1 in Binary
1 in binary is 1. It takes 1 bit to write, and as a full byte it is 00000001.
How to convert 1 to binary
Divide by 2, write down the remainder, and repeat with the quotient until it reaches 0. The remainders, read from the last row up to the first, spell out 1.
| Division | Quotient | Remainder |
|---|---|---|
| 1 ÷ 2 | 0 | 1 |
Check it the other way
To verify, read 1 left to right, giving each digit its place value and adding up the places that hold a 1.
| Bit | Place value | Contributes |
|---|---|---|
| 1 | 20 = 1 | 1 |
Adding the contributions: 1 = 1. The conversion checks out.
1 in every base
| Format | Value |
|---|---|
| Binary | 1 |
| Decimal | 1 |
| Hexadecimal | 1 |
| Octal | 1 |
| As a byte (8-bit) | 00000001 |
Worth knowing about 1
One is the other binary digit, the on state, and the only positive number that looks identical in binary, decimal, hex, and every other base.
Convert another number
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Nearby numbers
Or browse the full table at numbers in binary.
FAQ
What is 1 in binary?
In binary, 1 is written 1. That is 1 digit, each one a power of two: the pattern says which of 1, 2, 4, 8, and so on to add together to make 1. Computers store it as the byte 00000001, padding the front with zeros.
How many bits does 1 need?
It takes 1 bit to write 1 in binary, since 1 has 1 digit and dropping any of them would change the value. Real hardware rounds up to whole bytes, so 1 normally sits in eight bits as 00000001, with the unused positions set to zero.
What is 1 in hex?
In hex, 1 is written 1. Because 16 is a power of two, hex lines up neatly with binary: one hex digit always covers four bits, so 1 compresses cleanly. The octal form, common in file permissions, is 1. Same number, three different notations.