Reference

Binary, Decimal, Hex: A Practical Cheat Sheet for Developers

A fast reference with conversion patterns, nibble tricks, and worked examples for binary, decimal, and hexadecimal.

February 25, 2026

2 min read

By Binary Code Translator

#binary#decimal#hex#reference#developer-tools

Binary decimal hex cheat sheet

When debugging bytes, logs, or packet data, speed matters. This is the cheat sheet I wish every dev had open.

Core Mapping

Binary is base-2.
Decimal is base-10.
Hex is base-16.

Hex is compact and maps cleanly to binary:

1 hex digit = 4 bits (one nibble)
2 hex digits = 8 bits (one byte)

Instant Nibble Table

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

Worked Examples

Example 1: Binary to Hex

11110000 -> split as 1111 0000 -> F0

Example 2: Hex to Binary

2A -> 2 is 0010, A is 1010 -> 00101010

Example 3: Binary to Decimal

00101010 = 32 + 8 + 2 = 42

Example 4: Decimal to Binary

42 = 32 + 8 + 2 -> 00101010

Common Developer Patterns

0xFF as mask for one byte.
0x0F and 0xF0 for low/high nibble operations.
Byte arrays shown in hex logs (DE AD BE EF style).

Practice Set

Try converting:

0x7F
10000000
255
0x2A
01010101

Use:

Binary, Decimal, Hex: A Practical Cheat Sheet for Developers

Core Mapping

Instant Nibble Table

Worked Examples

Example 1: Binary to Hex

Example 2: Hex to Binary

Example 3: Binary to Decimal

Example 4: Decimal to Binary

Common Developer Patterns

Practice Set

References

Core Mapping

Instant Nibble Table

Worked Examples

Example 1: Binary to Hex

Example 2: Hex to Binary

Example 3: Binary to Decimal

Example 4: Decimal to Binary

Common Developer Patterns

Practice Set

References