T-SQL - RADIANS() Function

The T-SQL (Transact-SQL) RADIANS() function returns an angle measured in degrees to an approx. equivalent angle measured in radians.

Syntax

RADIANS(x)

Parameters

Return Value

Returns the angle measured in radians (data type of returned value matches with x).

Example 1:

The example below shows the usage of RADIANS() function.

SELECT RADIANS(0);
Result: 0

SELECT RADIANS(30.0);
Result: 0.5235987755982988

SELECT RADIANS(60.0);
Result: 1.0471975511965976

SELECT RADIANS(90.0);
Result: 1.5707963267948966

SELECT RADIANS(180.0);
Result: 3.141592653589793

SELECT RADIANS(-90.0);
Result: -1.5707963267948966

SELECT RADIANS(-180.0);
Result: -3.141592653589793

Example 2:

Consider a database table called Sample with the following records:

The statement given below can be used to convert the records of column x (containing values expressed in degrees) into radians.

SELECT *, RADIANS(x) AS RADIANS_Value FROM Sample;

This will produce the result as shown below: