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Introducing Dynamic Format Strings

Dynamic format strings in Power BI introduce a whole new level of flexibility by allowing users to define formatting rules that can adapt based on specific conditions or user interactions. By using dynamic format strings, users can enhance their visualizations by dynamically changing the formatting of measures to provide contextual insights and improve data comprehension.


Implementing Dynamic Format Strings in Power BI

Implementing dynamic format strings in Power BI involves utilizing the power of DAX (Data Analysis Expressions), the formula language used in Power BI. DAX provides a set of functions that enable users to define complex formatting rules based on logical conditions and calculations.

Users can create measures with DAX formulas that dynamically evaluate conditions and return a specific format string based on those conditions. These format strings can include placeholders for values, symbols, colours, or any other formatting element supported by Power BI. By combining DAX functions and format strings, users can create dynamic and context-aware measure formatting that adapts to changes in data and user interactions.

To use this feature, go to the File > Options and settings > Options > Preview features > turn on the “Dynamic formatting for measures”. After you turn on the feature, press measure that you want to have a dynamic format, then go to Measure tolls tab > Change format to Dynamic > A new dropdown will appear to the left of the DAX formula bar, and it will be on “Format” > Create DAX expression for your dynamic format.

By default, whatever static format string corresponds to the previous Format dropdown will be pre-populated to get you started, but you can also delete it and use whatever DAX expression you want for your dynamic format string.

For this example, we will add currency symbol in income table based on their country. We already have Country Currency table with its format.


Then the income by country column will have different symbol based on its country.


List cases of using Dynamic Format Strings in Power BI

Here's a list of examples showcasing different scenarios where dynamic format strings can be used in Power BI:

1. Conditional Formatting based on Thresholds:

a. Format sales measure differently based on low, average, and high thresholds.

b. Highlight values in red if they fall below a certain target and in green if they exceed it.

2. Time Period Formatting:

a. Format dates dynamically based on the selected time period (e.g., day, month, year).

b. Adjust the display of dates to show only the month and year for a higher-level overview.

3. Currency Formatting:

a. Format currency values dynamically based on the selected currency or country.

b. Change the currency symbol and decimal places based on user preferences.

4. Percentage Formatting:

a. Format percentages dynamically based on positive or negative growth rates.

b. Display percentage values as red for negative values and green for positive values.

5. Colour Coding based on Ranges:

a. Assign different background colours to measure values based on predefined ranges.

b. Highlight values in a heat map format to visually represent varying degrees of performance.

6. Dynamic Font Sizes:

a. Change the font size of measure values based on their magnitude or relevance.

b. Increase the font size for important metrics to draw attention.

7. Goal-based Formatting:

a. Format values based on progress towards a predefined goal or target.

b. Show progress bars or indicators with different colours based on the achievement level.

8. Data-driven Formatting:

a. Dynamically format values based on the data source or context.

b. Adjust formatting based on the type of data being displayed (e.g., numbers, text, dates).

Enhanced Visualizations and Improved Insights

By harnessing the capabilities of dynamic format strings in Power BI, users can unlock a new level of visual impact and analytical depth in their reports and dashboards. Dynamic formatting allows for the presentation of data in a more intuitive and meaningful way, enabling users to identify trends, outliers, and patterns effortlessly. This leads to improved insights and better decision-making across various domains such as sales, finance, marketing, and operations.


Dynamic format strings in Power BI offer an exciting opportunity to take measure formatting to the next level. By leveraging the power of DAX and creating measures with dynamic format strings, users can enhance visualizations, provide contextual insights, and improve data comprehension. This capability empowers users to create more engaging and interactive reports and dashboards, leading to more impactful data-driven decision-making. As Power BI continues to evolve, dynamic format strings will undoubtedly remain a valuable tool for unleashing the full potential of data visualization.

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