EC3 Tool
Building Transparency’s free, open-access tool and EPD database for comparing embodied carbon during material specification, procurement and project accounting.
Open the EC3 Tool ↗The short story
More than
a name.
EC3 launched publicly in 2019 and is managed by Building Transparency. The organisation’s 2026 methods account explains how differing EPD structures require ingestion, validation and alignment before meaningful comparison.
Why it is here
A useful starting point,
not a verdict.
It brings third-party Environmental Product Declaration data into material decisions while retaining the need to align units, modules, categories and project context.
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The researched view
Then, now and
what can be verified next.
This section follows the named sources. If a future direction is not published by the source, it is not added here.
Publicly launched in 2019
Building Transparency records that EC3 launched publicly in 2019 through the Carbon Leadership Forum and more than fifty partners. Building Transparency was formed in 2020 to manage and scale it.
A free tool joining quantities with third-party EPD data
EC3 supports material comparison and potential or realised project embodied-carbon accounting. Its February 2026 data account explains how EPD formats and indicator definitions can differ.
EC3 2.0 is inviting feedback on data operations
Building Transparency’s 2026 publication explicitly invites feedback on improvements for EC3 2.0. The documented direction is better ingestion and alignment, not a claim that all EPDs are already interchangeable.
Compare within a disciplined boundary
Align product category, function, unit, life-cycle modules, geography and dates; retain the original EPD and include durability and project performance.
Questions worth carrying
Take these to
the source.
- 01
Open the official source and confirm that its current scope matches what you need.
- 02
Check dates, location, eligibility, price, availability and terms before relying on the listing.
- 03
Independently verify any provider, product, claim or transaction connected with the resource.
Before you act
Use the listing
with context.
These checks are adapted to this kind of entry. The official source remains the place to confirm current details.
- 01
Open the official source and confirm that its current scope matches what you need.
- 02
Check dates, location, eligibility, price, availability and terms before relying on the listing.
- 03
Independently verify any provider, product, claim or transaction connected with the resource.
Controlling source
Continue with
the official record.
Pass the intriguing part forward—then let the sourced profile do the explaining.
A lower number is meaningful only after the product function, unit, modules and EPD method line up.
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