Hexadecimal to Decimal Converter
Type a hexadecimal number of any length to see it in decimal, with every step of the working.
Hexadecimal to decimal table
| Hexadecimal | Decimal |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 7 | 7 |
| 8 | 8 |
| A | 10 |
| F | 15 |
| 10 | 16 |
| 20 | 32 |
| 40 | 64 |
| 64 | 100 |
| 7F | 127 |
| 80 | 128 |
| FF | 255 |
| 100 | 256 |
| 3E8 | 1000 |
| 400 | 1024 |
Worked examples
10 in decimal
A (hexadecimal)
10 (decimal)
Decimal value 10.
255 in decimal
FF (hexadecimal)
255 (decimal)
Decimal value 255.
2026 in decimal
7EA (hexadecimal)
2026 (decimal)
Decimal value 2026.
About Hexadecimal to Decimal Converter
This converter turns hexadecimal numbers into decimal and shows how. To convert hexadecimal to decimal, multiply each hexadecimal digit by its place value, which is a power of 16, and add the results. For example, A in hexadecimal is 10 in decimal, and 7EA is 2026.
Hexadecimal packs four bits into each digit, which is why programmers use it for colours, memory addresses and raw data: it is far shorter than binary and converts to it directly. Decimal is the base 10 system we count in every day, with place values of ones, tens, hundreds and so on. Numbers of any length are converted exactly, because the tool works with whole numbers digit by digit instead of rounding.
How to use Hexadecimal to Decimal Converter
- Type or paste a hexadecimal number into the first box. Spaces, underscores and prefixes such as 0x are ignored.
- Read the decimal result straight away in the second box, grouped for easier reading if you leave the box ticked.
- Look at the working table to see each step of the method.
- Copy the result, or use the swap button to convert decimal back to hexadecimal.
Common uses
- Reading colour codes such as #FF8800 in web design
- Reading memory addresses, error codes and MAC addresses
- Debugging data in a hex editor or a network capture
- Programming in languages that write numbers as 0x values
Frequently asked questions
How do I convert hexadecimal to decimal by hand?
Multiply each hexadecimal digit by its place value, which is a power of 16, and add the results. The working table on this page shows exactly these steps for the number you type.
What is FF in decimal?
FF in hexadecimal is 255 in decimal. In decimal it is 255, the largest number that fits in one byte.
What is 7EA in decimal?
7EA in hexadecimal is 2026 in decimal.
Can it convert very large numbers?
Yes. Whole numbers with up to 4,096 digits are converted exactly. The working table shows the first rows when a number is very long.
Does it handle fractions or negative numbers?
Negative whole numbers are converted with their minus sign kept. Fractions are not supported, because many fractions that end in one base repeat for ever in another.