Environment
Carbon Footprint Calculator
Annual household carbon footprint from energy, travel, flights and diet.
footprint = Σ (activity × emission factor)
Also called co2 footprint calculator · household emissions
Energy & Environment · 9 calculators
Environment Calculators
Estimate carbon footprints from electricity, fuel and travel, water footprint, recycling and tree CO₂ absorption.
Environment
Electricity Carbon Calculator
CO₂ emissions from your electricity use, and how a greener tariff changes them.
kg CO₂ = kWh × g/kWh ÷ 1000
Also called electricity co2 calculator · grid emissions calculator
Environment
Fuel CO2 Calculator
CO₂ emitted by burning petrol, diesel, gas or heating oil, per litre and per journey.
kg CO₂ = litres × emission factor
Also called petrol co2 calculator · diesel emissions
Environment
Travel Emissions Calculator
CO₂ from a journey by car, train, bus, ferry or plane, per person.
kg CO₂ = distance × emission factor ÷ pas…
Also called flight emissions calculator · journey co2
Environment
Water Footprint Calculator
Total water footprint including the hidden water embedded in food and goods.
footprint = direct use + food water + goo…
Also called virtual water calculator · hidden water usage
Environment
Paper Savings Calculator
Trees, water and CO₂ saved by reducing paper use or going digital.
saved sheets = daily use × reduction × wo…
Also called paperless savings · trees saved calculator
Environment
Energy Savings Calculator
Savings from an efficiency upgrade, with payback period and lifetime return.
saving = current use × reduction % × rate
Also called efficiency savings calculator · energy upgrade payback
Environment
Recycling Impact Calculator
Energy and CO₂ saved by recycling paper, glass, plastic, aluminium and steel.
CO₂ saved = Σ (kg recycled × saving facto…
Also called recycling savings calculator · recycling co2 saved
Environment
Tree CO2 Absorption Calculator
How much CO₂ trees absorb over time, and how many you need to offset a footprint.
trees = annual CO₂ ÷ absorption per tree …
Also called trees to offset carbon · tree carbon sequestration
Key environment formulas
| Carbon Footprint | footprint = Σ (activity × emission factor) |
|---|---|
| Electricity Carbon | kg CO₂ = kWh × g/kWh ÷ 1000 |
| Fuel CO2 | kg CO₂ = litres × emission factor |
| Travel Emissions | kg CO₂ = distance × emission factor ÷ passengers |
| Water Footprint | footprint = direct use + food water + goods water |
| Paper Savings | saved sheets = daily use × reduction × working days |
| Energy Savings | saving = current use × reduction % × rate |
| Recycling Impact | CO₂ saved = Σ (kg recycled × saving factor for that material) |
| Tree CO2 Absorption | trees = annual CO₂ ÷ absorption per tree per year |