# A4 coefficients

**URL:** <https://community.carbonleadershipforum.org/t/a4-coefficients/3497>\
**Category:** LCA Data & Tools\
**Created:** [May 25, 2021, 8:03pm UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497 "2021-05-25T20:03:41Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![jellowitz](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@jellowitz](https://community.carbonleadershipforum.org/u/jellowitz)\
**Post date:** [May 25, 2021, 8:03pm UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497/1 "2021-05-25T20:03:42Z")

</div>

I am aware that there are European-specific global warming potential (GWP) coefficients for life cycle module A4 - Transportation, but where can North American/US A4 coefficients be found?

Thanks everyone!  
Jonathan Ellowitz

---

<div class="post-metadata">

**Author:** ![ksimonen](https://sea1.discourse-cdn.com/flex015/user_avatar/community.carbonleadershipforum.org/ksimonen/32/97_2.png) [@ksimonen](https://community.carbonleadershipforum.org/u/ksimonen)\
**Post date:** [May 26, 2021, 5:41pm UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497/2 "2021-05-26T17:41:41Z")

</div>

Look to GREET [https://greet.es.anl.gov/](https://greet.es.anl.gov/) from Argon National Lab:  
The Greenhouse gases, Regulated Emissions, and Energy use in Technologies Model

---

<div class="post-metadata">

**Author:** ![anthony.pak](https://sea1.discourse-cdn.com/flex015/user_avatar/community.carbonleadershipforum.org/anthony.pak/32/3234_2.png) [@anthony.pak](https://community.carbonleadershipforum.org/u/anthony.pak)\
**Post date:** [May 26, 2021, 5:51pm UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497/3 "2021-05-26T17:51:19Z")

</div>

EcoTransIT World is a great tool to calculate transportation-related emissions for A4. Input the weight, origin, destination, and modes of transport, and it will show total distance and emissions. It seems to have a fairly robust methodology behind it. Hope this helps!

> **[EcoTransIT World - Emission Calculator](https://www.ecotransit.org/en/emissioncalculator/)**
>
> Emission calculator for greenhouse gases like carbon, exhaust emissions and energy demand for global freight transports.

Cheers,  
Anthony Pak

---

<div class="post-metadata">

**Author:** ![jellowitz](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@jellowitz](https://community.carbonleadershipforum.org/u/jellowitz)\
**Post date:** [May 27, 2021, 12:12am UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497/4 "2021-05-27T00:12:57Z")

</div>

Thanks Anthony! This is very helpful. What a great resource.

~Jonathan

---

<div class="post-metadata">

**Author:** ![jellowitz](https://avatars.discourse-cdn.com/v4/letter/j/858c86/32.png) [@jellowitz](https://community.carbonleadershipforum.org/u/jellowitz)\
**Post date:** [May 27, 2021, 12:13am UTC](https://community.carbonleadershipforum.org/t/a4-coefficients/3497/5 "2021-05-27T00:13:39Z")

</div>

Thank you so much Kate! This looks like a very valuable resource. There a lot to learn from this. Very grateful.