225 in binary = 11100001 (1110 0001)
In other bases: hexadecimal E1, octal 341. The binary number has 8 bits.
Divide by 2 repeatedly and note each remainder. Read the remainders from bottom to top.
| Division | Quotient | Remainder |
|---|---|---|
| 225 ÷ 2 | 112 | 1 |
| 112 ÷ 2 | 56 | 0 |
| 56 ÷ 2 | 28 | 0 |
| 28 ÷ 2 | 14 | 0 |
| 14 ÷ 2 | 7 | 0 |
| 7 ÷ 2 | 3 | 1 |
| 3 ÷ 2 | 1 | 1 |
| 1 ÷ 2 | 0 | 1 |
Remainders bottom to top: 11100001.
| Power of 2 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|
| Bit | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 |
Add the powers of 2 where the bit is 1: 128 + 64 + 32 + 1 = 225.
Need another number or the reverse direction? Use the binary to decimal converter or the text to binary converter.
| Decimal | Binary | Hex | Octal |
|---|---|---|---|
| 221 | 11011101 | DD | 335 |
| 222 | 11011110 | DE | 336 |
| 223 | 11011111 | DF | 337 |
| 224 | 11100000 | E0 | 340 |
| 226 | 11100010 | E2 | 342 |
| 227 | 11100011 | E3 | 343 |
| 228 | 11100100 | E4 | 344 |
| 229 | 11100101 | E5 | 345 |