Calculating CO2e for a Tetra Pak Carton

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Certified model

This online calculator (Carton CO2 calculator version 5, 2018) has been certified by the Carbon Trust as capable of generating carbon footprints in compliance with PAS 2050:2011, ISO 14044:2006 and ISO/TS 14067:2013.

Scope of the Carton CO2 calculator

The results show the carbon footprint of the carton under European conditions up to the moment when the packaging material leaves our factories. An assessment across the full life cycle requires additional data that varies locally, and with each specific product. For example, distribution distances vary depending on where each package is filled and sold; some filled packages are stored chilled while others not; some packages will be recycled, others not.

Moulding of caps and tops in the filling machine is not included in the results. This is relevant for the Tetra Top and Tetra Evero Aseptic packages, and any direct injection moulding concept (DIMC) closures.

Straws are not included in the results. There is a wide portfolio of straws to choose from with different lengths and diameters, and it is not practically possible to include all the available options in the calculator. In addition, the straw has a limited carbon footprint when compared to the full package. As an example, the carbon footprint of a 0.5 g straw is approximately 1 g CO2e, based on the same scope and data as in the calculator.

Indicative results

The calculated results are not exact; they are indicative and based on a number of simplifications. To get the exact carbon footprint of a package you need to know its specific material composition, in which converting factory it was produced and whether raw materials were brought to Tetra Pak by train or truck. We have used the most common material specification for each package as the basis for the calculation of the results.

Package specifications and weights vary locally and with product protection requirements. carbon footprint data will necessarily change over time as methodologies and data are refined.

Use of the results

The results should not be used to support comparative assertions made to the public. Any such use would fall outside of the requirements of the relevant ISO standards.

Calculations

The calculations are based on industry average data and for European conditions. For production of liquid packaging board average data as presented by The Alliance for Beverage Cartons and the Environment (www.ace.be) is used, for plastics data as presented by Plastics Europe is used (www.plasticseurope.org) and for aluminium foil data as presented by European Aluminium Association is used (www.eaa.net). Data for production of bio-based PE is sourced from the LCA made available by Braskem (www.braskem.com.br).

For the converting operations and transport of raw materials to the converting factory, global average data from Tetra Pak's GHG reporting is used representing the performance in the last full reporting year. The impact of the transport of raw materials to the converting factory is included in the converting result.

Biogenic carbon

Growing plants capture and store carbon from the atmosphere. When the wood fibre is processed into paperboard (or sugarcane into bio-PE), the carbon continues to be stored in the carton. The ‘biogenic carbon uptake in the material’, as presented separately in the results, is an estimate of the amount of carbon that is stored in the carton when leaving the Tetra Pak converting factory gate. To get a net cradle to gate result, including both fossil and biogenic CO2, the carbon footprint impact (fossil CO2) and the biogenic carbon uptake in the material (which is a negative flow) should be summed.

Comments on this version

The results are based on version 5 of the calculator, published 2018-05-25.

The calculator is updated annually to ensure that the latest available emission factors and material specifications are applied.

The results of the calculator may not be directly comparable with those generated in earlier versions.