AECB Embodied Carbon Calculator – stand-alone version (and first year’s subscription)

£150.00 +VAT

The AECB CO2 Calc

Purchase includes free training manual, instructional videos and first years annual license fee.

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TDUK members get 15% discount using a coupon code

PHribbon © 2020 Tim Martel


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The AECB Embodied Carbon Calculator calculates Whole Life Carbon, that is Embodied CO2 from Cradle to Grave.  It’s written by Tim Martel who has worked as a Certified Passivhaus Designer for 10 years, formerly a Chartered Architectural Technologist, a course tutor for the AECB CarbonLite™ Retrofit Foundation course, and AECB software R&D lead and developer.

This stand-alone calculator does not need PHPP to operate.

The AECB CO2 Calc covers the whole life stages A-C (and D where information is available).

This therefore includes :

Stage A, A1-A3 Manufacture including A4 Transport to site and A5 Construction
Stage B, Use of the building including B4 Replacement
Stage C, Demolition and Disposal of the building
And quoted separately Stage D, Reuse, Recycling potential (outside the usual scope of the main calculation). It calculates the credit from reuse of an element, assembled part such as a frame, or something that is reused offsite.

The Embodied Carbon Calculator is also suitable for initial estimates for the RIBA 2030 Challenge v2 and LETI (London Energy Transformation Initiative).

Input Data

  • built-in library of 291 entries from EPDs containing the Full Life info for stages A-D and a further 140 from ICE 2019 with manufacturing data (A1-A3)
  • includes CO2 stored in timber and timber based materials, also called sequestered CO2. This is calculated where it has been omitted in the EPD.
  • standard RICS methodology including 60 year Reference Study Period
  • filters EPDs, choose whether you want to see products manufactured within your country, a region e.g. Europe, or all the EPDs
  • density, this is given by the software, but you can change it where units are “kg” in the final output sheet, for example if you know the installed density of cellulose or blown mineral wool



  • coloured results, the output table is coloured by value to make it easy to see where the CO2 is coming from
  • fully transparent calculation
  • up to 4 options can be graphed/compared
  • simpler format and option to simplify further so only the names of the materials and results are shown
  • Scope Summary written below the calculation for you to keep a record of exactly what is included
  • RIBA results gives RIBA 2030 Challenge results
  • LETI results graphic and detailed tables, all laid out on printable pages


Minimum System Requirements. You will need:

  • a Windows (PC) computer. If you have a Mac you will need to run a PC emulator (it works with Parallels, VMware fusion 11 with the PC version of Excel installed)
  • Microsoft Office 2019 or later

Upon purchase an e-mail which will be sent to you (within 2 working days) containing instructions on how to verify your sale, obtain a licence key for use and access the CO2 Calc.

Buying the package with an annual subscription fee

The AECB Embodied Carbon Calculator will be continually updated to allow for developments in PHPP, building regulations and other standards.  To allow us to keep your copy of the AECB CO2 Calc updated we will charge an annual recurring subscription to fund these developments.  The subscription will enable you to automatically receive all upgrades and fixes as they are released.

The first year’s subscription fee is included in the purchase price.

Upon the anniversary of your product purchase you will receive a request/invoice to pay the yearly subscription fee.

The AECB members price is £25 per annum and non-members will be charged £35 per annum.


Discounts are available for bulk purchases (more than 4) please email for further information.

Discounts are also available for educational institutions – please email for details.

TDUK members please use your coupon code at the checkout.

These discounts cannot be combined with the AECB membership discounted price.

Leaf,plant,logo,ecology,people,wellness,green,leaves,nature Symbol Icon Set Of Vector Designs Royalty Free Cliparts, Vectors, And Stock Illustration. Image 93805495. CO2 Calc calculations have been published in Passivhaus+ magazine

Leaf,plant,logo,ecology,people,wellness,green,leaves,nature Symbol Icon Set Of Vector Designs Royalty Free Cliparts, Vectors, And Stock Illustration. Image 93805495.Results from the CO2 Calc tool matched (within the error margins) a 2-3 day calculation from Mark Siddall (Architectural Technologist, Trainer for the CarbonLite Passivhaus Designer course and Principal at LEAP).  When it gave the same answer in about half an hour he said “I’ll definitely be using it next time”.

Embodied Carbon - Hambleside Danelaw