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Decimal to Hexadecimal Converter
Enter a decimal number to convert it to hexadecimal immediately. Paste multiple values (one per line) for bulk conversion. Arbitrary-precision math means even 128-bit values convert exactly.
Decimal to Hexadecimal Converter
How to convert decimal to hexadecimal
Decimal (base 10) is the everyday number system, using digits 0–9. Hexadecimal (base 16) uses 0–9 and A–F; each hex digit maps to exactly four bits, so one byte is always two hex digits (00–FF).
Worked example converting 214:
- Repeatedly divide 214 by 16 and read the remainders bottom-up to get D6.
- Result:
214(decimal) =D6(hexadecimal).
Accepted input formats
- Optional prefixes:
0b(binary),0o(octal),0x(hex). - Spaces, commas and underscores are ignored, so
1101_0110works. - A leading minus sign converts negative values (sign-magnitude, not two's complement).
- Hexadecimal is case-insensitive; output is upper-case.
Decimal to Hexadecimal reference table
| Decimal | Hexadecimal |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | A |
| 11 | B |
| 12 | C |
| 13 | D |
| 14 | E |
| 15 | F |
| 16 | 10 |
| 32 | 20 |
| 64 | 40 |
| 100 | 64 |
| 128 | 80 |
| 255 | FF |
| 256 | 100 |
| 1024 | 400 |
| 4096 | 1000 |
| 65535 | FFFF |
Frequently asked questions
What is 214 in hexadecimal?
214 in decimal equals D6 in hexadecimal.
Is there a size limit?
No practical limit. The converter uses JavaScript BigInt, so values with hundreds of digits convert exactly without rounding.
Is my data sent to a server?
No. The conversion runs entirely in your browser; nothing you type is uploaded.