How do I calculate the emissions of a passenger ferry trip?
Multiply the litres of diesel burnt per trip by 2.68 kg CO2 per litre, then divide by passengers carried for a per-person figure. Use the fuel log, not the engine rating. A ferry that also carries vehicles should split fuel by deck area or weight before dividing.
Data you need
- Diesel bought per month from fuel invoices.
- Trips run and passengers carried per month.
- Vehicles carried, if any.
For staff travel
A company whose staff commute by ferry counts it in Scope 3 Category 7, using the operator's per-passenger figure or a fuel-based estimate.
What Senseible does here
Senseible reads bills, fuel invoices and production records into dated, fingerprinted records, so the figure you send a buyer can be traced to its documents.
Sources: GHG Protocol Corporate Standard, IPCC 2006 Guidelines, Volume 2: Energy
Last reviewed 2026-10-22.