DAX code
Null / Blank Count =
COUNTROWS(FILTER('Sales', ISBLANK('Sales'[ColumnName])))
Counts how many rows have a blank value in a given column.
Type your table and column names once. Every measure below updates.
Null / Blank Count =
COUNTROWS(FILTER('Sales', ISBLANK('Sales'[ColumnName])))
Replace 'Sales'[ColumnName] with the column you want to check for missing values.
Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Null / Blank Count.