Hex Calculator
Convert hexadecimal to decimal, binary, octal. Add and subtract hex numbers. Essential for programming, web colors, and computer science. Free.
Hex Calculator
toolznova.com • Free Calculator
How to Use
Calculate hex in 3 steps.
Choose Mode
Select convert, add, subtract, or color code decoder.
Enter Values
Enter hex number, or choose source base for conversion.
Get Results
Click Calculate to see all number system representations.
Why ToolzNova?
Instant
Results in milliseconds.
Accurate
Precise formulas every time.
Private
No data sent anywhere.
Everywhere
Mobile, tablet, desktop.
Why Use Hex Calculator?
- Web Colors: HTML/CSS colors use hex codes (#FF5733).
- Programming: Memory addresses, registers, and flags in hex.
- Networking: MAC addresses and IPv6 use hex format.
- Computer Science: More compact than binary — 1 hex = 4 bits.
- Debugging: Memory dump and hex editor work in hexadecimal.
- Digital Electronics: Compact representation of binary data.
Tips & Examples
- Hex digits: 0-9 and A-F (A=10, B=11, C=12, D=13, E=14, F=15).
- FF = 255 in decimal = 11111111 in binary.
- #FFFFFF = white. #000000 = black. #FF0000 = red.
- Each hex digit represents exactly 4 binary bits.
- 2 hex digits = 1 byte = 0-255 decimal range.
- Hex addition: F+1 = 10 (16 in decimal, carry 1).
Free Hex Calculator Online
ToolzNova's free hex calculator converts hexadecimal to decimal, binary, and octal. Adds and subtracts hex numbers. Also decodes HTML/CSS color codes showing R, G, B values with a color preview.
Hexadecimal is base-16 number system using 0-9 and A-F. It provides a compact human-readable representation of binary data and is widely used in programming, web colors, and computer science.
Hex and Number Systems
Hex (base 16): each position is power of 16. FF = 15×16 + 15 = 255. Converting to binary: each hex digit = 4 bits. F = 1111, E = 1110, etc.