Energy & Sustainability worked example

Carbon Emissions Calculator with activity quantity of 312,500 activity units: a worked example

What does the result look like when activity quantity reaches 312,500 activity units? The full calculation is worked below with real intermediate numbers. a sustainability or carbon accounting analyst needs a CO2e estimate from activity data and an emissions factor

The inputs for this scenario

  • Activity quantity (fuel, energy, or material): 312,500 activity units (raised for this scenario; the documented default is 125,000)
  • Emissions factor: 0.39 kg CO2e / activity unit (unchanged)
  • Oxidation, loss, or GWP factor: 1 x (unchanged)
  • Reporting boundary multiplier: 1 x (unchanged)

Working through the calculation

  • Applying the documented formula (Base emissions = activity quantity × emissions factor × oxidation, loss, or GWP factor) to the inputs above produces each figure below.
  • At this operating point the engine returns 120,625 kg CO2e for reported co2e emissions, the number this scenario is built around.
  • At this operating point the engine returns 120,625 kg CO2e for base emissions before boundary adjustment.
  • At this operating point the engine returns 1 x for reporting boundary multiplier.
  • At this operating point the engine returns 120,625 kg CO2e for activity emissions before gwp adjustment.

How this compares with the baseline

  • Against the tool's baseline example, where activity quantity sits at 125,000 activity units and the headline result is 48,250 kg CO2e, this scenario comes in 150% above the baseline at 120,625 kg CO2e.
  • A figure at this level is achievable when activity quantity is genuinely sustained, not just peaked for a shift. The result is only as accurate as the emissions factor and boundary you choose; using an outdated grid factor or the wrong scope can shift the answer by double digits.

Results at a glance

  • Reported CO2e emissions: 120,625 kg CO2e (headline result)
  • Base emissions before boundary adjustment: 120,625 kg CO2e
  • Reporting boundary multiplier: 1 x
  • Activity emissions before GWP adjustment: 120,625 kg CO2e

Run it with your numbers

  • Every input above is editable in the live Carbon Emissions Calculator calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.