Calculator

Two modes, one engine

Manufacturer source: matched product phases are used when their model, configuration and totals are consistent. Missing phases are estimated separately. The original manufacturer total remains visible as a reference, with its own region and service life.

Model estimate: available specifications feed a parametric or category model. Source quality and modelling assumptions are shown separately. No universal ±5% accuracy or statistical confidence interval has been established.

The fields that look optional but aren't

• Country — drives the grid factor for the use phase. Wrong country, wrong use-phase number. The grid factor for Norway is radically different from Poland.
• Lifetime sets the years of electricity use. The default comes from an applicable source or category profile; choose the service life relevant to your scenario.
• Weight (kg) — anchors the production model. Without it, parametric falls back to a category average and accuracy drops.

Reading the result

The result is kg CO2e per device over the selected service life, split into four phases. It is not automatically your company’s emissions for one year:

• Production is the manufacturing footprint; its share varies strongly by product and usage.
• Transport — from factory to first customer. Generally small, but fluctuates with shipping mode.
• Use phase — electricity consumed during operation, weighted by the country grid factor.
• End-of-life is the manufacturer phase or a separate recovery model. Recovery credits and hypothetical refurbishment savings are distinct.

The methodology card records the inputs, factors, source references and model assumptions. Missing measurements or source phases remain explicit.

Reuse savings

Reuse compares the same number of future service years with an explicitly assumed new purchase. Refurbishment also includes estimated processing and component replacement. These scenario savings are shown separately; do not subtract them from the corporate inventory or Category 11.

Common questions

• The number looks high. Check the exact model, configuration, energy consumption, country, lifetime and source phase boundaries before interpreting the result. A database match alone does not prove accuracy.
• Why does swapping country change the result? Use phase scales with the local grid's carbon intensity. Same device in France (low-carbon nuclear) versus Poland (coal-heavy) lands at different totals.
• Can I change lifetime? Recalculate with new inputs or update an unlocked asset. A new calculation version is stored; a certified source remains frozen.