Science & Environment
HHV vs LHV Fuel Heating Value Calculator
Convert between higher heating value (HHV) and lower heating value (LHV) based on hydrogen content.
Your inputs
Change any value to update the result instantly.
Lower heating value (LHV)
50.01 MJ/kg
HHV
55.5 MJ/kg
Water mass fraction produced
2.25 kg water/kg fuel
LHV/HHV ratio
0.901
Formula and working
LHV = HHV − (mass fraction H2O vapor × latent heat of vaporization)
- 1
Collect the inputs
Higher heating value (HHV) = 55.5 MJ/kg; Hydrogen mass fraction = 25 %
- 2
Apply the formula
LHV = HHV − (mass fraction H2O vapor × latent heat of vaporization)
- 3
Result
Lower heating value (LHV) = 50.01 MJ/kg
Frequently asked questions
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
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