Free tool · Lean service design
Service Carbon Impact Calculator
What could change if you reduced unnecessary travel, coordinated your workforce better and made smarter use of existing facilities?
- Compare before & after
- UK 2026 conversion factors
- No account required
- No data uploaded
01 / Start with activity
Enter annual travel and energy use under your current model.
02 / Model a change
Enter a realistic new model: remote delivery, locality scheduling or venue reuse.
03 / Review the difference
Compare indicative CO₂e and export a transparent summary.
Interactive calculator
Your delivery scenarios
Enter annual activity totals, not numbers of people. A smaller proposed figure represents reduced activity; a higher figure shows an increase rather than hiding it. Round-trip distances must already be included in the kilometres you enter.
Illustrative example loaded — these figures are hypothetical, not actual Living Well Partners or customer emissions. Change them or choose Clear all.
Business travel and commuting use vehicle kilometres; rail uses passenger kilometres. The same published 2026 factor is applied to both scenarios, so changes reflect activity rather than a change of reporting year.
Service-user travel is shown separately. It may sit outside the reporting organisation’s emissions inventory — do not add it to corporate totals without checking the accounting boundary.
Indicative results update instantly
Indicative organisation activity emissions
Current
7,372.5 kg
kg CO₂e / year (indicative)
Proposed
4,939.3 kg
kg CO₂e / year (indicative)
Estimated reduction
2,433.2 kg
33% reduction
What this means
The proposed organisation activities are estimated to be 33% lower in this simplified model. Check all omitted or additional emissions before making external claims.
Separate indicative service-user travel estimate
Service-user travel: current
3,484.1 kg
kg CO₂e / year (indicative)
Service-user travel: proposed
1,161.4 kg
kg CO₂e / year (indicative)
Estimated reduction
2,322.7 kg
66.7% reduction
A change in delivery should also consider digital infrastructure, remote-working energy and any extra journeys or facilities required. This quick tool does not calculate those impacts unless they appear in the activity inputs above, and makes no assumptions about embodied carbon avoided by reusing existing technology.
Methodology and transparency
This is an indicative before-and-after scenario calculator, not a full corporate carbon footprint, a verified emissions reduction claim or a procurement-compliant Carbon Reduction Plan.
Factors used — UK 2026
| Activity | Factor | Unit |
|---|---|---|
| Average car, unknown fuel | 0.16591 | kg CO₂e / vehicle-km |
| National rail | 0.03092 | kg CO₂e / passenger-km |
| UK grid electricity generated | 0.13096 | kg CO₂e / kWh |
| Natural gas combustion, gross calorific value | 0.18231 | kg CO₂e / kWh |
Factor year: 2026. Publication: Department for Energy Security and Net Zero (DESNZ), UK greenhouse gas reporting conversion factors 2026 (opens in a new tab).
How are the results calculated?
For each activity, kilograms CO₂e = annual activity × its 2026 factor. Current and proposed totals are calculated separately using the same factors. The difference is current minus proposed; a negative difference is shown as an increase. Service-user travel is displayed separately from the organisation scenario. This simplified calculator excludes upstream well-to-tank fuel emissions, transmission and distribution losses, equipment production, paper, cloud and digital services, and any other impacts not entered.
Can I use this as my NHS or council Carbon Reduction Plan?
No. A formal Carbon Reduction Plan requires a defined reporting boundary, baseline and current-year reporting, the required Scope 1, 2 and 3 categories, governance and approvals, and the applicable procurement format. For NHS supply, consult NHS England’s 2027 requirements (opens in a new tab). This tool is for exploring potential delivery changes only.
Is my information stored?
No. Calculations run in your browser. Your entries are not sent to a server and no account is created. If you print or export results, the files are handled on your own device.
Our work with organisations
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