basic

Dulong's Formula Higher Heating Value from Elements Calculator

HHV (kJ/kg) ≈ 338·C% + 1442·(H% − O%/8) + 94·S%.

Estimate the higher heating value (HHV) of a solid fuel (coal, biomass, wood) directly from its ultimate-analysis mass fractions of carbon, hydrogen, oxygen, and sulphur using the empirical Dulong formula: HHV (kJ/kg) ≈ 338·C% + 1442·(H% − O%/8) + 94·S%. Used widely for first-pass fuel screening.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

HHV (kJ/kg) ≈ 338·C% + 1442·(H% − O%/8) + 94·S%.

In depth

Estimate the higher heating value (HHV) of a solid fuel (coal, biomass, wood) directly from its ultimate-analysis mass fractions of carbon, hydrogen, oxygen, and sulphur using the empirical Dulong formula: HHV (kJ/kg) ≈ 338·C% + 1442·(H% − O%/8) + 94·S%. Used widely for first-pass fuel screening.