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The Carbon Workbench

Carbon Footprint Calculator for Consultants

Scope 1, 2 and 3 organisational carbon footprint analysis, using UK DESNZ 2024 emission factors with optional professional project reports.

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Free calculator

Run the footprint calculator free.

The calculator is free for first-pass organisational estimates. Create a free account to save assumptions, then unlock a professional report only when you need a branded client-ready output.

  • Estimate Scope 1, 2 and selected Scope 3 categories.
  • Use DESNZ-aligned factors for a practical first-pass estimate.
  • Save work free and unlock a branded report only when a client-ready handoff matters.
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Screenshot of the Business Footprint Calculator in The Carbon Workbench
Create an account to edit inputs, save runs and export results.

Why consultants use this tool

Carbon consultants, sustainability advisers and ESOS auditors need a fast, credible way to estimate an organisation's carbon footprint before committing to a full assessment. The Carbon Workbench Footprint Analyser gives you an activity-based Scope 1, 2 and 3 breakdown in under two minutes - without a spreadsheet, without importing data files, and without a large software contract.

The results include a breakdown by emission source, a headline tCO₂e/yr figure, and an offset cost estimate at Gold Standard pricing. All emission factors come from the UK Department for Energy Security and Net Zero (DESNZ) 2024 publication and IPCC AR6.

What the calculator covers

Scope 1 - Direct emissions

Scope 2 - Purchased electricity

Scope 3 - Value chain emissions

UK emission factors used

SourceEmission factorReference
UK grid electricity0.207 kgCO₂e/kWhDESNZ 2024
Natural gas0.183 kgCO₂e/kWhDESNZ 2024
Average car (petrol)0.170 kgCO₂e/kmDESNZ 2024
Short-haul flight0.151 kgCO₂e/km (×1.9 RFI)DESNZ 2024 + IPCC
Long-haul flight0.195 kgCO₂e/pkm (×1.9 RFI)DESNZ 2024 + IPCC
Rail commuting0.035 kgCO₂e/pkmDESNZ 2024

Carbon neutrality and ISO 14068-1

ISO 14068-1:2023 is the international standard for carbon neutrality claims. It replaced BSI PAS 2060, which BSI withdrew in 2025. A claim under ISO 14068-1 starts with a quantified footprint covering all material Scope 1, 2 and 3 emissions, followed by a reduction plan, offsetting of residual emissions with qualifying credits, and independent verification of the claim.

The Carbon Workbench Footprint Analyser covers the first of those steps as a screening estimate. It uses activity-based accounting (rather than spend-based) and applies UK DESNZ conversion factors. Use it for ESOS preliminary assessments, early carbon neutrality planning and client conversations; a formal claim still needs a full inventory and independent verification.

Using the footprint for offset planning

Once you have a tCO₂e/yr figure, the calculator shows an indicative offset cost at current Gold Standard market prices. This helps clients understand the order of magnitude of their offset liability before committing to a full abatement strategy.

For clients who want to discuss offset options, The Carbon Workbench can help connect footprint estimates with suitable Gold Standard project pathways including cookstoves, safe water and renewable energy.

Run a footprint estimate free

Enter employee count, energy use and travel figures. Get Scope 1, 2 and 3 breakdown in seconds.

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