Calculators / Scope 3
Upstream fuel and energy calculator
Scope 3 category 3: emissions from producing and delivering the fuels and energy you use. Enter the same quantities as in your Scope 1 and Scope 2 calculations.
Enter an amount to see the emissions and the factor behind them.
Guides
- Fuel combustion emissions: natural gas, diesel, LPG and heating oil
How to calculate Scope 1 emissions from fuels with DESNZ 2026 factors: choosing the right unit, gross vs net calorific value, biofuel blends, and common errors.
- Purchased heat and steam: Scope 2 emissions from district heating
How to report heat, steam and cooling bought from a network: Scope 2 calculation, distribution losses and upstream emissions in Scope 3, with DESNZ 2026 factors.
- Scope 3 category 3: well-to-tank and grid losses explained
What Scope 3 category 3 covers, the four activities in the GHG Protocol guidance, and a worked UK example with gas and electricity using DESNZ 2026 factors.
- UK electricity emission factor (DESNZ 2026): what each number covers
The four UK government electricity factors for 2026, generation, grid losses and their upstream emissions, which scope each belongs to, and how they add up per kWh.
- The 15 Scope 3 categories explained
All 15 Scope 3 categories of the GHG Protocol in one place: what each covers, upstream versus downstream, which calculation methods apply, and where to start.
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