9 decimal to binary
9 = 1001
9 in decimal is 1001 in binary. Divide 9 by 2 repeatedly and read the remainders backwards to get 1001.
Nearby values
| Decimal | Binary |
|---|---|
| 4 | 100 |
| 5 | 101 |
| 6 | 110 |
| 7 | 111 |
| 8 | 1000 |
| 9 | 1001 |
| 10 | 1010 |
| 11 | 1011 |
| 12 | 1100 |
| 13 | 1101 |
| 14 | 1110 |
Frequently asked questions
What is 9 decimal in binary?
9 in decimal is 1001 in binary. Divide 9 by 2 repeatedly and read the remainders backwards to get 1001.
How do you work out 9 decimal by hand?
Divide 9 by 2 repeatedly and read the remainders backwards to get 1001. The reference table on this page lists the neighbouring values so you can check the result.
Convert any value
Use the full decimal to binary converter for other values, or the number base converter for all four bases at once.