The density of diesel fuel can vary slightly depending on factors such as temperature and the specific formulation of the fuel. However, on average, the density of diesel fuel is around 0.85 to 0.90 grams per cubic centimeter (g/cm³) or 850 to 900 kilograms per cubic meter (kg/m³). It is important to note that density values can vary across different regions and fuel compositions, so it's always best to consult the specific fuel specifications or industry standards for precise values.