Compressed-liquid densities and ambient-pressure densities and speeds of sound of four biomass-derived fuels have been measured. The compressed-liquid measurements were made from (270 to 470) K and (0.5 to 50) MPa. The ambient-pressure measurements were made from (278 to 343) K. Compressed-liquid density data at 10 MPa and below were extrapolated to 0.083 MPa and, in combination with the ambient-pressure data, fitted to a Rackets equation, to allow comparison of the two sources of data. Additionally, the compressed-liquid density data have been correlated to a Tait equation, and parameters are given for each fuel.