Footprint calculator

The result combines annual estimates for food, car travel, flights, home energy and shopping. Diet and consumption levels use fixed averages. Car travel uses weekly kilometres multiplied over a year. The model does not automatically know your country, household composition, heating fuel, vehicle efficiency or exact food purchases.

This means the same answers produce the same result wherever you live. That is useful for a simple scenario comparison, but it limits accuracy. Public services, infrastructure and other indirect emissions are not comprehensively included. The total should not be compared directly with national footprints that use different accounting boundaries.

The plant-based scenario changes only the model’s food category and keeps your travel, home and shopping inputs unchanged. A high-meat starting point therefore produces a larger estimated reduction than an already low-meat diet. Someone already selecting vegan should see no additional diet saving under this comparison.

These annual food values use published-average-inspired categories, not a detailed assessment of your actual menu. They are separate from the relative UK diet charts elsewhere on the site. Portion sizes, production methods and waste can change real-world results, and the calculator does not measure those differences individually.

Weekly car kilometres should reflect your typical travel rather than an unusually busy or quiet week. The calculation assumes that pattern continues across the year. It does not distinguish electric and combustion vehicles, passenger occupancy or different fuel efficiencies. Those details matter in a more complete transport assessment.

The short-flight category uses a fixed allowance per entered flight, while long-haul travel is labelled as return trips. Real aviation emissions vary with route, cabin and accounting methods, including treatment of non-carbon warming effects. Use the values for exploration, and seek a route-specific method when planning a particular journey.

Low, average and high are broad levels rather than measurements from bills or receipts. They help show the importance of consumption but cannot capture insulation, household size or the emissions embodied in a specific purchase. A home-energy audit would require actual energy quantities and appropriate local emissions factors.

Shopping impacts include complex supply chains and product lifetimes. Repairing an item instead of replacing it may reduce demand, but the calculator does not quantify that individual decision. Use the category as a prompt to examine spending patterns, durable goods and avoidable purchases rather than as a precise judgement of your lifestyle.

A result is most useful when it leads to a specific next step. If food is a large category, try familiar plant-based meals. If travel dominates, examine the longest journeys. If home energy is prominent, investigate heating and efficiency. Start with changes that are meaningful and feasible in your circumstances.

Record your assumptions outside the calculator if you want to compare over time. A smaller number caused only by selecting a different category does not prove actual emissions changed. Real progress comes from changed habits, purchases or infrastructure. Combine personal action with opportunities to support better options in your community.