1001 Octal to Binary
1001 octal = 1000000001 binary
1001 written in binary is 10 0000 0001, the number 513 in everyday decimal.
1001 octal = 1000000001 binary
How to convert 1001 to binary
Because 8 = 23, every octal digit stands for exactly 3 binary digits. Write each octal digit as 3 binary digits:
| Binary group | Octal digit |
|---|---|
001 | 1 |
000 | 0 |
000 | 0 |
001 | 1 |
Result: 1001 in octal = 1000000001 in binary (leading zeros dropped).
1001 (octal) in other systems
| Decimal | 513 |
| Roman numerals | DXIII |
| Hexadecimal | 201 |
| Duodecimal | 369 |
| Ternary | 201000 |
| Base 36 | E9 |
| Vigesimal | 15D |
| Quaternary | 20001 |
| Quinary | 4023 |
| Senary | 2213 |
Nearby octal to binary conversions
| 774 to binary | 111111100 |
| 775 to binary | 111111101 |
| 776 to binary | 111111110 |
| 777 to binary | 111111111 |
| 1000 to binary | 1000000000 |
| 1002 to binary | 1000000010 |
| 1003 to binary | 1000000011 |
| 1004 to binary | 1000000100 |
| 1005 to binary | 1000000101 |
| 1006 to binary | 1000000110 |
About the number 513
- 513 is an odd number.
- 513 is not a prime number.
- Written in binary it needs 10 bits, so it fits in 2 bytes.
Reverse conversion
Frequently asked questions
What is 1001 in binary?
1001 in octal is 1000000001 in binary (the number 513 in decimal).