Abstract: A system and computer implemented method for performing a field sobriety test on a user comprising a memory unit to store a base line sobriety score, and a set of program modules. The set of program modules comprises a display module, an input module and a sobriety test module. Further, the system comprises a sobriety tester module, configured to process the set of user responses. Furthermore, the sobriety tester module generates a sobriety score based on the plurality of sobriety test metrics. Furthermore, the sobriety test module classifies the user as one of sober and intoxicated based on the sobriety score being lesser than the baseline sobriety score.