This article introduces number functions and their uses in Tableau. It also demonstrates how to create a number calculation using an example.
Why use number functions
Number functions allow you to perform computations on the data values in your fields. Number functions can only be used with fields that contain numerical values. For more information, see Data Types.
For example, you might have a field that contains values for the variance in your budget, titled Budget Variance. One of those values might be 7. You can use the ABS function to return the absolute value of that number, and all the other numbers in that field.
The calculation might look something like this:
ABS[Budget Variance]
Therefore, ABS(7) = 7.
Number functions available in Tableau
Function  Syntax  Description  
ABS 
 Returns the absolute value of the given number. Examples:
The second example returns the absolute value for all the numbers contained in the  
ACOS 
 Returns the arc cosine of the given number. The result is in radians. Example:
 
ASIN 
 Returns the arc sine of a given number. The result is in radians. Example:
 
ATAN  ATAN(number)  Returns the arc tangent of a given number. The result is in radians. Example:
 
ATAN2 
 Returns the arc tangent of two given numbers (x and y). The result is in radians. Example:
 
CEILING 

 
COS 
 Returns the cosine of an angle. Specify the angle in radians. Example:
 
COT 
 Returns the cotangent of an angle. Specify the angle in radians. Example:
 
DEGREES 
 Converts a given number in radians to degrees. Example:
 
DIV  DIV(integer1, integer2)  Returns the integer part of a division operation, in which integer1 is divided by integer2. Example:
 
EXP 
 Returns e raised to the power of the given number. Examples:
 
FLOOR 

 
HEXBINX 
 Maps an x, y coordinate to the xcoordinate of the nearest hexagonal bin. The bins have side length 1, so the inputs may need to be scaled appropriately. HEXBINX and HEXBINY are binning and plotting functions for hexagonal bins. Hexagonal bins are an efficient and elegant option for visualising data in an x/y plane such as a map. Because the bins are hexagonal, each bin closely approximates a circle and minimises variation in the distance from the data point to the centre of the bin. This makes the clustering both more accurate and informative. Example:
 
HEXBINY 
 Maps an x, y coordinate to the ycoordinate of the nearest hexagonal bin. The bins have side length 1, so the inputs may need to be scaled appropriately. Example:
 
LN 
 Returns the natural logarithm of a number. Returns  
LOG 
 Returns the logarithm of a number for the given base. If the base value is omitted, base 10 is used.  
MAX 
 Returns the maximum of the two arguments, which must be of the same type. Returns Examples:
 
MIN 
 Returns the minimum of the two arguments, which must be of the same type. Returns Examples:
 
PI 
 Returns the numeric constant pi: 3.14159.  
POWER 
 Raises the number to the specified power. Examples:
You can also use the ^ symbol:
 
RADIANS 
 Converts the given number from degrees to radians. Example:
 
ROUND 
 Rounds numbers to a specified number of digits. The Example: This example rounds every
Some databases, such as SQL Server, allow specification of a negative Note: because ROUND may run into issues due to the underlying floating point representation of numbers – such as 9.405 rounding to 9.40 – it may be preferable to format the number to the desired number of decimal points rather than rounding. Formatting 9.405 to two decimal places will yield the expected 9.41.  
SIGN 
 Returns the sign of a number: The possible return values are 1 if the number is negative, 0 if the number is zero, or 1 if the number is positive. Example: If the average of the profit field is negative, then
 
SIN 
 Returns the sine of an angle. Specify the angle in radians. Examples:
 
SQRT 
 Returns the square root of a number. Example:
 
SQUARE 
 Returns the square of a number. Example:
 
TAN 
 Returns the tangent of an angle. Specify the angle in radians. Example:
 
ZN 
 Returns the expression if it is not null, otherwise returns zero. Use this function to use zero values instead of null values. Example:

Create a number calculation
Follow along with the steps below to learn how to create a number calculation.
In Tableau Desktop, connect to the Sample  Superstore saved data source, which comes with Tableau.
Navigate to a worksheet and select Analysis > Create Calculated Field.
In the calculation editor that opens, do the following:
Name the calculated field Minimum Sales transaction
Enter the following formula:
MIN(Sales)
When finished, click OK.
The new number calculation appears under Measures in the Data pane. Just like your other fields, you can use it in one or more visualisations.
When Minimum Sales is placed on Text on the Marks card in the worksheet, its name is changed to AGG(Minimum Sales), which indicates that it cannot be aggregated any further, since it is already aggregated down to the lowest level of detail (the smallest sales value for all records).
This example shows the minimum sales per category.
When subcategory is brought into the view, the minimum sales for each subcategory are shown.
See Also
Tableau Functions (Alphabetical)