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All Tutorials /Power BI

How to Write DAX in Power BI

Updated on:
June 5, 2026
By:
Madhav Bhandari
Use this interactive demo to learn how to create and apply a DAX formula in Power BI.

Quick summary

Writing a DAX formula in Power BI lets you create custom measures that unlock deeper data analysis and reporting. This guide walks you through opening Table view, creating a New Measure, entering your expression, and committing it to your report.


Steps

  1. Open your dataset and click on Table view to access your loaded data.
  2. Select New Measure to open the DAX formula input area.
  3. Write your DAX (Data Analysis Expressions) formula in the empty formula field.
  4. Click the check icon to apply and commit the expression to your data model.
  5. Your DAX measure is now successfully created and ready to use in your Power BI report.

📌 Why this matters

DAX (Data Analysis Expressions) is the formula language that powers custom calculations and business logic inside Power BI. Writing DAX measures allows analysts and report builders to go beyond default aggregations and create precise, context-aware metrics tailored to their data model. Mastering DAX in Power BI is essential for building dynamic dashboards, calculating KPIs, and delivering actionable insights from complex datasets. This skill is a core requirement for any Power BI developer or data analyst working with enterprise reporting.
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