DAX Standard Deviation Measure

Notes

Use STDEVX.S instead of STDEVX.P if your data is a sample rather than the full population.

Requirements

• A table with a numeric column.

How to use this measure

1. In Power BI Desktop, select the table that should hold the measure and choose New measure on the ribbon.
2. Paste the code, then replace the placeholder table and column names with your own. The My table names fields above do this for you.
3. Run it through the DAX Formatter if you want it laid out in your team's style.

Related DAX measures

• Coefficient of VariationExpresses standard deviation as a percentage of the mean, for comparing variability across differently-scaled measures.
• Z-ScoreCalculates how many standard deviations a value is from the mean, for spotting outliers.
• Percentile (P90, P95)Calculates the 90th and 95th percentile of a numeric column, common thresholds for SLA and outlier analysis.
• MedianCalculates the median value of a numeric column across the current filter context.
• Outlier FlagFlags rows whose Z-Score falls outside a set threshold as statistical outliers.
• Mode (Most Frequent Value)Returns the most frequently occurring value in a column across the current filter context.

More DAX resources

Browse all 175 measures in the Power BI DAX Measures Library, or search the library for something similar to Standard Deviation.