Product carbon footprint in industrial companies: how to calculate it and where to start

You know you need to calculate the carbon footprint of your products. Maybe a client is asking for it, maybe you saw it in a tender, or maybe it has simply been sitting on your to-do list for months without knowing where to start.

The problem is not a lack of willingness. It’s that, the moment you start thinking about how to do it, too many questions appear at once: what data do I actually need? Which methodology should I apply? Do I need to hire someone? Is this going to disrupt operations?

This article is meant to help you get past that deadlock. We are not going to explain why product carbon footprint matters — you already know that. What we are going to explain is why most industrial companies get stuck when trying to tackle it, and how to unblock the process.

The initial mistake: believing you need everything before you start

The most common trap is thinking that, in order to calculate a product’s carbon footprint, you need perfect data, a fully defined methodology, and an expert validating everything from day one. With that mindset, nothing ever gets started.

One of the reasons industrial companies get stuck is that they wait until all the information is consolidated before beginning. And that moment never comes, because energy consumption data sits in one system, material purchases are recorded in another, and supplier information lives in an Excel file someone updated six months ago.

The key is not to wait until you have perfect data, but to understand which data is actually necessary for a solid first calculation and which parts can be estimated or left for a second iteration.

Because the reality is that the first product carbon footprint calculations are reasonable approximations, based on the data available at the time, with assumptions clearly documented. And that is enough to get started, respond to a customer, and build the foundations of a process that improves over time.

The three most common roadblocks (and how to overcome them)

1. “I don’t know which methodology to apply”

The short answer: ISO 14067 for product carbon footprint, with a cradle-to-gate scope as your starting point.

It is the most widely used reference, the one requested by most industrial customers, and the one accepted by auditors. To get started, you simply need to understand which life cycle stages are included and what data is required for each of them.

2. “I don’t have the resources to do this internally”

Product carbon footprint calculation does not require a dedicated team or months of consulting work. It requires a clear process and the right tools.

The real problem is usually not a lack of people, but a lack of systemization: data scattered across multiple sources, emission factors that need to be searched manually, Excel calculations someone has to reconcile, and reports that need to be rebuilt every time a new request arrives.

With that workflow, any company would struggle.

The difference lies in automating what is currently done manually. When data collection, emission factor application, and report generation are integrated into a single platform, one person can manage multiple products, multiple customers, and multiple reporting formats without every request becoming a new project.

3. “Every customer asks for something different”

This is the most frustrating roadblock — and the most real.

One customer asks for the data in an Excel file with their own columns, another sends a form with a different methodology, and a third requires the calculation to be externally verified. If you treat every request as a separate project, the effort grows indefinitely.

The solution is not to adapt from scratch to every format. The solution is to build a solid baseline calculation from which you can extract whatever each customer needs.

If you identify with any of these roadblocks, at Manglai we have prepared a guide for suppliers who need to respond as quickly as possible to product carbon footprint requests from their customers.

Inside, you will find:

• How to interpret exactly what your customer is asking for
• Which data you actually need
• How to structure your first calculation so you do not have to rebuild it every time a new request arrives

What you actually need to get started

Instead of an impossible checklist, this is the minimum you realistically need to begin:

• Identify the product or product family you will calculate first (start with the one customers request most often or the one most representative of your production)
• Access your production process energy consumption data, even if it is approximate
• Know the main materials included in the product and their quantities per unit
• Decide which scope you will cover in this first phase (cradle-to-gate is enough to begin)

With that, you can build a reasonable first calculation. Not perfect, but defensible, traceable, and sufficient to respond to most customer requests.

From one-off responses to a scalable system

The goal is not to calculate the footprint of one product once and forget about it. The goal is to reach a point where the next request does not generate the same stress as the first one. That means being able to respond for more product references, different customers, and different formats without every request feeling like starting from zero again. It is not an impossible goal, but it does not happen automatically either. It requires building the process properly from the start.

In our supplier guide, you will find that exact roadmap — from understanding what your customer is really asking for to building a system that does not rely on someone remembering everything or recreating the process every single time. No unnecessary technical jargon. Designed for companies that need to move forward without disrupting operations.