Singapore Emission Factors

18 emission factors for Singapore, gathered from 6 parts of the GreenCalculus MasterBrain — Reporting Thresholds (13), Carbon Pricing (1), Digital (1), Grid Lifecycle Intensity (1), Hotel Stay (1) and Transmission & Distribution (1) — so figures normally spread across separate reference pages sit on one. Drawn from 6 named sources, each listed with its publisher and licence under Sources below, and read live from the data layer on every page build. They span 16 units of measurement, which is why the spread below is reported per unit and never blended.

The Scope 2 factor Singapore does not have

The distinction decides whether a number belongs on a Scope 2 line. A GHG Protocol Scope 2 figure takes a location-based factor — direct combustion at the generator, for the grid the site draws from. What this page carries for Singapore is grid.sgp.electricity.lifecycle_intensity: 0.49709 kg CO₂e per kWh, Ember Yearly Electricity Data, data year 2024. That is a full life-cycle metric — generation plus plant construction, fuel supply chains and upstream methane — recorded against scope.ghg_protocol = outside_scopes because it makes no GHG Protocol scope assertion at all.

It suits screening, context and product-level work. It does not suit the Scope 2 line of a corporate inventory, and an assurance provider should be expected to say so. For that line, use a location-based factor from the national authority or the figure your electricity retailer discloses.

The absence is a statement about this corpus, not about the world. It records that no national direct factor for Singapore has been sourced, licensed and cell-referenced to the standard every other row here meets — not that none is published anywhere. The API answers the same way rather than guessing, which is the whole point of asking it:

curl "https://greencalculus.com/wp-json/greencalculus/v1/factors?key_prefix=grid.sgp"

returns exactly one row — the lifecycle intensity above, carrying its boundary statement. Ask for the Scope 2 key instead:

curl "https://greencalculus.com/wp-json/greencalculus/v1/factors?key_prefix=grid.sgp.electricity.location_based"

and the response is "total": 0 with a warning naming the key that does not exist. No silent fallback to a neighbouring country, no regional average standing in for a national figure, no invented number. That is the behaviour to want from anything feeding a disclosure — and the reason to call a data layer rather than ask a model.

Where these factors also appear

Each factor here also appears on the reference page for its own family — Grid Electricity Carbon-Intensity Factors by Country, Regulatory Reporting Thresholds, Carbon Price Reference Values, Grid Transmission & Distribution Loss Factors, Hotel Stay Emission Factors and Digital & Cloud Emission Factors — where it sits alongside every other country. This page is the same data cut to one country, for when that is the question being asked.

Who has to report, and from when

Thirteen of the rows below are not emission factors at all — they are the parameters of Singapore’s ISSB-aligned climate reporting mandate, administered by SGX RegCo and ACRA: which entities are captured, the first financial year each track reports for, the SGD revenue and total-asset thresholds that bring a large non-listed company into scope, the Scope 3 and comparatives reliefs, the external assurance phase-in and the scenario-analysis expectation. They are carried in the same corpus, under the same citation discipline, because the question “which factor do I use?” is usually preceded by “am I in scope, and for which year?”

What this group contains

Figures are computed per unit and never blended: a median across different units would be arithmetically valid and physically meaningless. 7 further units in this group have fewer than 3 factors and are counted above but not described.

What has changed

Sources, citation & machine access

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). Singapore Emission Factors (MasterBrain v2026.203). GreenCalculus. https://greencalculus.com/factors/singapore-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, in BibTeX then RIS:

@misc{greencalculus__2026,
  author       = {Say, Jeremiah},
  title        = {Singapore Emission Factors},
  year         = {2026},
  howpublished = {GreenCalculus},
  note         = {MasterBrain v2026.203},
  url          = {https://greencalculus.com/factors/singapore-emission-factors/}
}

TY  - DATA
AU  - Say, Jeremiah
TI  - Singapore Emission Factors
PY  - 2026
PB  - GreenCalculus
ET  - MasterBrain v2026.203
UR  - https://greencalculus.com/factors/singapore-emission-factors/
ER  - 

The open API is browsed by section, not by country, so no single address returns exactly this page. Its 18 factors sit in 6 sections of the API, each of which also returns other countries. No key, no signup:

https://greencalculus.com/wp-json/greencalculus/v1/factors/<section>

Sections holding a factor for this country: regulatory_thresholds, carbon_pricing, digital, grid_lifecycle, hotel_stay, transmission_distribution.

For the rows on this page and no others, take the spreadsheet - every factor's source, the edition it last changed in, and its own link:

https://greencalculus.com/wp-json/greencalculus/v1/factors-export?page=singapore-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

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