Ultrasound of the upper airway may prove to be a useful adjunct to traditional clinical assessment tools, as it has been successful in visualizing the proper anatomy and critical structures of the airway. We undertook this study to know the efficacy of ultrasound in determining parameters namely hyomental distance ratio (HMDR) and the anterior neck soft tissue thickness at vocal cords level (ANS-VC) and correlating them to the CL grading to predict difficult airway. US is a reliable instrument to anticipate difficult-airway in the pre-operative area by measuring the ratio of pre-epiglottic depth to epiglottis to midpoint of vocal cords, HMDR and ANS thickness at the level of vocal cords