EPL - Engine Power Limitation for EEXI

Compute the main-engine MCR reduction needed to move an existing ship from its pre-limitation Attained EEXI down to the Required EEXI - the cheapest route to compliance for many operators.

IMODesignMEPC.328(76)

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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

k_\text{MCR} = \left(\frac{\text{EEXI}_\text{required}}{\text{EEXI}_\text{attained}^\text{before}}\right)^{3/2}

Symbol	Meaning	Unit
$k_\text{MCR}$	Fraction of nameplate MCR retained
$\text{EEXI}_\text{required}$	Compliance target	g CO₂ / (t·nm)
$\text{EEXI}_\text{attained}^\text{before}$	Pre-limitation attained EEXI	g CO₂ / (t·nm)
$Reduction \%$	$(1 - k_\text{MCR}) \cdot 100$	%

Source: IMO MEPC.335(76) - EPL & ShaPoLi guidelines; IMO MEPC.328(76); IMO MEPC.1/Circ.850/Rev.3 - minimum propulsion-power floor

In short

Compute the main-engine MCR reduction needed for EEXI compliance via Engine Power Limitation (EPL). Standard route for existing ships.

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