This article describes the development and psychometric testing of the Life Balance Inventory (LBI), an instrument created to measure the construct of life balance as conceptualized in the Life Balance Model. After initial item development based on theory, expert opinion, and feedback from 52 adults, rating and scoring mechanisms were established and two phases of pilot testing were completed. The first (N = 282 adults) and second (N = 458 adults) pilot testing phases used Rasch analysis that showed the items were capturing a range of balance traits and that the items fit intuitively with the model of life balance. The internal consistency of the LBI for both tests was good (Cronbach's alpha = 0.89 to 0.97). Confirmatory factor analysis for the four subscales of the LBI was inconclusive. The LBI has demonstrated acceptable internal consistency and content validity as a measure for life balance.
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