The present paper aimed to develop and standardise a scale for assessing life skills in adults as per a ten-factor model given by World Health Organization (WHO), which was accomplished by revising a pre-existing 100-item life skills scale for adolescents. The objective was met in three consecutive studies. A revised 19-items life skills scale with a three-factor affective-behavioural-cognitive model (LS-ABC scale) was obtained in study 1 conducted on 311 adults. This model was re-verified on a new sample of 336 adults in study 2, which re-affirmed the results of study 1. Construct validity of the LS-ABC scale was established in study 3, where different established questionnaires along with LS-ABC scale were administered to 182 healthy adults and 34 adults with mental health issues. The final LS-ABC scale was found to be psychometrically sound and a reliable measure for assessing life skills in adult population.