LCV from ISO 8217 Analysis

Calculate lower calorific value from measured density, water, sulphur and ash using the ISO 8217 / ASTM D4868 estimation formula. The IMO DCS fallback when a direct LCV test isn't on the BDN.

VoyageBunkersLCV

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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{GCV} = 46.423 - 8.792 \rho_{15}^2 \cdot 10^{-6} - 3.170 \rho_{15} \cdot 10^{-3}

Symbol	Meaning	Unit
$\text{GCV}$	Gross (higher) calorific value	MJ / kg
$\text{LCV}$	Lower (net) calorific value - used in MRV/DCS energy	MJ / kg
$\rho_{15}$	Density at 15 °C	kg / m³
$w$	Water content	% m/m
$s$	Sulphur content	% m/m
$a$	Ash content	% m/m
$H$	Hydrogen content - approximated $26 - 15\rho/1000$ for residuals	% m/m

Source: ASTM D4868 - standard test method for gross heat of combustion; ISO 8217 - marine fuels specification, Annex G

In short

Estimate lower calorific value from density, water, sulphur and ash per ASTM D4868 / ISO 8217 Annex G.

Learn the theory Bunker Quality and ISO 8217 Marine Fuel Standards