Stop Rewriting DAX! Create User Defined Functions UDFs in Power BI Step by Step
In this Power BI tutorial, I’ll show you — step by step — how to create and use User Defined Functions (UDFs) in DAX.
This new Power BI feature lets you build your own reusable DAX functions, so you can clean up your measures, save time, and write more efficient code.
You’ll learn everything from enabling the feature to writing your first UDF, testing it, and using it in your model.
🧠 What You’ll Learn
✅ What DAX User Defined Functions are
✅ How to enable and use UDFs in Power BI
✅ Writing, testing, and saving UDFs step-by-step
✅ The difference between VAL and EXPR parameters
🕒 Timestamps
0:00 – Intro: what is UDF and why to use them
2:00 – Enable User Defined Functions in Power BI
2:20 – Create your first UDF in DAX Query View
4:15 – Save and call your UDF from a measure
5:08 – Difference between VAL vs EXPR explained with examples
8:13 – Wrap-up + download links
📂 Resources
📊 Download PBIX file → https://sugar-syntax.kit.com/e6ce4a7512
📑 Free PDF: Top 10 MUST-KNOW DAX Functions → https://sugar-syntax.kit.com/e6ce4a7512
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In this channel I post Power BI tutorials on how to improve your Power BI dashboard. I share tips for Power BI beginners. Learn more about Power BI ( DAX, Power Query, dataflows), Power Automate and Microsoft Fabric.
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