Several developments in the measurement of justice have drawn on Amartya Sen’s work on capabilities. This article addresses the relationship between Sen’s theoretical work and its interpretation in the measurement of justice, in particular by the United Nations Development Project (UNDP) and by the British Equality and Human Rights Commission and Government Equalities Office in its Equality Measurement Framework. It starts with a review of the diverse interpretations of Sen’s work, which range from considering it to be an innovative radical development to locating his work within the liberal tradition. Central to the article is the question of whether it is possible to develop a meaningful operationalization of Sen’s philosophical distincti...