Purpose: Forward head posture and degree of anterior translation of head can be assessed using Cranio-vertebral angle (CV angle). Recent literatures use Electronic Head Posture Instrument (EHPI) to measure CV angle without exposing the patient to X-ray. Objective and Study design: This observational study was cross-sectionally designed and aimed to find out the reliability of Electronic Head Posture Instrument (EHPI) in measuring Cranio-Vertebral Angle of young adults. Methods: 100 apparently healthy young adults were assessed for the CV angle by two Physiotherapy student investigators who are skilled in measuring CV angle using EHPI in two separate sessions of 20 minutes gap with the same instrument. The measurements of CV angle by the two investigators were documented and taken for statistical analysis. Results: The mean difference in the Cranio-Vertebral Angle between the two measurements was 0.46 (+/-) 0.79. The inter-class correlation coefficient for inter-rater reliability of Cranio-Vertebral Angle (CV Angle) by Electronic Head Posture Instrument (EHPI) was 0.925, with the corresponding P=0.001. Conclusion: The study results exhibit a significant strong positive correlation between the two measurements supporting a high reliability of EHPI in measuring CV Angle.