Societypublished as isOutside the levels infrastructureInfrastructure, outside the levelsInfrastructure18 entriesFigures published by others, reproduced as they are; they cut across the territories without adding to them.Database structure 
6Territories
5Organisations
4Occupations and activities
3Uses
2Machine operations
1Calculation factorsMicrosoft, fiscal year
All the electricity consumed by Microsoft over a fiscal year, from July to June, data centres and offices, with the carbon and water published.
- Selected reference: Fiscal year 2025, from July 2024 to June 2025, source Microsoft.
- Consumption includes uses other than AI; AI's share is not isolated in this figure.
- Out of scope: the company's other emissions, including server manufacturing, counted separately.
Sentence to citeMicrosoft, annual fiscal year: 12 MtCO2e, figure published by Microsoft, for 37 TWh of electricity.
Origin of the value
Multiplied by more than 3 in 5 fiscal years.
Comparison with other infrastructure entries
Characteristics
| Unit | 1 year : fiscal year 2025, from July 2024 to June 2025 |
|---|---|
| Location | not applicable: a published total does not depend on the location of the servers |
| Counted | the electricity of all Microsoft sites, and its carbon based on the local grid |
| Not counted | the company's other emissions, including server manufacturing, counted separately |
| Status | published, 2 readings of the same scope |
All the characteristics
| Identifier | IA-0106, projetcelsius.com/en/ai/database/IA-0106/ |
|---|---|
| Version | 0.3 of 2 November 2026 |
| Category | Infrastructure, published as is |
| Year | Fiscal year 2020, from July 2019 to June 2020 (10.8 TWh), Fiscal year 2023, from July 2022 to June 2023 (23.6 TWh), Fiscal year 2024, from July 2023 to June 2024 (29.8 TWh), Fiscal year 2025, from July 2024 to June 2025 (12 MtCO2e) |
| Choice of the selected value | value taken as it stands from its source, without calculation |
| Sources | Microsoft, 2026 |
| Compared with | Chip manufacturing (984 GWh), Data centres, Ireland (7.66 TWh), Meta (18.4 TWh), Google (43.6 TWh), Digital sector in France (reference) (51.5 TWh) |
| Licence | CC BY 4.0 |
Result for the chosen case
Sources of the calculation
1 publication, for this entry and those used to calculate it, with the chosen parameters.
Energy and factors
The references of the selected values and of the entries used in this calculation.
Microsoft · July 2026
2026 Environmental Sustainability Report, Data Fact Sheet ↗ (new tab)
Role and limits : Microsoft
What the publication covers. electricity, emissions by scope, water withdrawal and consumption, fiscal years 2020 to 2025
What it does not cover. AI's share, not published separately
Reading by the database. The company's published annual data; data centre water is estimated by a model
Reference for the variant "Fiscal year 2025, from July 2024 to June 2025"
Scope of the figure used. Microsoft, world, fiscal year from July 2024 to June 2025, electricity consumed by the company, data centres and buildings; series of fiscal years 2020 to 2025
Limit. Fiscal years from July to June, not calendar years
Published values
6 figures for the same quantity, each in its own scope.
Electricity
| Source | Date | Electricity | What the figure measures | Scope | Status |
|---|---|---|---|---|---|
| Microsoftselected by the database, v0.3 | 2026 | 37 TWh | the value selected by the database | same scope | published |
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 37 TWh | Microsoft, world, fiscal year from July 2024 to June 2025, electricity consumed by the company, data centres and buildings; series of fiscal years 2020 to 2025 | same scope | measured |
CO2e
| Source | Date | CO2e | What the figure measures | Scope | Status |
|---|---|---|---|---|---|
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 12 MtCO2e | Microsoft, fiscal year 2025, emissions from purchased electricity based on the local grid (scope 2, location-based) | same scope | computation |
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 2.71 MtCO2e | Microsoft, fiscal year 2025, same electricity, based on its purchase contracts (scope 2, market-based) | other scope | computation |
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 21.1 MtCO2e | Microsoft, fiscal year 2025, all reported emissions (scopes 1, 2 contract-based and 3), according to the GHG Protocol | other scope | published |
Water
| Source | Date | Water | What the figure measures | Scope | Status |
|---|---|---|---|---|---|
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 8,170 Mm³ | Microsoft, world, fiscal year 2025, water consumed by owned and leased sites | same scope | estimated |
| Microsoft ↗2026 Environmental Sustainability Report, Data Fact Sheet | Jul. 2026 | 13,300 Mm³ | Microsoft, world, fiscal year 2025, water withdrawn by owned and leased sites | other scope | estimated |
The published figures do not all count the same scope; the scope of each figure is written next to it. Why do the estimates diverge?
Methodology conventions
With their alternatives
| The rule | a published total is reproduced as is, with its year and scope; it is not converted with an average factor and does not add to the database's calculations |
|---|---|
| Calculate a case without an entry | The formula, the default values and a step-by-step example |
Uses in the hub
Charts, figures, analyses and articles that cite this entry
History
Entry in version 0.3 of 2 November 2026, in the database in version 0.4
- 2 November 2026Designation : Microsoft, in one year becomes Microsoft, annual fiscal year.More precise designation: the object first, the specification after the comma, the quantity or period at the end; the former title remains searchable.
- 1st November 2026Creation : version 0.1.Entry added: Microsoft in one year, electricity for fiscal years 2020 to 2025, carbon and water published.
- 31 October 2026Creation of the database, in its first version (0.1).
