Hex to Decimal Converter
Decode a base-16 number with MiniWebtool’s Hex to Decimal Converter. It accepts hexadecimal with or without a 0x prefix and shows each digit’s contribution to the decimal total, alongside binary and octal equivalents.
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Enter a hex number below, with or without 0x, to get its decimal value and how each digit contributes.
About Hex to Decimal Converter
Welcome to the Hex to Decimal Converter, a powerful free online tool for converting hexadecimal (base-16) numbers to decimal (base-10). Whether you are a programmer working with memory addresses, a web designer dealing with color codes, or a student learning number systems, this converter provides instant results with detailed step-by-step explanations.
At a Glance
Hex to Decimal Converter changes a base-16 number into decimal and shows how each digit adds to the total. Binary and octal equivalents appear beside the decimal result.
| Feature | What you get | Good for |
|---|---|---|
| Input formats | Accepts hex with or without the 0x prefix, in upper or lower case, up to 32 hex digits. | Values copied from code, memory addresses or color codes |
| Positional breakdown | Shows each digit multiplied by its power of 16 and the sum, for example 1A3 = 256 + 160 + 3 = 419. | Learning or checking the manual method |
| Digit table | A visual breakdown lists each hex digit with its decimal and binary equivalents. | Seeing what each digit contributes |
| Other bases | Also gives the binary and octal equivalents of the same number. | Comparing one value across number systems |
| Common values | A short list of reference conversions, such as 0xFF = 255 and 0xFFFF = 65,535, and a copy button for results. | Quick checks of familiar values |
What is Hexadecimal?
Hexadecimal (often called "hex") is a base-16 numeral system that uses 16 distinct symbols: the digits 0-9 represent values zero through nine, and the letters A-F represent values ten through fifteen. Each hex digit corresponds to exactly 4 binary bits, making it a compact way to represent binary data.
| Hex | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Dec | 0 | 1 | 2 | 3 | 4 |
| Bin | 0000 | 0001 | 0010 | 0011 | 0100 |
| Hex | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|
| Dec | 5 | 6 | 7 | 8 | 9 |
| Bin | 0101 | 0110 | 0111 | 1000 | 1001 |
| Hex | A | B | C | D | E |
|---|---|---|---|---|---|
| Dec | 10 | 11 | 12 | 13 | 14 |
| Bin | 1010 | 1011 | 1100 | 1101 | 1110 |
| Hex | F |
|---|---|
| Dec | 15 |
| Bin | 1111 |
How to Convert Hex to Decimal
The conversion process uses positional notation, where each digit's value depends on its position in the number:
- Enter your hex number: Type your hexadecimal number using digits 0-9 and letters A-F. You can include the 0x prefix if desired. The converter accepts both uppercase and lowercase letters.
- Click Convert: Press the Convert button to perform the conversion. The tool will validate your input and show an error if the hex number is invalid.
- View your results: See your decimal result along with binary and octal equivalents. The visual breakdown shows each hex digit's contribution to the final value.
- Review the step-by-step solution: Understand the conversion process through the detailed breakdown showing positional notation and how each digit contributes to the final decimal value.
Example: Converting 1A3 to Decimal
For the hex number 1A3:
- 1 is at position 2: 1 × 16² = 1 × 256 = 256
- A (=10) is at position 1: 10 × 16¹ = 10 × 16 = 160
- 3 is at position 0: 3 × 16&sup0; = 3 × 1 = 3
- Total: 256 + 160 + 3 = 419
Common Hex to Decimal Conversions
Why is Hexadecimal Used?
- Compact binary representation: One hex digit represents exactly 4 binary bits, making conversions straightforward.
- Memory addresses: Computer memory locations are typically displayed in hex (e.g., 0x7FFF5FBFF8E0).
- Web color codes: CSS colors use hex notation like #FF5733 (255, 87, 51 in RGB).
- MAC addresses: Network hardware identifiers use hex pairs (e.g., 00:1A:2B:3C:4D:5E).
- Assembly and machine code: Low-level programming often uses hex for readability.
- Unicode code points: Character encodings are expressed in hex (e.g., U+0041 for 'A').
Frequently Asked Questions
What is hexadecimal and how does it relate to decimal?
Hexadecimal (hex) is a base-16 number system using digits 0-9 and letters A-F, where A=10, B=11, C=12, D=13, E=14, F=15. Decimal is the base-10 system we use daily. Each hex digit represents 4 binary bits, making hex a compact way to represent binary data.
How do I convert hex to decimal manually?
To convert hex to decimal: 1) Write down each hex digit, 2) Assign positional weights from right to left starting at 16^0, 3) Convert each hex digit to its decimal value (A=10, B=11, etc.), 4) Multiply each value by its positional weight, 5) Sum all results. For example, 1A = 1×16 + 10×1 = 26.
Why is hexadecimal used in computing?
Hexadecimal is used because it compactly represents binary data. One hex digit equals exactly 4 binary bits, making conversions simple. Memory addresses, color codes (#FF5733), MAC addresses, and machine code are commonly displayed in hex for readability.
What are common hex to decimal conversions?
Common conversions: 0x10 = 16, 0xFF = 255, 0x100 = 256, 0x400 = 1024, 0x1000 = 4096. Web colors like #FFFFFF (white) = 16,777,215. Single hex digits: A=10, B=11, C=12, D=13, E=14, F=15.
Can I convert hex numbers with the 0x prefix?
Yes, this converter accepts hex numbers with or without the 0x prefix. Both '1A3F' and '0x1A3F' are valid inputs and will produce the same decimal result. The converter is case-insensitive, so 'ff', 'FF', and '0xFF' all work identically.
Related Resources
- Hexadecimal - Wikipedia
- Decimal to Hex Converter - Convert decimal numbers to hexadecimal
- Hex Calculator - Perform arithmetic and bitwise operations on hex numbers
- Hex Converter - Convert between hex, decimal, binary, and octal
- Binary to Decimal Converter - Convert binary to decimal
Reference this content, page, or tool as:
"Hex to Decimal Converter" at https://MiniWebtool.com/hex-to-decimal-converter/ from MiniWebtool, https://MiniWebtool.com/
by miniwebtool team. Updated: Jan 10, 2026
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