How do I convert decimal to hexadecimal?

Divide the decimal number by 16 repeatedly, recording remainders. Remainders 10-15 become A-F. Read remainders bottom-up for the hex result.

Decimal 255 in hexadecimal is FF. Since 255 = 15Ã—16 + 15, and 15 = F, we get FF.

What is hexadecimal used for?

Hexadecimal is widely used in programming for memory addresses, color codes (#RRGGBB), HTML colors, machine code, and debugging.

Decimal to Hexadecimal Converter

Convert decimal (base 10) numbers to hexadecimal (base 16) instantly with step-by-step explanation. Essential for programmers, web developers, and students.

Pro Tip: Need to convert between Decimal, Binary, Hex & Octal all at once? Open All-in-One Converter

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Quick Reference — Decimal to Hex Table

Decimal	Hex	Decimal	Hex	Decimal	Hex
0	0	6	6	12	C
1	1	7	7	13	D
2	2	8	8	14	E
3	3	9	9	15	F
4	4	10	A	16	10
5	5	11	B	255	FF

What is Hexadecimal (Hex)?

The hexadecimal system (base 16) uses 16 symbols: digits 0–9 and letters A–F. A=10, B=11, C=12, D=13, E=14, F=15. It is widely used in computing because one hex digit maps perfectly to 4 binary bits (a nibble), making it a compact and human-readable way to represent binary data.

How to Convert Decimal to Hex Step by Step

Divide the decimal number by 16 repeatedly, recording remainders. Replace remainders â‰¥10 with A–F. Read remainders bottom-up.

Example: Convert 254 to hex
254 ÷ 16 = 15  remainder 14 → E   ← LSD
 15 ÷ 16 = 0   remainder 15 → F   ← MSD
Result (bottom to top): FE

Hex in Web Development

HTML/CSS color codes use hexadecimal: #RRGGBB. Each pair represents Red, Green, Blue from 00 (0) to FF (255). For example, #FF0000 is pure red. Memory addresses in programs are shown in hex: 0x1A2B3C4D. Understanding hex is essential for web developers, network engineers, and embedded programmers.

Frequently Asked Questions

How do I convert decimal to hex?

Divide by 16 repeatedly, note remainders (10=A, 11=B...15=F), read bottom-up. Or use this free online tool for instant results.

What is 255 in hexadecimal?

255 in hex is FF. Each F represents 15 in decimal, and 15 Ã— 16 + 15 = 255. It appears in CSS as the maximum color value (#FFFFFF = white).

What does 0x mean in programming?

"0x" is the prefix indicating a hexadecimal number in most programming languages (C, C++, Java, JavaScript, Python). For example, 0xFF means hex FF = decimal 255.