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JavaScript - convert degrees to radians (deg to rad)

4 points
Created by:
Kate_C
19790

In this article, we're going to have a look at how to convert degrees to radians using JavaScript. In JavaScript there is no built-in conversion method. It is necessary to write own one.

Conversion can be made with following formula:

Simple implementaion is presented below.

1. Custom conversion method example

// ONLINE-RUNNER:browser;

function degToRad(deg) {
    return deg* (Math.PI / 180.0);
}

// Usage example:

console.log( degToRad(   0.0 ) ); // 0                                 0.0 radians
console.log( degToRad(  90.0 ) ); // 1.5707963267948966       ~Math.PI / 2 radians
console.log( degToRad( 180.0 ) ); // 3.141592653589793            ~Math.PI radians

console.log( degToRad(  30   ) ); // 0.5235987755982988       ~Math.PI / 6 radians
console.log( degToRad(  45   ) ); // 0.7853981633974483       ~Math.PI / 4 radians
console.log( degToRad(  90   ) ); // 1.5707963267948966       ~Math.PI / 2 radians
console.log( degToRad( 180   ) ); // 3.141592653589793            ~Math.PI radians
console.log( degToRad( 270   ) ); // 4.71238898038469     ~3 * Math.PI / 2 radians
console.log( degToRad( 360   ) ); // 6.283185307179586        ~2 * Math.PI radians

See also

  1. JavaScript - convert radians to degrees (rad to deg)

Merged questions

  1. How to make conversion from radians to degrees in JavaScript?
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