Hex Calculator

Add, subtract, multiply and divide hexadecimal numbers and see the answer in hex, decimal, binary and octal. Example: 1A + FF = 119 in hex, which is 26 + 255 = 281.

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First number

Operation

Second number

How to use the Hex Calculator

Type the first number using only valid hex digits (0-9 and A-F).
Choose an operation and type the second number.
Press Calculate to see the answer in binary, decimal, hex and octal.

Formula and method

Hexadecimal is base 16: digits 0-9 then A=10 to F=15, and each place is a power of 16. 1A = 16 + 10 = 26. The calculator converts to decimal, applies the operation and converts back.

Worked example: 1A + FF

Step	Result
1A in decimal	26
FF in decimal	255
Sum	281
281 in hex	119

Hex digit values

Hex	Decimal	Binary
0	0	0000
1	1	0001
2	2	0010
3	3	0011
4	4	0100
5	5	0101
6	6	0110
7	7	0111
8	8	1000
9	9	1001
A	10	1010
B	11	1011
C	12	1100
D	13	1101
E	14	1110
F	15	1111

Where hex is used

Hex writes binary compactly: one hex digit equals four bits. It appears in color codes such as #FF8800, memory addresses and byte values.

Frequently asked questions

How do I add hex numbers?

Convert to decimal, add, and convert back, or add digit by digit carrying at 16.

What is FF in decimal?

255.

How do I convert hex to decimal?

Multiply each digit by its power of 16 and add.

What are A to F?

The digits 10 to 15.

Why is hex used in computing?

One hex digit equals four binary digits.

What is a hex color?

Three bytes in hex for red, green and blue, like #FF8800.

Sources

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Effortless Math Team

22 minutes ago