Digital transformation plays an important role in accelerating climate action in Asia and the Pacific and achieving the Sustainable Development Goals (SDGs). However, the linkages between digital transformation and climate change mitigation and adaptation are complex. In order to support governments in making informed decisions and prioritizing digital investments for transformative SDG outcomes, this paper presents a matrix to measure the impact of digital transformation on SDG 13 (climate action) implementation. The impact matrix builds on the Digital Transformation Index framework of the United Nations Economic and Social Commission for Asia and the Pacific, and can be used as a descriptive, explanatory and prescriptive tool for evidence-based policymaking. Based on this impact matrix, policy and regulatory recommendations are provided to drive positive net impacts of digital transformation on climate action. In addition, the paper offers some concrete next steps for the refinement of the methodology and adoption of the matrix in policymaking.