Product Carbon Footprint & LCA Calculators (ISO 14067)

Boundaries — cradle-to-gate vs cradle-to-grave

The system boundary is the first decision in any product footprint, and it changes the number more than the arithmetic does. Cradle-to-gate covers raw material extraction, transport and manufacture up to the point the product leaves the factory — the boundary most business-to-business footprints and supplier declarations use. Cradle-to-grave extends that to distribution, use and end-of-life, the full picture a consumer-facing claim needs.

Neither is more correct; they answer different questions, and a footprint quoted without stating its boundary is unreadable. A cradle-to-gate figure for a component is exactly what a downstream manufacturer needs to slot into their own assessment; a cradle-to-grave figure is what you need to compare two finished products a customer will actually use and discard. The cradle-to-gate calculator and the cradle-to-grave calculator build each under ISO 14067.

Pick your PCF calculator

Building a footprint from scratch, testing a method choice, or starting from a sector template? Go straight to the calculator.

Two sub-topic hubs split method from sector: PCF methods & boundaries (ISO 14067, allocation, frameworks) and sector product footprints (food, apparel, electronics, packaging).

Which PCF calculator do I need?

Build from scratch, interrogate a method, or start from a sector template — the answer decides the tool. This table maps each calculator to what it does and when to reach for it.

What each calculator covers

The cluster splits into three jobs: building a footprint under the core standard, interrogating the method choices that determine its credibility, and starting from a sector template when you want a fast, defensible first pass. Each calculator carries the boundary rules and factor set for one of those jobs.

Building the footprint — ISO 14067 cradle-to-gate & cradle-to-grave

The cradle-to-gate PCF calculator is the workhorse and the hero of this cluster: it builds a product footprint from material and process inputs up to the factory gate, under ISO 14067 (methodology). It is the right starting point for a business-to-business declaration or a component figure someone downstream will build on. The cradle-to-grave calculator extends the same boundary through distribution, use and end-of-life for a full life-cycle result (methodology) — the version a consumer-facing claim or a like-for-like product comparison needs.

Interrogating the method — allocation, sensitivity & framework choice

Three calculators address the decisions that separate a credible footprint from an arguable one. The allocation methods calculator handles the hardest of them — how to split emissions from a shared process across its co-products, by economic value, physical property or system expansion — since the choice can swing a result substantially (methodology). The sensitivity and hotspot calculator identifies which inputs dominate the total and which assumptions the result is most sensitive to, so reduction effort lands where it matters (methodology). The frameworks comparison calculator sets ISO 14067 against the EU’s Product Environmental Footprint and the WBCSD Pathfinder rules, so you can see how the rulebook you report under shapes the number (methodology).

Sector templates — food, packaging, apparel, electronics, beverages, construction

Six calculators start you from a sector-specific template rather than a blank inventory, each pre-loaded with the processes and factors typical of that product class. The food footprint calculator is the second hero — food footprints lean heavily on agricultural life-cycle data such as the Poore & Nemecek dataset (methodology). Alongside it sit templates for packaging (methodology), apparel and textiles (methodology), electronics (methodology), beverages (methodology), and construction materials. The construction-materials template overlaps the embodied-carbon cluster — it produces a product-level material footprint, where the whole-building side lives in the embodied carbon calculators hub.

Allocation — the choice that moves the number

Allocation is the question that causes the most product-footprint disputes, so it is worth stating plainly. When one process produces more than one useful output — a dairy yielding milk and cream, a refinery yielding several fuels, a mill yielding grain and bran — the emissions have to be divided among them, and there is no single physically correct way to do it. The three recognised approaches give different answers: economic allocation splits by the market value of each co-product, physical allocation splits by a physical property such as mass or energy content, and system expansion credits a co-product with the emissions it displaces elsewhere.

ISO 14040/44 sets a hierarchy — avoid allocation by subdivision or system expansion where you can, then allocate by a physical relationship, then by economic value as a last resort — but real products rarely allow the cleanest option, so the choice is often unavoidable and always consequential. The honest position is that the allocation method is a reported assumption, not a hidden one: two footprints are only comparable if they used the same method, and a result quoted without naming its allocation basis is incomplete. Recycled content raises the same question in a sharper form, since the credit for recycling can be assigned to the product that supplies the scrap or the one that uses it, but not both.

How the numbers are built

Every calculator here follows the same chain — life-cycle inventory (the material and energy flows of each process) multiplied by characterisation factors that convert each greenhouse gas to carbon dioxide equivalent using its global warming potential. The framework sits on ISO 14067 over the ISO 14040/44 LCA method, with EPD-style declarations governed by ISO 14025; inventory data draws on sources such as the ecoinvent database and, for food, the Poore & Nemecek dataset. Where only spend data is available rather than physical inventory, the sector templates fall back to environmentally-extended input-output factors — the same MRIO basis a spend-based screen uses.

The single biggest driver of a PCF number is the boundary — where the assessment starts and stops. ISO 14067 splits the life cycle into these stages, and the two boundary calculators differ only in where they draw the line:

A cradle-to-gate figure ends at the factory gate — right for comparing suppliers or feeding a downstream assembler. A cradle-to-grave figure adds distribution, use and disposal, which for energy-using products often dominate. Comparing a gate figure against a grave figure is the most common PCF error.

The framework you report under is itself a provenance choice. ISO 14067, the EU Product Environmental Footprint and the WBCSD Pathfinder rules differ on allocation defaults, biogenic-carbon treatment and required boundaries, so the same product can carry different published figures under each — legitimately. Each calculator states the framework and factors it applied, and every value is versioned and traceable in the MasterBrain data layer, so you can see which dataset and vintage produced a number. Each calculator has a matching methodology page setting out its boundaries and assumptions.

Underneath every PCF is one universal step: each greenhouse gas is converted to CO₂-equivalent by its global warming potential. Those characterisation factors are read live from the data layer at MasterBrain v2026.110 (IPCC AR6, 100-year):

After your first number

A product footprint feeds outward in two directions. Upstream, it becomes a line in a corporate inventory — a supplier’s product footprint is a buyer’s Scope 3 Category 1 purchased-goods emission, which is where the spend-based screening in the wider inventory clusters hands off to primary product data. Downstream, a credible footprint underpins a product claim, an EPD, or a reduction target on the product itself. The related embodied carbon calculators hub shares the same LCA standards pool for building materials and whole buildings, and its construction-materials work overlaps the sector template here.

If you are working at organisation rather than product level, the organizational & sector footprint calculators give a whole-entity baseline, and the full carbon calculator directory covers every source-level tool an inventory draws on.