FF in hexadecimal is 11111111 in binary
All conversions
| Unit | Symbol | Value |
|---|
Quick answer
To convert hexadecimal to binary, read the digits as a base-16 number and rewrite the same whole number in base 2. For example, FF in hexadecimal is 11111111 in binary.
How to Convert Hex to Binary
Read the digits as a base-16 number and rewrite the same whole number in base 2. FF in hexadecimal is 11111111 in binary. Type any value in the converter above for an instant answer, or use the chart below for the most common values.
This page is preset for hexadecimal to binary conversions, but you can switch either list to any of the 39 units in the Numbers Converter, or go the other way with the Binary to Hex converter.
Hex to Binary conversion chart
| Hex | Binary |
|---|---|
| 0 base 16 | 0 base 2 |
| 1 base 16 | 1 base 2 |
| 2 base 16 | 10 base 2 |
| 3 base 16 | 11 base 2 |
| 4 base 16 | 100 base 2 |
| 5 base 16 | 101 base 2 |
| 6 base 16 | 110 base 2 |
| 7 base 16 | 111 base 2 |
| 8 base 16 | 1000 base 2 |
| 9 base 16 | 1001 base 2 |
| A base 16 | 1010 base 2 |
| B base 16 | 1011 base 2 |
| C base 16 | 1100 base 2 |
| D base 16 | 1101 base 2 |
| E base 16 | 1110 base 2 |
| F base 16 | 1111 base 2 |
| 10 base 16 | 10000 base 2 |
| 11 base 16 | 10001 base 2 |
| 12 base 16 | 10010 base 2 |
| 13 base 16 | 10011 base 2 |
| 14 base 16 | 10100 base 2 |
| 15 base 16 | 10101 base 2 |
| 16 base 16 | 10110 base 2 |
| 17 base 16 | 10111 base 2 |
| 18 base 16 | 11000 base 2 |
| 19 base 16 | 11001 base 2 |
| 1A base 16 | 11010 base 2 |
| 1B base 16 | 11011 base 2 |
| 1C base 16 | 11100 base 2 |
| 1D base 16 | 11101 base 2 |
| 1E base 16 | 11110 base 2 |
| 1F base 16 | 11111 base 2 |
| 20 base 16 | 100000 base 2 |
| 32 base 16 | 110010 base 2 |
| 40 base 16 | 1000000 base 2 |
| 64 base 16 | 1100100 base 2 |
| 7F base 16 | 1111111 base 2 |
| 80 base 16 | 10000000 base 2 |
| FF base 16 | 11111111 base 2 |
| 100 base 16 | 100000000 base 2 |
| 1F4 base 16 | 111110100 base 2 |
| 200 base 16 | 1000000000 base 2 |
| 3E8 base 16 | 1111101000 base 2 |
| 400 base 16 | 10000000000 base 2 |
| 1000 base 16 | 1000000000000 base 2 |
| FFFF base 16 | 1111111111111111 base 2 |
| 1A3 base 16 | 110100011 base 2 |
Common Hex to Binary conversions
- FF in hexadecimal is 11111111 in binary
- A base 16 = 1010 base 2
- F base 16 = 1111 base 2
- FF base 16 = 11111111 base 2
- 1A3 base 16 = 110100011 base 2
- FFFF base 16 = 1111111111111111 base 2
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How to Use the Hex to Binary Converter
- Type a value in the From box and choose its unit.
- Pick the unit you want in the To list — the result updates as you type.
- Use the swap button to reverse the conversion, or type in the To box to convert backwards.
- Check the All conversions table to see your value in every unit; click a row to make it the target.
Frequently Asked Questions
How do I convert Hex to Binary?
Read the digits as a base-16 number and rewrite the same whole number in base 2. For example, FF in hexadecimal is 11111111 in binary. Type any hexadecimal number in the converter above to get the binary value instantly.
What is the Hex to Binary formula?
Read the digits as a base-16 number and rewrite the same whole number in base 2.
What is A in binary?
A in hexadecimal = 1010 in binary.
What is F in binary?
F in hexadecimal = 1111 in binary.
What is FF in binary?
FF in hexadecimal = 11111111 in binary.
What is 1A3 in binary?
1A3 in hexadecimal = 110100011 in binary.
What is FFFF in binary?
FFFF in hexadecimal = 1111111111111111 in binary.
How do I convert Binary back to Hex?
Use the swap button in the converter above, or open our Binary to Hex converter. Read the digits as a base-2 number and rewrite the same whole number in base 16.
Is this Hex to Binary converter accurate?
Yes. It uses exact unit definitions and double-precision maths, and you can show up to 15 significant digits. The table below is calculated with the same formula.
Can I convert Hex to other numbers units?
Yes — pick any unit in the From and To lists above, or open the full Numbers Converter, which handles 39 numbers units.
Is the Hex to Binary converter free?
Yes, it is free with no sign-up, and every conversion runs in your browser so nothing is sent to a server.