30-seconds-of-code/blog_posts/js-decimal-to-hex.md

title, shortTitle, type, tags, expertise, author, cover, excerpt, firstSeen

title	shortTitle	type	tags	expertise	author	cover	excerpt	firstSeen
Tip: Convert decimal number to hexadecimal	Decimal to hexadecimal	tip	javascript,math	beginner	chalarangelo	blog_images/waves-from-above.jpg	Ever needed to convert a decimal number to hexadecimal? Here's a quick and easy way to do it.	2022-09-21T05:00:00-04:00

Numeric values are represented in decimal format by default, when converted to strings. If you want to display them in hexadecimal format, you can use Number.prototype.toString() and pass the base you want to use (16) as an argument.

const decimalToHex = dec => dec.toString(16);

decimalToHex(0); // '0'
decimalToHex(255); // 'ff'

Conversely, the opposite might also be needed. You can use parseInt() to convert a string to a number in a given base. If you don't specify a base, it will default to 10.

const hexToDecimal = hex => parseInt(hex, 16);

hexToDecimal('0'); // 0
hexToDecimal('ff'); // 255