Everyday Tools

What Is Hexadecimal?

Hexadecimal (hex) is a base-16 number system that uses the digits 0–9 and the letters A–F to represent the values 10–15. Because one hex digit represents exactly four binary digits, hex is a compact way to write binary data, and it is used for web color codes, memory addresses, and error codes.

Converting to Decimal

Hex 2F = 2 × 16 + 15 = 47.

Color Codes

In #FF8800, the pairs FF, 88, and 00 give red, green, and blue values of 255, 136, and 0.

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🔗 Related Terms

Binary Number Data Storage Units (KB, MB, GB, TB) Aspect Ratio

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Last updated: September 29, 2026. This definition is for general educational purposes only. It is not financial, investment, tax, legal, or medical advice, and it does not recommend any product or course of action. For decisions about your own situation, consult a qualified professional.