An empirical correlation is presented for calculating the lower heating value (LHV) of gases obtained from the gasi cation of the most common types of biomass. Four types of equation are considered (polynomial, power, exponential, and logarithmic), all containing the process temperature (maximum) parameter; they were obtained by interpolating experimental data available in the literature on the volumetric composition of the gas discharged by gasi ers. On the strength of a statistical analysis, it emerged that although all four were valid within the temperature range considered, the polynomial correlation was the one that came closest to the experimental values.