Your footprint is shown in tCO₂/year. It is an estimated, approximate annual carbon dioxide figure linked to your lifestyle.

The model starts from country-level per-person CO₂ data for the country you select, then adjusts major lifestyle areas based on your answers.

Treat the number as directional guidance for understanding where your footprint may be higher or lower — not as certified emissions accounting.

This calculator currently uses CO₂-based country data. CO₂e includes other greenhouse gases such as methane and nitrous oxide, which are especially important for food and agriculture.

Because the current model is CO₂-based, we label results as tCO₂ instead of CO₂e.

We may upgrade the model to fuller CO₂e data in the future.

Your answers adjust these lifestyle areas. Some categories use defaults when answers are missing — that is why the confidence level on your result matters.

• Home energy

  Housing type, heating, efficiency, climate control, household size, and whether you use renewable electricity or a green plan.

• Ground transport

  Car use, public transport, cycling, and walking, plus car type when relevant.

• Flights

  Short- and long-haul flight frequency, kept separate from ground transport. If you answer that you take no flights, the flight category is zero.

• Food & diet

  Red meat, poultry and fish, dairy, and related food-waste habits.

• Consumption

  How often you buy new clothing, electronics, and home goods, and second-hand habits.

• Waste

  Self-reported waste and recycling habits.

The model begins with an average per-person CO₂ footprint for your selected country.

Your answers then scale each category up or down from that starting point.

The same lifestyle can score differently in different countries because electricity systems, transport patterns, and average consumption differ.

When country electricity data is available, we adjust how much renewable or green electricity lowers your home score.

In countries with carbon-intensive grids, choosing renewable electricity has a larger estimated effect. In countries with cleaner grids, the effect is smaller.

If renewable status is unknown, we use a conservative in-between adjustment. If country grid data is missing, we fall back to standard quiz multipliers.

Confidence tells you how much of the result is based on your answers versus defaults.

• High confidence

  Most important quick and refinement answers were provided, with few categories relying on defaults.

• Medium confidence

  Many answers were provided, but some categories still use typical defaults.

• Low confidence

  Several answers were missing, so the result is rougher and more indicative than precise.

For a more accurate estimate, complete refinement questions or retake the quiz with fuller answers.

Recommendations focus on your largest footprint areas and gaps suggested by your answers.

We avoid recommending actions you already appear to be doing well.

Potential reductions are estimates, not guarantees.

Multiple actions can overlap. If several actions affect the same source, we cap the combined reduction so the plan does not claim more savings than that source can explain.

Selected reduction totals and recommended potential use the same capped calculation.

This calculator does not replace a detailed carbon audit.

• It uses broad lifestyle categories, not exact utility bills, receipts, or product-level data.
• It does not currently calculate full CO₂e (methane, nitrous oxide, and other gases beyond CO₂).
• It relies on country-level averages and simplified multipliers.
• Some effects are hard to estimate precisely, such as supply chains and exact product footprints.
• Use results as a guide for decisions, not as certified emissions reporting.