Work out your average diesel van (up to 3.5 tonnes) emissions
Each mile × 0.41386 kg CO2e, the 2026 UK government (DESNZ) factor.
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Average diesel van (up to 3.5 tonnes) emission factor by year
| Year | Scope 1 (kg CO2e per mile) | Well-to-tank | Full figure | Change |
|---|---|---|---|---|
| 2026 | 0.41386 | 0.098630 | 0.51249 | +0.6% |
| 2025 | 0.41138 | 0.098630 | 0.51001 | +2.1% |
| 2024 | 0.40273 | 0.098630 | 0.50136 | +8.2% |
| 2023 | 0.37224 | 0.091080 | 0.46332 | -0.1% |
| 2022 | 0.37268 | 0.094890 | 0.46757 | -4.0% |
| 2021 | 0.38811 | 0.094890 | 0.48300 | -2.4% |
| 2020 | 0.39767 | 0.095920 | 0.49359 | -2.0% |
| 2019 | 0.40576 | 0.097120 | 0.50288 | -1.8% |
| 2018 | 0.41328 | 0.098700 | 0.51198 | -0.3% |
| 2017 | 0.41439 | 0.099590 | 0.51398 | -3.1% |
| 2016 | 0.42773 | 0.088997 | 0.51673 | +6.3% |
| 2015 | 0.40232 | 0.087838 | 0.49016 | -0.4% |
| 2014 | 0.40382 | 0.088224 | 0.49205 | 0.0% |
| 2013 | 0.40382 | 0.086502 | 0.49032 | +0.8% |
| 2012 | 0.40078 | 0.085130 | 0.48591 | -1.1% |
| 2011* | 0.40539 | 0.077840 | 0.48323 | -0.3% |
| 2010* | 0.40647 | 0.077990 | 0.48446 | -7.6% |
| 2009* | 0.44010 | 0 | 0.44010 | +0.7% |
| 2008† | 0.43710 | 0 | 0.43710 | – |
Total kg CO2e for the seven greenhouse gases, from the official DESNZ files for each year. * For years before 2012 DESNZ republished electricity and heat only, so these come from the Defra/DECC conversion factor guidelines published that year. † Those editions give kg CO2 only, without methane and nitrous oxide. 2026 factor ID: 5_303_3102_9_1. Where a factor jumps sharply between two years, it is usually because DESNZ changed its method or data source, not because the activity itself changed.
Worked example
Take one van covering 20,000 miles a year. 20,000 miles × 0.41386 kg CO2e = 8.28 tonnes CO2e, reported as Scope 1. Adding well-to-tank brings the full figure to 10.25 tonnes CO2e; the extra 1.97 tonnes are Scope 3 category 3.
How to report it
Vans you own or lease are Scope 1. If you have fuel cards, report litres of diesel instead: it is more accurate and picks up the effect of load and driving style.
Vans driven by subcontractors on your behalf are their Scope 1 and your Scope 3.
Where the data comes from
You'll usually find it in mileage logs, telematics or MOT odometer readings, in miles. Keep the source documents: anyone checking your Carbon Reduction Plan or SECR report may ask how each figure was worked out.
Read more about how the factors change each year in our guide to the 2026 conversion factors, or see how we apply them in our methodology.
Related emission factors
- Diesel (forecourt): 2.5835 kg CO2e per litre
- Average battery electric van: 0.068560 kg CO2e per mile
- Average HGV (road freight): 0.10356 kg CO2e per tonne km
- All UK emission factors