Hex to Decimal Calculator – Hexadecimal to Decimal
Convert hexadecimal (base 16) numbers to decimal (base 10) and binary.
About This Calculator
Convert hexadecimal (base 16) numbers to decimal (base 10) and binary. Use the calculator above for instant results.
Worked Examples
Example 1: FF
- 15×16 + 15×1 = 255 | 0xFF = max byte
Answer: 255
Example 2: 1A4F
- = 6,735 decimal
Answer: 6,735
Example 3: DEADBEEF
- = 3,735,928,559 decimal | Common debug value
Answer: 3,735,928,559
Who Uses This Calculator?
Programmers
Read hex values in code and memory.
Sysadmins
Interpret hex error codes.
CS Students
Number base conversion.
Web Developers
HTML color hex codes.
Common Mistakes to Avoid
❌ Hex digits A-F
A=10, B=11, C=12, D=13, E=14, F=15. Hex uses 16 symbols (0-9, A-F).
❌ 0x prefix
0x indicates hexadecimal in most programming languages. 0xFF = 255.
Frequently Asked Questions
Hex to decimal?
Each digit × 16^position. 2AF = 2×256 + 10×16 + 15 = 687.
Hex colors in HTML?
#RRGGBB where each pair is a byte (00-FF = 0-255). #FF0000 = red. #000000 = black. #FFFFFF = white.
Why hex in programming?
One hex digit = 4 bits = 1 nibble. Two hex digits = 8 bits = 1 byte. Much more compact than binary.