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Hex Calculator

Convert and calculate with hexadecimal numbers. Includes color preview for hex color codes and conversions to all number systems.

Hex Conversion Results

Hexadecimal (Base 16) 0
Decimal (Base 10) 0
Binary (Base 2) 0
Octal (Base 8) 0

How to Use the Hex Calculator

  1. Enter your hexadecimal number (0-9, A-F).
  2. Optionally select an arithmetic operation and enter a second hex value.
  3. Click "Calculate" to see conversions in all number systems.
  4. If the hex is a valid color code, see the color preview.

Frequently Asked Questions

What is hexadecimal?

Hexadecimal (base-16) uses digits 0-9 and letters A-F to represent values 0-15. It's widely used in computing because it's more compact than binary and easier to read. Each hex digit represents 4 binary digits (bits).

How do hex color codes work?

Hex color codes are 6-digit hex numbers representing RGB colors. The first two digits are red, middle two are green, last two are blue. For example, FF5733 means Red=FF (255), Green=57 (87), Blue=33 (51).

What are valid hex characters?

Valid hexadecimal characters are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F (or lowercase a-f). Letters A-F represent values 10-15 respectively.

How do I convert hex to decimal manually?

Multiply each hex digit by 16 raised to the power of its position (from right, starting at 0). For example, 2F = 2×16¹ + 15×16⁰ = 32 + 15 = 47 in decimal.

When is hexadecimal used in programming?

Hex is used for: memory addresses, color codes (web design), character encoding (ASCII/Unicode), debugging, representing binary data compactly, and in low-level programming for bit manipulation.