Voyage Fuel & CO₂

Estimate fuel consumption and CO₂ emissions for a single voyage from engine powers, SFOC, hours underway and at anchor, with a per-fuel Cf split.

VoyageIMOFuel

Main engine leg

Main engine power at voyage loadkWTypically 75–85 % MCR for a laden voyage.Main engine SFOCg/kWhModern two-stroke ≈ 170–180 g/kWh; older plant 190–210.Hours at seah

Auxiliary load

Auxiliary engine power at average loadkWAux SFOCg/kWhHours auxiliaries runninghUsually sea + port hours combined.

Fuels

Main engine fuelAuxiliary fuel

ME fuel: 420.00t

AE fuel: 43.68t

Total fuel: 463.68t

Total CO₂: 1,447.92t

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

F = \frac{P \cdot h \cdot \text{SFOC}}{10^6}, \quad \text{CO}_2 = F \cdot C_f

Symbol	Meaning	Unit
$F$	Fuel mass consumed on the voyage	t
$P$	Delivered engine power at voyage load	kW
$h$	Hours operated at that load	h
$\text{SFOC}$	Specific fuel consumption at the running load	g / kWh
$C_f$	CO₂ conversion factor for the fuel burned	t CO₂ / t fuel
$10^6$	Grams → tonnes conversion

Source: IMO MEPC.364(79) - Cf conversion factors; IMO MEPC.282(70) - SEEMP guidance on voyage measurement

In short

Estimate a voyage's fuel burn and CO₂ from engine powers, SFOC, hours underway and Cf factors.

Learn the theory Voyage Estimation: TCE, Bunkers, and Canal Economics