HHV from LHV and Hydrogen Content

Higher calorific value (HHV) from lower calorific value + latent heat of water-vapour formed during combustion.

CombustionFuel

Lower calorific value (LCV)MJ/kgHydrogen content% m/m

Higher calorific value: 42.73MJ/kg

HHV − LCV: 2.23MJ/kg

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

HHV = LCV + 0.2122 \cdot H\%

Symbol	Meaning	Unit
$LCV$	Lower (net) calorific value	MJ/kg
$H$	Hydrogen mass %	% m/m
$HHV$	Higher (gross) calorific value	MJ/kg

Source: ASTM D240 / ISO 1928

In short

Higher calorific value (HHV) from lower calorific value + latent heat of water-vapour formed during combustion.

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