77 in binary = 1001101 (100 1101)
In other bases: hexadecimal 4D, octal 115. The binary number has 7 bits.
Divide by 2 repeatedly and note each remainder. Read the remainders from bottom to top.
| Division | Quotient | Remainder |
|---|---|---|
| 77 ÷ 2 | 38 | 1 |
| 38 ÷ 2 | 19 | 0 |
| 19 ÷ 2 | 9 | 1 |
| 9 ÷ 2 | 4 | 1 |
| 4 ÷ 2 | 2 | 0 |
| 2 ÷ 2 | 1 | 0 |
| 1 ÷ 2 | 0 | 1 |
Remainders bottom to top: 1001101.
| Power of 2 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
|---|---|---|---|---|---|---|---|
| Bit | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
Add the powers of 2 where the bit is 1: 64 + 8 + 4 + 1 = 77.
Need another number or the reverse direction? Use the binary to decimal converter or the text to binary converter.
| Decimal | Binary | Hex | Octal |
|---|---|---|---|
| 73 | 1001001 | 49 | 111 |
| 74 | 1001010 | 4A | 112 |
| 75 | 1001011 | 4B | 113 |
| 76 | 1001100 | 4C | 114 |
| 78 | 1001110 | 4E | 116 |
| 79 | 1001111 | 4F | 117 |
| 80 | 1010000 | 50 | 120 |
| 81 | 1010001 | 51 | 121 |