Math functions rad2deg() to convert RAdian to Degree value in PHP

Convert radians to degrees

rad2deg() converts an angle measured in radians to degrees, which is often easier to display to users.

$radians = pi() / 2;
echo rad2deg($radians); // 90

Start with this current pattern. The examples below are retained for additional variations, output and reference.

<?Php
echo rad2deg(0); // Output is 0
echo "<br>";
echo rad2deg(PI()); // Output  180
echo "<br>";
echo rad2deg(PI()/2); // Output is 90
echo "<br>";
echo rad2deg(PI()/3); // Output is 60 
?>

Syntax

rad2deg(X);

X is the number representing angular value in radian. Output is in degree.

Example 1: Converting a Full Circle (2π Radians)

<?php
echo rad2deg(2 * M_PI);  // Output: 360
?>

Example 2: Converting Negative Radians to Degrees

<?php
echo rad2deg(-M_PI);  // Output: -180
?>

Example 3: Converting Small Values

<?php
echo rad2deg(0.1);  // Output: 5.7295779513
?>

Example 4: Converting Half Circle

<?php
echo rad2deg(M_PI);  // Output: 180
?>

Example 5: Degrees to Radians and Back

<?php
$degrees = 45;
$radians = deg2rad($degrees);
echo rad2deg($radians);  // Output: 45
?>

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Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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