What is the largest data set NumXL can support? Jacquie Nesbitt March 30, 2017 00:16 Follow NumXL can support a data set of 1,048,576 rows by 16,384 columns. NumXL is constrained by Microsoft Excel's limitations. For more information, you can check out Microsoft Excel's limitations here. Related articles Largest data set for DFT and IDFT? How do I compute the current volatility? How can I submit feedback or file a defect or claim? What are the system requirements for installing NumXL? Where are you located?