The energy intensity and overall energetic efficiency of agricultural practices as exists in Bangladesh was determined. Results showed that total energy output increased from 69.87 GJha-1 to 82.08 GJha-1, with increasing commercial energy input from 17.94 GJha-1 to 27.10 GJha-1 in the study period of 1990 to 2005. The corresponding increase in energy intensity was 45.67 MJ/US$ (2000) to 54.47 MJ/US$ (2000). Energetic efficiency, calculated as the ratio of total output to input for different crops, using weight factor, decreased from 3.97 to 3.03 in the study period. The energetic efficiency declines with increasing energy input, and the result indicates that input energy increases faster compared to energy output. The mechanization index increased from 64% to 78% in the study period. However, our main goal being maximization of the output per unit agricultural land, the estimated change in efficiency with increasing input can play an important role in choosing the appropriate input for optimum
output.