Daily DAX : Day 414 SQRT

DAX Function: SQRT

Returns the square root of a number.

Syntax

SQRT(<number>)

Parameters

Parameter Description
<number> The number for which you want the square root. Must be a non-negative number.

Return Value

A decimal number representing the square root of the given number.

Note: If the input is negative, SQRT returns a blank (or an error in some contexts).

Common Use Cases

  • Calculating distances using the Pythagorean theorem (e.g., diagonal of a rectangle)
  • Computing standard deviation components or volatility in financial models
  • Geometry calculations (area of circles from diameter, etc.)
  • Normalizing or scaling data
  • Reverse-engineering squared values (e.g., getting original quantity from area or variance)

Examples

1. Simple Square Root

Square Root of 16 = SQRT(16)     -- Returns 4

2. Calculate Diagonal of a Rectangle (Pythagorean Theorem)

Diagonal = 
SQRT(
    POWER([Width], 2) + 
    POWER([Height], 2)
)

3. Safe SQRT (Avoid Errors on Negative Values)

Safe Square Root = 
IF(
    [Value] >= 0,
    SQRT([Value]),
    BLANK()
)

4. Distance from Origin in 2D

Distance from (0,0) = 
SQRT( [X]^2 + [Y]^2 )

Tip: Always ensure the input to SQRT is non-negative to avoid blank results in reports.

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