Free tool
Work out your company's direct emissions and the emissions from the electricity, heat or steam it buys, in tonnes of CO₂e. Each figure shows the factor behind it and, for a published factor, who published it, which year and under which licence. Nothing you type leaves your browser.
Have to hand: a year of fuel and electricity bills, your vehicles' fuel or mileage, and any refrigerant your engineer topped up.
Each publisher's latest edition is used whatever year you report; the edition is named on every row.
Fuel, vehicle and refrigerant factors outside the US are the UK DESNZ set, labelled on every row.
The emissions from burning a litre of diesel or a cubic metre of gas depend mainly on the fuel itself, so one published set is used and named; UK factors reflect UK fuel blends, which can differ a little from yours. Distance factors describe an average UK car or van of that size.
Boilers, furnaces, ovens and generators you own or control.
From your fuel bills or meter readings for the year.
Cars, vans and trucks your company owns or controls.
From fuel cards and receipts, or your mileage log. Staff's own cars and short-term rental cars used for business trips are not company vehicles; they belong in Scope 3 and are not counted here. Cars your company leases and runs usually count here too.
litres
Refrigerant lost from air conditioning or refrigeration, often the amount topped up in the year.
Your air-conditioning or refrigeration engineer's service record shows how much was topped up.
Older refrigerants such as R-22 are not counted in Scope 1 under the GHG Protocol; they may be reported separately. (Corporate Standard, chapter 4.)
Electricity from the grid used in your own buildings and equipment.
From your electricity bills for the year. If you have solar panels, enter only what you took from the grid.
District heat or steam delivered to you.
From your heat or steam supplier's bills.
Add what your company used in the year to see its emissions.
Scope 1 is the greenhouse gas your company releases itself: fuel burned in equipment it owns or controls, its own vehicles, and leaks such as refrigerant. Scope 2 is the emissions from making the electricity, heat or steam it buys. (GHG Protocol Corporate Standard, chapter 4.)
Each row is the amount you used times a published emission factor, which gives kilograms of CO₂e; the page adds them up and shows tonnes.
Where you can choose your electricity supplier or tariff (as in the EU, UK and US), the GHG Protocol asks for two Scope 2 figures. The location-based method uses the average factor of the grid where the electricity is used. The market-based method uses the factor from the electricity you chose to buy, such as a renewable tariff from your supplier. This calculator gives the location-based figure. (Scope 2 Guidance, 4.1 and 7.1.)
Losses on the grid before the electricity reaches you are not in your Scope 2; you can report them in Scope 3. (Corporate Standard, chapter 4.)
The factors are the published sets named on each row. Ours is a calculator, not a report: check the factors and your figures before you report them.
Scope 1 is what your company releases itself, from fuel, its vehicles and leaks. Scope 2 is what was released to make the electricity, heat or steam it buys.
It works out Scope 2 from the average emission factor of the grid where you use the electricity, whatever tariff you are on.
The market-based figure needs the factor from your own electricity contracts. This calculator does not ask for them yet, so it shows the location-based figure only.
From the UK Department for Energy Security and Net Zero, the US Environmental Protection Agency and the European Environment Agency. Each row names its publisher, year and licence.
We only use factors that are published under an open licence and measure the electricity itself. Where we have none for your country, type the factor your supplier or national publisher gives.
Yes. It is built for a company with a few sites: enter a year's fuel, vehicles, refrigerant and electricity bills.
No. The calculation runs in your browser, and nothing you type is saved or sent.
No. Scope 3 covers your value chain, such as purchased goods, travel and grid losses, and is not part of this calculator.
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