Abstract: Objective To analyze palm ratio of body surface area （BSA） based on the body different surface area formula. Methods Forty-four Chinese adult males were selected in this study. The contour of left single palm was recorded and the palm area was calculated by cut-paper weighing method. The body surface was calculated by the height and weight based on 12 formulas of body surface area. Then, the palm ratio of BSA was calculated. Results The average palm ratio of BSA was （0.789±0.075）%. The data showed statistically significant difference compared with the traditional ratio （1%） （P<0.05）. Conclusion The ratio of BSA in Chinese adult male population showed  more accuracy compared with the traditional ratio in this present study. The forensic evaluation can be affected by using the different ratio of BSA.

Key words: forensic medicine, palm, body surface area