Diesel prices changed this year. Does that distort a spend-based emissions estimate?
Yes. If you estimate from rupees, a price rise looks like more fuel and a price cut looks like less. Convert spend to litres with the price on each invoice date, or better, use the litres printed on the invoice. Emissions follow litres, not rupees.
Why it matters
Spend-based factors assume a fixed price. When the pump price moves, the same litres produce a different rupee total and a different estimate.
Fix it
- Use litres from the invoice where shown.
- Otherwise divide spend by the pump price on that date.
- Note which months were estimated.
Same fuel, two estimates
- Rs 9,00,000 at Rs 90 per litre = 10,000 L
- Rs 9,00,000 at Rs 95 per litre = 9,474 L
- Using 90 overstates by 526 L, about 1,410 kg CO2
What Senseible does here
Senseible reads quantities, dates and units from your bills and invoices and shows the factor and source used on every line.
Sources: GHG Protocol Corporate Standard, IPCC 2006 Guidelines, Volume 2: Energy
Last reviewed 2026-10-22.