4 in binary is 100. 4 = 2^2, so its binary form is a 1 followed by 2 zero(s). In octal 4 is 4 and in hexadecimal it is 4. The bit pattern uses 3 bits and fits in 1 byte....
4 IN BINARY
100
3 bits · 1 byte · 1 one
Binary (base 2)
100
Octal (base 8)
4
Decimal (base 10)
4
Hexadecimal (base 16)
4
BCD
0100
Bit length
3
Byte count
1
Count of 1s
1
Count of 0s
2
Is power of 2
Yes ✓
Nearest 2ⁿ
2^2
HOW TO CONVERT 4 TO BINARY
Method: divide by 2, collect remainders
4 ÷ 2 = 2 remainder 0
2 ÷ 2 = 1 remainder 0
1 ÷ 2 = 0 remainder 1
Read remainders bottom to top: 100
VERIFY: BINARY BACK TO DECIMAL
1×2^2 + 0×2^1 + 0×2^0
= 4 = 4 ✓
FUN FACT
4 = 2 squared is the smallest composite number and the smallest perfect square. In binary, 4 = 100. Every time you square 2, you add a zero to the binary representation.
BIT PATTERN
Byte 1
POWERS OF 2 REFERENCE
| n | 2ⁿ | Binary | Hex |
|---|---|---|---|
| 0 | 1 | 1 | 1 |
| 1 | 2 | 10 | 2 |
| 2 | 4 | 100 | 4 |
| 3 | 8 | 1000 | 8 |
| 4 | 16 | 10000 | 10 |
| 5 | 32 | 100000 | 20 |
| 6 | 64 | 1000000 | 40 |
| 7 | 128 | 10000000 | 80 |
| 8 | 256 | 100000000 | 100 |
| 9 | 512 | 1000000000 | 200 |
| 10 | 1024 | 10000000000 | 400 |
| 15 | 32768 | 1000000000000000 | 8000 |
| 16 | 65536 | 10000000000000000 | 10000 |
Divide 4 by 2 repeatedly, collecting remainders. 4 div 2 = 2 remainder 0 -> 2 div 2 = 1 remainder 0 -> 1 div 2 = 0 remainder 1. Read remainders bottom to top: 100.
Verify: 1*2^2 + 0*2^1 + 0*2^0 = 4 = 4. Each bit position represents a power of 2, starting at 2^0 = 1 on the right.
4 in other bases: octal = 4, hexadecimal = 4. 4 = 2^2, so its binary form is a 1 followed by 2 zero(s).
The bit pattern uses 3 bits and fits in 1 byte. When stored as a full byte: 00000100.
4 decimal to binary: 4 div 2 = 2 remainder 0 -> 2 div 2 = 1 remainder 0 -> 1 div 2 = 0 remainder 1 -> read bottom to top: 100. Verify: 1*2^2 + 0*2^1 + 0*2^0 = 4. Octal: 4, Hex: 4.
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Last updated: April 29, 2026 · Formula verified by EagleCalculator team · Eagle-eyed accuracy for every calculation.