Klimatkalkylatorn version 2.0

This report describes the methodology for 'Klimatkalkylatorn version 2.0', a climate footprint calculator for the Swedish public. It details how emissions are calculated across housing, food, transport, and general consumption using 2019 data and GWP 100 values. The tool incorporates public sector impacts (3.7 tonnes CO2e/person) and compares individual results to national (9 tonnes), global (6.5 tonnes), and target (4 tonnes) benchmarks.

• The Klimatkalkylatorn tool calculates a user's climate footprint by summing CO2 equivalents (CO2e) across four categories: 'Bostaden' (housing), 'Biffen' (food), 'Bilen' (transport), and 'Butiken' (shopping/activities).
• The calculator uses Global Warming Potential (GWP) over 100 years to convert greenhouse gases into CO2 equivalents, specifically assigning a value of 1 to carbon dioxide, 28 to methane, and 273 to nitrous oxide.
• Housing emissions are estimated based on dwelling type, age, heated floor area, and energy source. For users who do not know their electricity consumption, the tool assumes an average of 5,747 kWh for houses and 4,200 kWh for holiday homes; apartment consumption is estimated at 50% of the house average (2,874 kWh).
• Food consumption impact is calculated based on weekly spending and the user's diet. Compared to a standard mixed diet (index 100), the tool applies reductions for flexitarian (-20%), vegetarian (-40%), WWF One Planet Plate (-55%), and vegan (-70%) diets, and an increase for meat-heavy diets (+30%).
• To avoid penalizing users for the higher cost of organic food, the tool applies a reduction to the calculated impact based on the proportion of organic purchases. This is based on 2019 data from PRO indicating organic foods were on average 18% more expensive than conventional ones.
• Transport emissions include both direct fuel emissions and indirect emissions from vehicle production and maintenance. Flight impacts are estimated using six geographical zones with round-trip distances ranging from 1,300 km (within Sweden) to 35,000 km (Zone 6, including Antarctica and Australia).
• The tool includes a fixed value for 'Public sector and investments' to account for shared infrastructure and public services. In 2019, this was 3.7 tonnes of CO2e per person, representing approximately 40% of Sweden's total consumption-based climate impact.
• The tool compares individual results against a 2019 average for Sweden (9 tonnes CO2e per person), a 2019 global average (6.5 tonnes CO2e per person), and a 2030 target of 4 tonnes CO2e per person set by WWF.
• Consumption of secondhand clothes and furniture is assumed to contribute zero emissions in the calculator to encourage reuse, despite the existence of limited impacts from logistics and premises.

APA

Axelsson, K., Grah, R., & Gong, J. (2022). Klimatkalkylatorn version 2.0. Stockholm Environment Institute. https://www.sei.org/wp-content/uploads/2022/12/klimatkalkylatornversion2-sei2022.054corr.pdf

Chicago

Axelsson, Katarina, Rok Grah, and Jindan Gong. Klimatkalkylatorn version 2.0. Stockholm Environment Institute, 2022. https://www.sei.org/wp-content/uploads/2022/12/klimatkalkylatornversion2-sei2022.054corr.pdf.

Wikipedia

{{cite report |last1=Axelsson |first1=Katarina |last2=Grah |first2=Rok |last3=Gong |first3=Jindan |title=Klimatkalkylatorn version 2.0 |publisher=Stockholm Environment Institute |date=December 2022 |url=https://www.sei.org/wp-content/uploads/2022/12/klimatkalkylatornversion2-sei2022.054corr.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{axelsson2022klimatkalkylatorn, author = {Axelsson, Katarina and Grah, Rok and Gong, Jindan}, title = {{Klimatkalkylatorn version 2.0}}, institution = {Stockholm Environment Institute}, year = {2022}, month = dec, url = {https://www.sei.org/wp-content/uploads/2022/12/klimatkalkylatornversion2-sei2022.054corr.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }