During the last decade, sustainability and sustainability accounting have become an important part of business processes, as companies struggle to find new and successful ways towards long-term viability. The increasing pressure from stakeholders for companies to actively account for their sustainability related activities increases the demand for valid and reliable approaches to measure corporate sustainability. My PhD project explores and develops different methods for measuring sustainability related concepts. It researches questions including how (not) to measure sustainability theoretically or how can we use computer assisted and artificial intelligence tools in the measurement process? The project first theoretically investigates the current state of measurement tools and then focuses on developing new tools by text analysis in the programming language Python. The methodology is archival research and applies computer assisted procedures including natural language processing, computer-aided text analysis, topic modeling and dictionary development in Python.