Hexadecimal to Decimal Converter

Enter a hex number below to convert it to a decimal.

Decimal Number:

Steps to Convert to Decimal

Learn how we calculated this below

How to Convert Hex to Decimal

The hexadecimal number system is a base 16 number system. It uses 16 digits, 0 to 9 and a to f. On the other hand, the decimal number system is a base 10 number system that uses ten digits, 0 to 9.

Considering that the decimal system is most commonly used, you’ll often need to convert a hex number to its decimal value. Hexadecimal numbers are often used in software and networking applications.

To convert a hexadecimal number to a decimal, you can use the positional notation method. To use this method, multiply each digit in the hex number from the rightmost number to the left by 16 to the power of n, where n is the distance from the right.

So, reading the hex number from right to left, the furthest digit to the right is equal to the digit times 16⁰. The digit that is one position from the right is equal to the digit times 16¹.

Hex to Decimal Formula

Thus, the hex to decimal formula is:

decimal number₁₀ = (d₀ × 16⁰) + (d₁ × 16¹) + … + (d_{n – 1} × 16^{n – 1})

In this formula, d₀ is the hex digit furthest to the right, d₁ is the digit one position from the right, and d_{n – 1} is the digit furthest to the left.

graphic showing how to convert a hex number to decimal

You can also use a tool like our hex calculator to convert to decimal or binary.

For example, let’s convert the hex number 1b7e to decimal.

decimal number₁₀ = (1 × 16³) + (11 × 16²) + (7 × 16¹) + (14 × 16⁰)
decimal number₁₀ = 4096 + 2816 + 112 + 14
decimal number₁₀ = 7038

How to Convert Fractional Hexadecimal Numbers to Decimal

For real hex numbers that contain fractional values, you can use the method above to convert as well, with a slightly different exponent value. Start by using the method above to convert the whole portion of the number from hex to decimal.

Then, for the remaining fractional value, multiply each number to the right of the decimal point by 16 to the power of -1 times the distance from the decimal point plus 1. That might seem complicated, but it’s easier than it sounds.

Let’s consider the implementation below:

decimal number₁₀ = (d_-1 × 16^-1) + (d_-2 × 16^-2) + … + (d_-n × 16^-n)

For example, let’s convert the hex number 0.c3f to decimal.

decimal number₁₀ = (12 × 16^-1) + (3 × 16^-2) + (15 × 16^-3)
decimal number₁₀ = (12 ÷ 16¹) + (3 ÷ 16²) + (15 ÷ 16³)
decimal number₁₀ = 0.75 + 0.01171875 + 0.003662109375
decimal number₁₀ = 0.765380859375

The calculator above can convert hex numbers to decimal, including fractional numbers like this one, along with negative numbers.

Hex to Decimal Conversion Table

The table below shows hexadecimal numbers and the equivalent decimal number values.

Hexadecimal numbers converted to the equivalent decimal values
Hexadecimal Number	Decimal Number
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
a	10
b	11
c	12
d	13
e	14
f	15
10	16
11	17
12	18
13	19
14	20
15	21
16	22
17	23
18	24
19	25
1a	26
1b	27
1c	28
1d	29
1e	30
1f	31
20	32
40	64
80	128
100	256
200	512
400	1024
800	2048

You might also be interested in our hex calculator to add or subtract hex numbers.

Frequently Asked Questions

When would you convert from hex to decimal?

You would convert from hex to decimal when you need a more human-readable number or when using the number outside of a computer system, such as when performing mathematical operations with a standard calculator.

What is 16 hex to decimal?

16 hex to decimal is 22.

How do you know if a number is hexadecimal or decimal?

It would be difficult to differentiate numbers 0-9, however, after 9 in the hex system, the digits are a, b, c, d, e, and f that represent 10-15. In many cases, hex numbers are prefixed with “0x” to denote that the number is a hexadecimal.

For instance, “0x27” is a hexadecimal equal to 39 in decimal, while “27” is already in decimal form.