Number Converter
Convert between binary, decimal, hex, octal and Roman numerals. Free and instant.
10 (Decimal (Base 10)) =
1010
Binary (Base 2)
With prefix: 0b1010
All conversions for 10 (Decimal (Base 10)):
Binary
1010
Octal
12
Decimal
10
Hexadecimal
A
Popular Conversions
Common Numbers Reference
| Decimal | Binary | Octal | Hex |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 2 | 10 | 2 | 2 |
| 5 | 101 | 5 | 5 |
| 8 | 1000 | 10 | 8 |
| 10 | 1010 | 12 | A |
| 15 | 1111 | 17 | F |
| 16 | 10000 | 20 | 10 |
| 32 | 100000 | 40 | 20 |
| 64 | 1000000 | 100 | 40 |
| 100 | 1100100 | 144 | 64 |
| 128 | 10000000 | 200 | 80 |
| 255 | 11111111 | 377 | FF |
| 256 | 100000000 | 400 | 100 |
| 512 | 1000000000 | 1000 | 200 |
| 1024 | 10000000000 | 2000 | 400 |
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Common Questions
What is binary?
Binary is a base-2 number system that uses only two digits 0 and 1. It is the fundamental language of computers. Every piece of data in a computer is ultimately stored as binary.
What is hexadecimal?
Hexadecimal is a base-16 number system using digits 0-9 and letters A-F. It is widely used in programming, color codes (#FF5733) and memory addresses because it represents binary data more compactly.
What is octal?
Octal is a base-8 number system using digits 0-7. It was historically used in computing and is still used in Unix file permissions and some programming contexts.
What are Roman numerals?
Roman numerals are a number system from ancient Rome using letters I, V, X, L, C, D and M. They are still used today in clock faces, book chapters, movie sequels and Super Bowl numbers.