Converting ASCII to hexadecimal is a common task in computer programming. ASCII is a character encoding standard that assigns a unique number to each character. Hexadecimal, on the other hand, is a base-16 number system that uses sixteen digits, 0 through 9 and A through F. Converting ASCII to hexadecimal involves converting each character to its corresponding hexadecimal value.
Conversion
Here's a step-by-step guide on how to convert ASCII to hexadecimal:
- Choose the ASCII character you want to convert to hexadecimal.
- Convert the ASCII character to its decimal value using an ASCII table.
- Convert the decimal value to hexadecimal using the division-by-16 method.
- Pad the hexadecimal value with leading zeros to make it 2 digits long (if necessary).
Example
Let's walk through an example to illustrate the process. Suppose we want to convert the ASCII character 'A' to hexadecimal.
- The ASCII value of 'A' is 65.
- To convert 65 to hexadecimal, we use the division-by-16 method. We divide 65 by 16 and get a quotient of 4 with a remainder of 1. We write down the remainder (1) as the least significant digit of the hexadecimal value. We then divide 4 by 16 and get a quotient of 0 with a remainder of 4. We write down the remainder (4) as the next digit of the hexadecimal value. The hexadecimal value of 65 is 41.
- Since the hexadecimal value we obtained in step 2 is only 2 digits long, we don't need to pad it with leading zeros.
| Quotient | Remainder | Hexadecimal |
|---|---|---|
| 1 | 1 | |
| 4 | 41 |
ASCII-Hexadecimal Table
Here's a table of the ASCII characters and their corresponding hexadecimal values:
| Character | Description | Decimal | Hexadecimal |
|---|---|---|---|
| 0 | Zero | 48 | 30 |
| 1 | One | 49 | 31 |
| 2 | Two | 50 | 32 |
| 3 | Three | 51 | 33 |
| 4 | Four | 52 | 34 |
| 5 | Five | 53 | 35 |
| 6 | Six | 54 | 36 |
| 7 | Seven | 55 | 37 |
| 8 | Eight | 56 | 38 |
| 9 | Nine | 57 | 39 |
| A | Capital A | 65 | 41 |
| B | Capital B | 66 | 42 |
| C | Capital C | 67 | 43 |
| D | Capital D | 68 | 44 |
| E | Capital E | 69 | 45 |
| F | Capital F | 70 | 46 |
| G | Capital G | 71 | 47 |
| H | Capital H | 72 | 48 |
| I | Capital I | 73 | 49 |
| J | Capital J | 74 | 4A |
| K | Capital K | 75 | 4B |
| L | Capital L | 76 | 4C |
| M | Capital M | 77 | 4D |
| N | Capital N | 78 | 4E |
| O | Capital O | 79 | 4F |
| P | Capital P | 80 | 50 |
| Q | Capital Q | 81 | 51 |
| R | Capital R | 82 | 52 |
| S | Capital S | 83 | 53 |
| T | Capital T | 84 | 54 |
| U | Capital U | 85 | 55 |
| V | Capital V | 86 | 56 |
| W | Capital W | 87 | 57 |
| X | Capital X | 88 | 58 |
| Y | Capital Y | 89 | 59 |
| Z | Capital Z | 90 | 5A |
| a | Small a | 97 | 61 |
| b | Small b | 98 | 62 |
| c | Small c | 99 | 63 |
| d | Small d | 100 | 64 |
| e | Small e | 101 | 65 |
| f | Small f | 102 | 66 |
| g | Small g | 103 | 67 |
| h | Small h | 104 | 68 |
| i | Small i | 105 | 69 |
| j | Small j | 106 | 6A |
| k | Small k | 107 | 6B |
| l | Small l | 108 | 6C |
| m | Small m | 109 | 6D |
| n | Small n | 110 | 6E |
| o | Small o | 111 | 6F |
| p | Small p | 112 | 70 |
| q | Small q | 113 | 71 |
| r | Small r | 114 | 72 |
| s | Small s | 115 | 73 |
| t | Small t | 116 | 74 |
| u | Small u | 117 | 75 |
| v | Small v | 118 | 76 |
| w | Small w | 119 | 77 |
| x | Small x | 120 | 78 |
| y | Small y | 121 | 79 |
| z | Small z | 122 | 7A |
See full ascii table here.
Sample Code
This code requires @ilihub/code npm package to run.
import { AsciiToHexadecimal } from "@ilihub/code";
const ascii = "Hello World";
const hexadecimal = AsciiToHexadecimal(ascii);
console.log(hexadecimal);
// Output
// 48656C6C6F20576F726C64
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