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Last reviewed August 2026
Authored by Jeremiah Say

Lead Systems Architect at GreenCalculus. Translates GHG Protocol methodology into high-precision JavaScript calculation engines. Architect of the MasterBrain data layer covering 1,000+ environmental tools, aligned with IPCC AR6 and the GHG Protocol Corporate Standard (2026 revision).

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EV Charging Emission Factors

89 ev charging emission factors held in the GreenCalculus MasterBrain, drawn from UK DEFRA/DESNZ 2026. Values are read live from the data layer on every page build, so nothing here is re-typed and nothing can drift from the figures the calculators use. They span 2 units of measurement — 58 of them in kg CO2e per km — which is why the spread below is reported per unit and never blended.

Where these factors are used

Scope 2 Electricity Emissions and EV vs Petrol Vehicle Lifecycle Emissions set out how factors in this group are applied, and EV vs Petrol & Diesel Lifecycle Carbon Calculator and Scope 2 Electricity Calculator draw on them directly. Each value below names the upstream source it came from.

What this group contains

What this group contains
MeasureValue
Factors89
Publishers1
Distinct units2
Data versionMB v2026.110 · updated 2026-08-08
Spread of values, by unit — computed from the 89 factors in this group
UnitFactorsLowestMedianHighest
kg CO2e per km580.000520.006280.0453
kWh per km310.038630.187320.34451

Figures are computed per unit and never blended: a median across different units would be arithmetically valid and physically meaningless.

What has changed

What has changed — 87 of these factors have been revalued since tracking began
FactorWasNowChangeEdition
DEFRA UK EV charging (BEV, MPV) — kgCO2e per km0.047090.03005-36.2%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Class III (1.74 to 3.5 tonnes)) — kgCO2e per km0.068870.0453-34.2%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Average (up to 3.5 tonnes)) — kgCO2e per km0.063150.0426-32.5%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Class II (1.305 to 1.74 tonnes)) — kgCO2e per km0.052290.03709-29.1%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Lower medium) — kgCO2e per km0.034830.02528-27.4%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Medium car) — kgCO2e per km0.035130.02563-27.0%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Large car) — kgCO2e per km0.038070.0279-26.7%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Luxury) — kgCO2e per km0.044380.03253-26.7%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Average car) — kgCO2e per km0.036630.02686-26.7%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Dual purpose 4X4) — kgCO2e per km0.038260.0281-26.6%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Supermini) — kgCO2e per km0.034190.02522-26.2%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Executive) — kgCO2e per km0.033510.02472-26.2%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Sports) — kgCO2e per km0.056670.04182-26.2%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Small car) — kgCO2e per km0.033390.02469-26.1%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Dual purpose 4X4) — kgCO2e per km0.013190.00977-25.9%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (BEV, Mini) — kgCO2e per km0.030050.02226-25.9%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Executive) — kgCO2e per km0.007930.00588-25.9%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Medium car) — kgCO2e per km0.009310.00691-25.8%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Lower medium) — kgCO2e per km0.0090.00668-25.8%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, MPV) — kgCO2e per km0.016740.01243-25.7%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Supermini) — kgCO2e per km0.024080.01791-25.6%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Small car) — kgCO2e per km0.024080.01791-25.6%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Upper medium) — kgCO2e per km0.009640.00718-25.5%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Average car) — kgCO2e per km0.011710.00873-25.4%MB v2026.4 · 2026-06-18
DEFRA UK EV charging (PHEV, Large car) — kgCO2e per km0.012660.00944-25.4%MB v2026.4 · 2026-06-18

Change history is reconstructed from every released edition of the data layer, v2025.13 to v2026.107. A factor absent from this table has held the same value throughout. A change shown as a dash moved off zero, where a percentage has no meaning. 62 further revalued factors are not listed here.

Sources, citation & machine access

Where these factors come from
SourcePublisherYearLicence
UK Government GHG Conversion Factors 2026Department for Energy Security and Net Zero (DESNZ)2026Open Government Licence v3.0

Cite the upstream publisher for the values themselves. The reference below credits this compilation and, more usefully, pins the edition you read.

Say, Jeremiah (2026). EV Charging Emission Factors (MasterBrain v2026.110). GreenCalculus. https://greencalculus.com/factors/ev-charging-emission-factors/

Cite this factor group

Values change between editions. Quoting the MasterBrain version is what lets a reader resolve the exact number you used — see the change record above for factors in this group that have moved.

For a reference manager — BibTeX, then RIS:

@misc{greencalculus_ev_charging_2026,
  author       = {Say, Jeremiah},
  title        = {EV Charging Emission Factors},
  year         = {2026},
  howpublished = {GreenCalculus},
  note         = {MasterBrain v2026.110},
  url          = {https://greencalculus.com/factors/ev-charging-emission-factors/}
}
TY  - DATA
AU  - Say, Jeremiah
TI  - EV Charging Emission Factors
PY  - 2026
PB  - GreenCalculus
ET  - MasterBrain v2026.110
UR  - https://greencalculus.com/factors/ev-charging-emission-factors/
ER  - 

Every factor on this page is readable from the open endpoint. No key, no signup:

https://greencalculus.com/wp-json/greencalculus/v1/factors/ev_charging
curl -s "https://greencalculus.com/wp-json/greencalculus/v1/factors/ev_charging?limit=500"
import requests
rows = requests.get("https://greencalculus.com/wp-json/greencalculus/v1/factors/ev_charging", params={"limit": 500}).json()["factors"]
print(len(rows), "factors in ev_charging")

Or the same rows as a spreadsheet — every factor with its source, the edition it last changed in, and its own link:

https://greencalculus.com/wp-json/greencalculus/v1/factors-export?page=ev-charging-emission-factors

Download this table as CSV

Both responses carry an X-GC-Version header, so a consumer can detect a new edition without diffing the payload. The CSV filename carries the edition too, so two downloads months apart do not collide.

All factors

Ev Charging: Car — 72 factors
FactorValueUnitGasSourceLast changedCanonical key
DEFRA UK EV charging (BEV, Dual purpose 4X4) — kgCO2e per km0.0281kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H41v2026.4ev_charging.car.segment.dual_purpose_4x4.bev.charging_uk
DEFRA SECR EV energy use (BEV, Dual purpose 4X4) — kWh per km0.21227kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E38v2026.1ev_charging.car.segment.dual_purpose_4x4.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Dual purpose 4X4) — kgCO2e per km0.00279kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H38v2026.1ev_charging.car.segment.dual_purpose_4x4.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Dual purpose 4X4) — kgCO2e per km0.00977kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D41v2026.4ev_charging.car.segment.dual_purpose_4x4.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Dual purpose 4X4) — kWh per km0.0733kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D38v2026.1ev_charging.car.segment.dual_purpose_4x4.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Dual purpose 4X4) — kgCO2e per km0.00097kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D38v2026.1ev_charging.car.segment.dual_purpose_4x4.phev.td_loss_uk
DEFRA UK EV charging (BEV, Executive) — kgCO2e per km0.02472kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H35v2026.4ev_charging.car.segment.executive.bev.charging_uk
DEFRA SECR EV energy use (BEV, Executive) — kWh per km0.18732kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E32v2026.1ev_charging.car.segment.executive.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Executive) — kgCO2e per km0.00246kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H32v2026.1ev_charging.car.segment.executive.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Executive) — kgCO2e per km0.00588kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D35v2026.4ev_charging.car.segment.executive.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Executive) — kWh per km0.04383kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D32v2026.1ev_charging.car.segment.executive.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Executive) — kgCO2e per km0.00058kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D32v2026.1ev_charging.car.segment.executive.phev.td_loss_uk
DEFRA UK EV charging (BEV, Lower medium) — kgCO2e per km0.02528kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H31v2026.4ev_charging.car.segment.lower_medium.bev.charging_uk
DEFRA SECR EV energy use (BEV, Lower medium) — kWh per km0.19151kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E28v2026.1ev_charging.car.segment.lower_medium.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Lower medium) — kgCO2e per km0.00251kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H28v2026.1ev_charging.car.segment.lower_medium.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Lower medium) — kgCO2e per km0.00668kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D31v2026.4ev_charging.car.segment.lower_medium.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Lower medium) — kWh per km0.05003kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D28v2026.1ev_charging.car.segment.lower_medium.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Lower medium) — kgCO2e per km0.00066kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D28v2026.1ev_charging.car.segment.lower_medium.phev.td_loss_uk
DEFRA UK EV charging (BEV, Luxury) — kgCO2e per km0.03253kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H37v2026.4ev_charging.car.segment.luxury.bev.charging_uk
DEFRA SECR EV energy use (BEV, Luxury) — kWh per km0.24698kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E34v2026.1ev_charging.car.segment.luxury.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Luxury) — kgCO2e per km0.00322kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H34v2026.1ev_charging.car.segment.luxury.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Luxury) — kgCO2e per km0.007kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D37v2026.4ev_charging.car.segment.luxury.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Luxury) — kWh per km0.05228kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D34v2026.1ev_charging.car.segment.luxury.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Luxury) — kgCO2e per km0.00069kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D34v2026.1ev_charging.car.segment.luxury.phev.td_loss_uk
DEFRA UK EV charging (BEV, Mini) — kgCO2e per km0.02226kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H27v2026.4ev_charging.car.segment.mini.bev.charging_uk
DEFRA SECR EV energy use (BEV, Mini) — kWh per km0.16881kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E24v2026.1ev_charging.car.segment.mini.bev.energy_use_secr
DEFRA UK EV charging (BEV, MPV) — kgCO2e per km0.03005kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H43v2026.4ev_charging.car.segment.mpv.bev.charging_uk
DEFRA SECR EV energy use (BEV, MPV) — kWh per km0.22719kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E40v2026.1ev_charging.car.segment.mpv.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, MPV) — kgCO2e per km0.00298kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H40v2026.1ev_charging.car.segment.mpv.bev.td_loss_uk
DEFRA UK EV charging (PHEV, MPV) — kgCO2e per km0.01243kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D43v2026.4ev_charging.car.segment.mpv.phev.charging_uk
DEFRA SECR EV energy use (PHEV, MPV) — kWh per km0.09288kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D40v2026.1ev_charging.car.segment.mpv.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, MPV) — kgCO2e per km0.00122kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D40v2026.1ev_charging.car.segment.mpv.phev.td_loss_uk
DEFRA UK EV charging (BEV, Sports) — kgCO2e per km0.04182kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H39v2026.4ev_charging.car.segment.sports.bev.charging_uk
DEFRA SECR EV energy use (BEV, Sports) — kWh per km0.31768kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E36v2026.1ev_charging.car.segment.sports.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Sports) — kgCO2e per km0.00414kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H36v2026.1ev_charging.car.segment.sports.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Sports) — kgCO2e per km0.00517kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D39v2026.4ev_charging.car.segment.sports.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Sports) — kWh per km0.03863kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D36v2026.1ev_charging.car.segment.sports.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Sports) — kgCO2e per km0.00052kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D36v2026.1ev_charging.car.segment.sports.phev.td_loss_uk
DEFRA UK EV charging (BEV, Supermini) — kgCO2e per km0.02522kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H29v2026.4ev_charging.car.segment.supermini.bev.charging_uk
DEFRA SECR EV energy use (BEV, Supermini) — kWh per km0.19157kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E26v2026.1ev_charging.car.segment.supermini.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Supermini) — kgCO2e per km0.00249kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H26v2026.1ev_charging.car.segment.supermini.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Supermini) — kgCO2e per km0.01791kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D29v2026.4ev_charging.car.segment.supermini.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Supermini) — kWh per km0.13599kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D26ev_charging.car.segment.supermini.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Supermini) — kgCO2e per km0.00178kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D26v2026.1ev_charging.car.segment.supermini.phev.td_loss_uk
DEFRA UK EV charging (BEV, Upper medium) — kgCO2e per km0.02853kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H33v2026.4ev_charging.car.segment.upper_medium.bev.charging_uk
DEFRA SECR EV energy use (BEV, Upper medium) — kWh per km0.21769kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E30v2026.1ev_charging.car.segment.upper_medium.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Upper medium) — kgCO2e per km0.00283kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H30v2026.1ev_charging.car.segment.upper_medium.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Upper medium) — kgCO2e per km0.00718kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D33v2026.4ev_charging.car.segment.upper_medium.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Upper medium) — kWh per km0.05393kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D30v2026.1ev_charging.car.segment.upper_medium.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Upper medium) — kgCO2e per km0.00071kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D30v2026.1ev_charging.car.segment.upper_medium.phev.td_loss_uk
DEFRA UK EV charging (BEV, Average car) — kgCO2e per km0.02686kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H55v2026.4ev_charging.car.size.average.bev.charging_uk
DEFRA SECR EV energy use (BEV, Average car) — kWh per km0.20358kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E52v2026.1ev_charging.car.size.average.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Average car) — kgCO2e per km0.00266kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H52v2026.1ev_charging.car.size.average.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Average car) — kgCO2e per km0.00873kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D55v2026.4ev_charging.car.size.average.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Average car) — kWh per km0.06558kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D52v2026.1ev_charging.car.size.average.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Average car) — kgCO2e per km0.00086kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D52v2026.1ev_charging.car.size.average.phev.td_loss_uk
DEFRA UK EV charging (BEV, Large car) — kgCO2e per km0.0279kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H53v2026.4ev_charging.car.size.large.bev.charging_uk
DEFRA SECR EV energy use (BEV, Large car) — kWh per km0.21119kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E50v2026.1ev_charging.car.size.large.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Large car) — kgCO2e per km0.00276kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H50v2026.1ev_charging.car.size.large.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Large car) — kgCO2e per km0.00944kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D53v2026.4ev_charging.car.size.large.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Large car) — kWh per km0.07084kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D50v2026.1ev_charging.car.size.large.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Large car) — kgCO2e per km0.00093kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D50v2026.1ev_charging.car.size.large.phev.td_loss_uk
DEFRA UK EV charging (BEV, Medium car) — kgCO2e per km0.02563kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H51v2026.4ev_charging.car.size.medium.bev.charging_uk
DEFRA SECR EV energy use (BEV, Medium car) — kWh per km0.19422kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E48v2026.1ev_charging.car.size.medium.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV, Medium car) — kgCO2e per km0.00254kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H48v2026.1ev_charging.car.size.medium.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Medium car) — kgCO2e per km0.00691kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D51v2026.4ev_charging.car.size.medium.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Medium car) — kWh per km0.05184kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D48v2026.1ev_charging.car.size.medium.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV, Medium car) — kgCO2e per km0.00069kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D48v2026.1ev_charging.car.size.medium.phev.td_loss_uk
DEFRA UK EV charging (BEV, Small car) — kgCO2e per km0.02469kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H49v2026.4ev_charging.car.size.small.bev.charging_uk
DEFRA SECR EV energy use (BEV, Small car) — kWh per km0.18744kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E46v2026.1ev_charging.car.size.small.bev.energy_use_secr
DEFRA UK EV charging (PHEV, Small car) — kgCO2e per km0.01791kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D49v2026.4ev_charging.car.size.small.phev.charging_uk
DEFRA SECR EV energy use (PHEV, Small car) — kWh per km0.13599kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D46ev_charging.car.size.small.phev.energy_use_secr
Ev Charging: Van — 17 factors
FactorValueUnitGasSourceLast changedCanonical key
DEFRA UK EV charging (BEV, Average (up to 3.5 tonnes)) — kgCO2e per km0.0426kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H71v2026.4ev_charging.van.average.bev.charging_uk
DEFRA SECR EV energy use (BEV van, Average (up to 3.5 tonnes)) — kWh per km0.32519kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E68v2026.1ev_charging.van.average.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV van, Average (up to 3.5 tonnes)) — kgCO2e per km0.00423kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H68v2026.1ev_charging.van.average.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Average (up to 3.5 tonnes)) — kgCO2e per km0.01095kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D71v2026.4ev_charging.van.average.phev.charging_uk
DEFRA SECR EV energy use (PHEV van, Average (up to 3.5 tonnes)) — kWh per km0.08333kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D68v2026.1ev_charging.van.average.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV van, Average (up to 3.5 tonnes)) — kgCO2e per km0.00109kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D68v2026.1ev_charging.van.average.phev.td_loss_uk
DEFRA UK EV charging (BEV, Class I (up to 1.305 tonnes)) — kgCO2e per km0.02683kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H62v2026.4ev_charging.van.class_i.bev.charging_uk
DEFRA SECR EV energy use (BEV van, Class I (up to 1.305 tonnes)) — kWh per km0.20446kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E59v2026.1ev_charging.van.class_i.bev.energy_use_secr
DEFRA UK EV charging (BEV, Class II (1.305 to 1.74 tonnes)) — kgCO2e per km0.03709kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H65v2026.4ev_charging.van.class_ii.bev.charging_uk
DEFRA SECR EV energy use (BEV van, Class II (1.305 to 1.74 tonnes)) — kWh per km0.28265kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E62v2026.1ev_charging.van.class_ii.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV van, Class II (1.305 to 1.74 tonnes)) — kgCO2e per km0.00368kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H62v2026.1ev_charging.van.class_ii.bev.td_loss_uk
DEFRA UK EV charging (BEV, Class III (1.74 to 3.5 tonnes)) — kgCO2e per km0.0453kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!H68v2026.4ev_charging.van.class_iii.bev.charging_uk
DEFRA SECR EV energy use (BEV van, Class III (1.74 to 3.5 tonnes)) — kWh per km0.34451kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!E65v2026.1ev_charging.van.class_iii.bev.energy_use_secr
DEFRA UK EV T&D loss (BEV van, Class III (1.74 to 3.5 tonnes)) — kgCO2e per km0.00448kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!H65v2026.1ev_charging.van.class_iii.bev.td_loss_uk
DEFRA UK EV charging (PHEV, Class III (1.74 to 3.5 tonnes)) — kgCO2e per km0.01095kg CO2e per kmCO₂eDEFRA_2026'UK electricity for EVs'!D68v2026.4ev_charging.van.class_iii.phev.charging_uk
DEFRA SECR EV energy use (PHEV van, Class III (1.74 to 3.5 tonnes)) — kWh per km0.08338kWh per kmDEFRA_2026'SECR kWh UK electricity for EVs'!D65v2026.1ev_charging.van.class_iii.phev.energy_use_secr
DEFRA UK EV T&D loss (PHEV van, Class III (1.74 to 3.5 tonnes)) — kgCO2e per km0.00109kg CO2e per kmCO₂eDEFRA_2026'UK electricity T&D for EVs'!D65v2026.1ev_charging.van.class_iii.phev.td_loss_uk

Last changed names the data-layer edition in which a factor last took a new value, reconstructed from every released edition since v2025.13. A dash means the value has not moved since tracking began — which is the answer to "is the figure I used last year still current?".

Common questions

89 factors. They are read live from the GreenCalculus data layer on every page build rather than re-typed, so the figures here are the same ones the calculators use. The upstream publisher is UK Government GHG Conversion Factors 2026.

Not without checking the unit first. This group spans 2 different units of measurement, the most common being kg CO2e per km. A factor is only meaningful against the activity data its unit describes, which is why the spread on this page is reported per unit and never blended into a single average.

87 of the 89 factors here have been revalued at least once since tracking began, most recently in v2026.4. The Last-changed column names the edition each one last moved in, and a dash means the value has not moved at all — which is the answer to “is the figure I used last year still current?”.

Every row has its own link. Click the canonical key in the last column and the address bar will hold an anchor for that one factor, so a citation resolves to the number itself rather than to a table someone has to search. Quote the data-layer edition alongside it (currently v2026.107) — values change between editions, and the version is what lets a reader resolve the exact figure you used.

Yes. This group is readable from an open endpoint with no key and no signup: https://greencalculus.com/wp-json/greencalculus/v1/factors/ev_charging. Responses carry an X-GC-Version header so a consumer can detect a new edition without diffing the payload. Cite the upstream publisher for the values themselves.

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