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Your single-use plastic footprint
Enter what your household uses in a normal week. See how much plastic that is in a year, and the CO2 it took to make.
Your year
Enter your weekly items and press Calculate.
| Item | Per year | kg |
|---|
Your best swaps
Method and sources
Items per week times 52 times the weight of one item. CO2 is that weight times 3.17 kg CO2e per kg. Item weights vary a lot by brand and country, so treat results as a rough guide.
- UK DESNZ GHG Conversion Factors 2025, Average plastics, primary material production, 3,172 kg CO2e/tonne (via Climatiq)
- rePurpose Global, 500 ml PET bottle 18 g (conservative median)
- Plastic bag 10 g: assumption, inside the 7.5 to 12.6 g range for HDPE bags in a UK Environment Agency study.
- Ocean Conservancy, cup lid 4.5 g average
- Takeaway box 30 g and straw 0.5 g: assumptions, inside ranges used by public calculators (box 20 to 50 g, straw 0.4 to 1 g).
Questions
How much does a plastic water bottle weigh?
A 500 ml PET bottle weighs about 10 to 30 g depending on the brand. We use 18 g, the median used by rePurpose Global.
How much CO2 does making plastic emit?
About 3.17 kg CO2e per kg of new plastic. This is the UK government (DESNZ) 2025 factor for average plastics, primary production.
Does this include what happens after I throw it away?
No. We count making the plastic only. Landfill of rigid plastic adds very little CO2, but plastic litter harms land and sea in other ways.
What is the easiest swap in Qatar?
Water bottles, for most homes. A refillable bottle and a large dispenser bottle or tap filter cut the most items per week.
Get tips by email
Low-plastic swaps that work in the Gulf. Once a month.