Hex to Decimal Converter - Convert Base 16 Online

Convert hexadecimal to decimal and decimal to hex with color preview. Bidirectional conversion, quick results. 100% local execution.

Hexadecimal → Decimal

Hex (base 16)

Decimal (base 10)

Decimal → Hexadecimal

Decimal (base 10)

Hex (base 16)

Uppercase letters

Quick Reference

Decimal	Hex	Decimal	Hex	Decimal	Hex
0	0	10	A	100	64
1	1	11	B	128	80
2	2	12	C	200	C8
3	3	13	D	255	FF
4	4	14	E	256	100
5	5	15	F	512	200
6	6	16	10	1000	3E8
7	7	32	20	4096	1000
8	8	64	40	65535	FFFF
9	9	99	63	16777215	FFFFFF

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Frequently Asked Questions

Hexadecimal (hex) is base-16, using digits 0-9 and letters A-F. It's commonly used for colors, memory addresses, and encoding.

The 0x prefix is optional. Both 'FF' and '0xFF' work the same way.

No. 'ff', 'FF', and 'Ff' all represent the same value (255 in decimal).

Yes. All conversion happens in your browser using JavaScript. No data is sent to any server.

Hex is more compact for representing binary data. One hex digit represents 4 binary bits. It's easier to read than long binary strings and more precise than decimal for byte-level operations.

Hex colors are 6 digits: #RRGGBB. Each pair represents red, green, and blue values (00-FF or 0-255). For example, #FF0000 is pure red.

Very direct. Each hex digit maps to exactly 4 binary bits: 0=0000, 1=0001, ..., F=1111. This makes conversion between hex and binary straightforward.

Memory addresses, color codes, character encoding (Unicode), MAC addresses, cryptographic hashes, and low-level debugging. Any byte-oriented data benefits from hex.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A (10), B (11), C (12), D (13), E (14), F (15), 10 (16), 11 (17), etc.

Yes. Unicode uses hex notation like U+0041 for 'A' (decimal 65). Convert the hex part (0041) to decimal to get the code point value.

Hexadecimal → Decimal

Decimal → Hexadecimal

Quick Reference

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