1. Enter a value
Type a number in the input field. You can use a period or comma as the decimal separator.
Convert decimal to hexadecimal
This converter converts decimal numbers to hexadecimal. Enter a number and the result appears instantly.
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When do you need to convert decimal to hexadecimal?
Hexadecimal (base-16) uses digits 0–9 and letters A–F. It is a compact way to represent binary data: each hex digit = 4 bits. This makes hex essential for programming, web colors, and memory addresses.
Web colors use hex: #FF5733 = red 255, green 87, blue 51. Memory addresses: 0x7FFF = 32,767. Unicode: U+00E9 = é.
Hex is more compact than binary: the byte 11111111 (8 digits) = FF (2 digits). This is why hex is preferred for displaying binary data.
All calculations run locally in your browser — nothing is sent to any server.
How to use the converter?
2. Read the result
The conversion result appears instantly in the field next to it – no clicking required.3. Copy or reverse
Click Copy result or use the Reverse button to convert in the opposite direction.
When is this converter useful?
CSS Colors
#FF0000 = 255 (red), #00FF00 = 255 (green).Programming
Memory addresses, bytes, Unicode character codes.Networking
MAC addresses, IPv6, network protocols.Debugging
Memory hex dumps, binary file analysis.
What makes this converter different?
Complete privacy
All calculations run locally in your browser. No data is sent to any server.Real-time results
The result updates instantly as you type – no need to click any button.Bidirectional conversion
The Reverse button lets you convert in both directions with one click.Reference table
A ready-made table with commonly converted values and contextual descriptions.
How does decimal to hex conversion work?
Repeatedly divide by 16 and record remainders (using A–F for 10–15). Read remainders bottom-to-top.
Example: 255 ÷ 16 = 15 R15 → F, 15 ÷ 16 = 0 R15 → F. Result: FF.
Each hex digit = 4 bits. Two hex digits = 1 byte (0–255). Four hex digits = 2 bytes (0–65,535).
Practical tips
- Hex digits: 0123456789ABCDEF. A=10, B=11, C=12, D=13, E=14, F=15.
- 1 byte: 00–FF (0–255). 2 bytes: 0000–FFFF (0–65,535).
- Common prefixes: 0x (programming), # (CSS colors), U+ (Unicode).
- MAC address: 6 bytes in hex, e.g. AA:BB:CC:DD:EE:FF.
Decimal vs Hexadecimal
| Feature | Decimal (base-10) | Hexadecimal (base-16) |
|---|---|---|
| Digits | 0–9 | 0–9, A–F |
| Example: 255 | 255 | FF |
| Example: 1000 | 1000 | 3E8 |
| Used for | Everyday math | Colors, addresses, data |
| Compactness | Standard | More compact than binary |
Decimal (base-10)
- Digits
0–9 - Example: 255
255 - Example: 1000
1000 - Used for
Everyday math - Compactness
Standard
Hexadecimal (base-16)
- Digits
0–9, A–F - Example: 255
FF - Example: 1000
3E8 - Used for
Colors, addresses, data - Compactness
More compact than binary
Convert Dziesiętny to other units
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Frequently asked questions
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