrated and assess opportunities for improvement related to materials, manufacturing processes, transport or product design.

Although they address different questions, these two approaches can complement each other. A company may need to understand its overall emissions to improve its environmental performance while also assessing specific products to meet customer demands or identify ecodesign opportunities.

Choosing the right approach is therefore not about determining which one is better, but about identifying the information the company needs and the decisions it wants to make based on it.

Which Carbon Footprint Does Your Business Need?

The best way to decide is to start with the challenge you want to address, rather than with the methodology.

If you need to understand the overall emissions associated with your business activities, establish a baseline and define a reduction plan, a corporate carbon footprint is probably the right starting point.

If you need to assess a specific product, compare materials or provide a customer with emissions data for a product or service, a product carbon footprint may be the most appropriate approach.

If you need to address both objectives, you can combine the two assessments. For example, an industrial company may calculate its corporate carbon footprint to manage its annual emissions while assessing the carbon footprint of selected products to identify ecodesign opportunities and respond to customer needs.

This distinction is also important in the transport sector: calculating a company’s emissions is not the same as calculating the emissions associated with a specific transport service. The latter requires a clear definition of the service being assessed, the relevant activity data and the applicable methodological rules.

From Measurement to Environmental Improvement

Calculating a carbon footprint is a starting point, not an end in itself. The real value of an assessment lies in turning the results into useful information that supports decision-making.

At the organisational level, this can lead to better energy management, operational changes and measurable emission reduction targets. At the product level, it can help identify materials, processes or life cycle stages where improvements can be made.

In both cases, data quality, the choice of methodology and a clearly defined scope are essential to obtaining consistent and useful results.

At LOMARTOV, we help companies assess their emissions through carbon footprint calculations and identify the most appropriate approach based on their objectives, activities and information needs. We also support broader environmental assessments, such as life cycle assessment (LCA) and ecodesign, when other environmental impacts beyond climate change need to be considered.

Not sure which type of carbon footprint your business needs? Get in touch with our team. We will help you define the most appropriate approach to turn environmental data into informed decisions and opportunities for improvement.