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Use explicitly fictional input values
The activity is 12,000 kWh, equivalently 12 MWh. The demonstration factor is 0.4 kg CO2e/kWh, equivalently 400 kg CO2e/MWh or 0.4 tonnes CO2e/MWh. These are demonstration factors, not real grid data.
Calculate all three representations
| Representation | Calculation | Result |
|---|---|---|
| kWh and kg/kWh | 12,000 × 0.4 | 4,800 kg |
| MWh and kg/MWh | 12 × 400 | 4,800 kg |
| MWh and tonnes/MWh | 12 × 0.4 | 4.8 tonnes |
Inspect an unconverted combination
Multiplying 12 MWh directly by the numerical 0.4 from a per-kWh factor without converting units gives the wrong mass scale. The labels reveal the mismatch before interpreting the number.
Keep equivalent units from implying equivalent coverage
This check holds the factor definition fixed. A different dataset with the same units may cover different gases, geography or stages, so its product is not validated by this unit exercise alone.