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Carbon Footprint Estimator

Estimate your household's annual CO₂e and get the three highest-impact changes you can make.

Understanding your household carbon footprint

The average UK individual produces around 4.7 tonnes of CO₂-equivalent (CO₂e) per year, though this varies significantly by lifestyle, location, and income. Your household total is the sum of emissions from energy use, transport, food, goods and services, and waste.

What CO₂e means

CO₂e — carbon dioxide equivalent — is the standard unit for measuring greenhouse gas emissions. It converts all gases (CO₂, methane, nitrous oxide) into their equivalent warming impact over 100 years. Methane from livestock, for example, is roughly 25× more potent than CO₂, so one tonne of methane equals 25 tonnes CO₂e.

The biggest contributors to a UK footprint

Based on data from the Committee on Climate Change and DEFRA, the largest contributors for a typical UK household are:

  • Transport — flights and driving together account for roughly 30% of a typical footprint. A single transatlantic return flight adds approximately 1.7 tonnes CO₂e per passenger.
  • Home energy — heating and electricity represent 25–30% for an average home. Heat pumps and renewable electricity tariffs are the largest single systemic levers available to households.
  • Food — beef, lamb, and dairy are the main drivers. Red meat has 10–50× the carbon footprint of plant-based equivalents.
  • Consumer goods — clothing, electronics, and household goods carry embedded carbon from production and shipping.

The UK’s net-zero target

The UK committed to reaching net-zero by 2050 under the Climate Change Act. Meeting this requires household per-person emissions to fall from roughly 4.7 tonnes to 1.5–2 tonnes — more than a 65% reduction. This requires both individual behaviour change and systemic policy change.

What you can do today

The changes with the highest impact, ranked by approximate UK savings:

  1. Switch to a green energy tariff (~1.5 tonnes/yr)
  2. Avoid one long-haul return flight (~1.7 tonnes/trip)
  3. Reduce red meat to once a week (~0.5 tonnes/yr)
  4. Switch to an electric vehicle or reduce driving (~0.7–2.3 tonnes/yr)
  5. Buy second-hand clothing instead of new (~0.1–0.3 tonnes/yr)

Related tools: Pet Carbon Footprint · Eco Swap · Shopping Scorecard