kilowatt hour CO2e equivalent (kWh→CO2e)
1 kilowatt hour CO2e equivalent = 0.445 kilograms CO2e
What is kilowatt hour CO2e equivalent?
Kilowatt hour CO2 equivalent is a carbon emissions unit expressing the greenhouse gases produced per kilowatt hour of energy. It is widely used by electricity providers, EV charging calculators, and corporate sustainability reporting.
Notes: Approximate grid factor
Real-world uses
kWh CO2e equivalent is the most commonly used unit for estimating household and commercial electricity carbon footprints. Energy auditors multiply monthly kWh consumption by the local grid emission factor (see this page's stated assumption for the global-average figure used here) to estimate carbon impact.
History
The kWh-to-CO2e conversion became a cornerstone of corporate carbon accounting with the GHG Protocol Scope 2 Guidance, published in 2015. National grid emission factors are updated annually by agencies like the US EPA (eGRID) and the UK DEFRA.
Common mistakes
Using an outdated or wrong regional emission factor. Grid carbon intensity changes yearly as the energy mix shifts. A 2015 emission factor may significantly overstate emissions in a region that has since added substantial renewable capacity.
When is this conversion used?
Converting kilowatt hour CO2e equivalent to kilogram CO2e is useful in the carbon emissions domain when comparing values across different measurement standards or applying formulas that require a specific unit.
How to convert kilowatt hour CO2e equivalent to kilogram CO2e
To convert kilowatt hour CO2e equivalent to kilogram CO2e, multiply the value by 0.445.
Conversion formula (from base unit)
x * 0.445
Measurement standards
The Greenhouse Gas Protocol, maintained jointly by the World Resources Institute and the World Business Council for Sustainable Development, is the de facto global standard for measuring and reporting greenhouse gas emissions across corporate, project, and product life-cycle scopes.
Did you know?
A single transatlantic round-trip flight from London to New York generates roughly 1.6 tonnes of CO₂ per passenger — nearly a quarter of the average annual carbon footprint of a person in France.
| kilowatt hours CO2e equivalent | kilograms CO2e |
|---|---|
| 0.1 | 0.0445 |
| 0.5 | 0.2225 |
| 1 | 0.445 |
| 2 | 0.89 |
| 5 | 2.225 |
| 10 | 4.45 |
| 25 | 11.125 |
| 50 | 22.25 |
| 100 | 44.5 |
| 250 | 111.25 |
| 500 | 222.5 |
| 1,000 | 445 |
Full kilowatt hour CO2e equivalent conversion table
| Unit | Value | Factor |
|---|---|---|
| kilogram CO2e | 1 kWh→CO2e = 0.445 kg CO2e | × 0.445 |
| gram CO2e | 1 kWh→CO2e = 445 g CO2e | × 445 |
| tonne CO2e | 1 kWh→CO2e = 0.000445 t CO2e | × 0.000445 |
| watt hour CO2e equivalent | 1 kWh→CO2e = 1,000 Wh→CO2e | × 1,000 |
| megawatt hour CO2e equivalent | 1 kWh→CO2e = 0.001 MWh→CO2e | × 0.001 |