Carbon Footprint Calculator (CO₂e/GHG) for Small Businesses
Small Business CO₂e (GHG) Calculator
For teams of 1–25 people. Emissions simplified.
Quick · Practical · Free
Choose electricity number
World average ≈ 0.30 kg CO₂e per kWh.
This only changes electricity. UK and EU are lower because their power grids are cleaner. If unsure, leave “World average”.
1) Energy & Buildings
What is it? Power you used in a year. Where to find it? Your electricity bill (look for “kWh”). If you don’t know, put your best guess. If you don’t pay electricity, put 0.
Working from home? Use your home electricity bill, but count only the part for your business time. Example: if your home uses 4,000 kWh in a year and you work ~35% of your waking time on the business, count 4,000 × 0.35 = 1,400 kWh.
“District/shared heating” means heat supplied by your building or a city network. If your office doesn’t have this, put 0.
Natural gas used (kWh). If none, 0.
Oil delivered for a boiler (litres). If never, 0.
2) Transport & Travel
Fuel you bought for work vans or cars. If none, 0.
Diesel fuel for work vehicles. If none, 0.
Staff using their own car for business (reimbursed km). Sum for everyone.
Total train distance for work trips for the year.
Total bus or coach distance for work trips.
Uber or taxi distance for work trips.
Flights under ~3 hours (one way). Count people × trips.
Flights over ~3 hours (one way). Count people × trips.
3) Employee Commuting
Average daily km × days worked × people. If unsure, estimate.
Train, metro, or bus to and from work for all staff (km in one year).
Bike or walking to and from work (km). This is low/zero emissions.
4) Purchased Goods & Services
One pack of A4 paper ≈ 2.5 kg.
Boxes, mailers, bubble wrap, etc.
How many laptops you bought this year.
How many phones you bought this year.
Physical servers or big IT hardware.
Furniture, cleaning products, uniforms, printing, etc.
5) Waste, Water, Deliveries
Enter kilograms (from contractor or weight tickets).
Enter kilograms recycled.
From your water bill (m³). Estimate if needed.
Total kilograms of parcels you shipped this year.
Pick one reasonable average, e.g. 50 km.
Scope 1 (direct)
0 kg CO₂e
Scope 2 (energy)
0 kg CO₂e
Scope 3 (other)
0 kg CO₂e
Your estimated footprint: 0 kg CO₂e
Scope 1 = fuels you burn; Scope 2 = electricity or heat you buy; Scope 3 = everything else such as travel, purchases, deliveries, and waste.
Top 3 to Start
We pick the areas where you entered the most info. If tied, we show the bigger ones first.
Disclaimer
This calculator reports estimated greenhouse gas (GHG) emissions as CO₂e (carbon-dioxide equivalent). Electricity uses your selected region (World/UK/EU).
This is a good starting point. It shows where you stand and what to work on first. Update your numbers once a year.
Last updated: October 2025