This document discusses the development of an Agriculture Transformation Index (ATI) to measure and monitor sustainable agriculture. It notes the many existing indicator initiatives that lack conceptual frameworks and the ability to inform decisions. The document reviews evidence on indicators and finds most lack rigorous sampling, consistent measurement, and integration of biophysical and socioeconomic data. It explores measuring agriculture at different scales and sectors and balancing productivity, environmental, and social goals. The document discusses features an effective ATI would require and proposes ATI sub-indices and indicators. It analyzes the purposes and users an ATI could serve at different scales. The creation of an ATI is presented as a promising initiative to align goals, identify risks, benchmark progress, and monitor interventions toward sustainable