HEX to Binary

HEX to Binary Converter Tool

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Best HEX to Binary Converter Tool

The base 16, also known as hexadecimal (abbreviated to hex) numbering system is regularly used in computer coding for conveniently representing a byte or word of data. This guide shows you how to convert from hex to binary and binary to hexadecimal.

Decimal, the Base 10 Numbering System

Before we learn how to convert hex to binary, let's try and understand how the base 10 system works.

The decimal, also known as the denary or base 10 numbering system that we use in everyday life makes use of ten symbols or numerals: 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.

So to count you start with 0, then continue 1...2...3...4...5...6...7...8...9

What happens when you get to ten? There's no numeral for ten, so it's represented as


Which means 1 ten and no units

Similarly when you get to 99, there's no numeral for one hundred, so you write one hundred as 100.

So writing a number in the base 10 system involves using numerals in a "units", "tens", "hundreds", "thousands" place and so on

So 145 really means "one hundred, 4 tens and 5 units" although we just think of it as the number one hundred and forty five.

Hexadecimal, the Base 16 Numbering System

Hexadecimal or "hex" is a numbering system which uses 16 different numerals. We saw that decimal used ten numerals from 0 to 9. Hex expands on this by adding six more, the capital letters A, B, C, D, E and F.

So to count from 0 to 9 you go 0...1...2...3...4...5...6...7...8...9

But what happens next?

Simply continue with A...B...C...D...E...F which represents 10, 11, 12, 13, 14 and 15 decimal.

Binary, the Base 2 Numbering System

The binary system used by computers is based on 2 numerals; 0 and 1. So you count 0, 1, there is no numeral for 2, so 2 is represented by 10 or "one 2 and no units". In the same way that there is a units, tens, hundreds, thousands place in the decimal system, in the binary system there is a units, twos, fours, eights, sixteens place etc. in the binary system.

How to Convert Hex to Binary

Converting from hex to binary is straightforward since hexadecimal numbers are simplified versions of binary strings. You just need to remember that each hex value will produce four binary digits.

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