Hex to Decimal Converter
Convert hexadecimal to decimal numbers instantly. Free hex to decimal converter for programming.
How it works
Hexadecimal (base 16) uses digits 0-9 and letters A-F. Each hex digit represents a value from 0 to 15. This converter transforms any hexadecimal value to its decimal (base 10) equivalent.
Common Hex to Decimal
How to Convert Hexadecimal to Decimal
Hex (base 16) uses digits 0-9 and letters A-F (where A=10, B=11, C=12, D=13, E=14, F=15). To convert to decimal, multiply each digit by 16 raised to its position power (rightmost = 16^0). So 'FF' hex = (15 × 16) + (15 × 1) = 240 + 15 = 255 decimal.
Used in programming for memory addresses, color codes (#FF0000 = red), and unicode. A hex byte (00-FF) covers 0-255 in decimal. Two hex digits = 1 byte. The 6-character HTML colour codes (e.g. #2C3E50) are three byte values for red/green/blue intensity.
Common Hex to Decimal
| Hex | Decimal |
|---|---|
| 1 | 1 |
| A | 10 |
| F | 15 |
| 10 | 16 |
| 20 | 32 |
| FF | 255 |
| 100 | 256 |
| FFFF | 65535 |
Frequently Asked Questions
Why use hex instead of binary?
Hex is more compact - one hex digit = 4 bits. So a 32-bit number is 8 hex digits vs 32 binary digits. Easier to read and write. Computer science discussions and binary file inspection routinely use hex.
How are hex colours read?
RGB color codes use 6 hex digits: first 2 = red intensity (00-FF), next 2 = green, last 2 = blue. So #FF0000 = pure red. #00FF00 = green. #0000FF = blue. #FFFFFF = white. #000000 = black.