EEOI - Energy Efficiency Operational Indicator

Cargo-work-based CO₂ intensity per MEPC.1/Circ.684 - grams CO₂ per tonne-mile of cargo actually carried. The oldest of the IMO operational intensity metrics.

IMOOperationalMEPC.1/Circ.684

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{EEOI} = \frac{\sum_j F_j \cdot C_{f,j} \cdot 10^6}{\sum_i (m_i \cdot D_i)}

Symbol	Meaning	Unit
$\text{EEOI}$	Energy Efficiency Operational Indicator	g CO₂ / (t cargo · nm)
$F_j$	Mass of fuel $j$ burned in the reporting period	t
$C_{f,j}$	CO₂ conversion factor for fuel $j$	t CO₂ / t fuel
$m_i$	Cargo mass carried on voyage $i$	t
$D_i$	Distance of voyage $i$	nm
$10^6$	Unit conversion tonnes → grams

Source: IMO MEPC.1/Circ.684 - EEOI guidelines; IMO MEPC.364(79) - Cf conversion factors

In short

Compute EEOI per MEPC.1/Circ.684 - cargo-work CO₂ intensity (grams CO₂ per tonne-mile of cargo actually carried).

Learn the theory BIMCO CII and Emissions Clauses