9 in binary
9 in binary is 1001. In hexadecimal it is 9 and in octal 11.
9 in binary
Pick any whole number from 1 to 10,000.
How to work it out
- 1
Divide 9 by 2 again and again, writing down the remainder each time, until you reach 0.
- 2
Read the remainders from the bottom up: 1001.
- 3
Check by adding powers of 2: 8 + 1 = 9.
LaTeX source of the formulas on this page
\[ 9_{10} = 1001_{2} \]Dividing 9 by 2
| Number | Division | Remainder |
|---|---|---|
| 9 | 9 ÷ 2 = 4 | 1 |
| 4 | 4 ÷ 2 = 2 | 0 |
| 2 | 2 ÷ 2 = 1 | 0 |
| 1 | 1 ÷ 2 = 0 | 1 |
Questions
What is 9 in binary?
1001.
What is 9 in hexadecimal?
9.
What is 9 in octal?
11.
How many bits does 9 need?
4 bits.