Hexadecimal to Decimal Converter

Q: How do you convert hexadecimal to decimal manually?

Multiply each digit by 16 raised to its position, from right to left. For example, 1A in decimal: (1×16) + (10×1) = 26. Our tool performs this calculation instantly, with no installation required.

Q: What is hexadecimal used for?

Base 16 is used in memory addresses, HTML and CSS colors, network device MAC addresses, operating system error codes, and low-level code debugging. Developers prefer it because it is more compact and readable than binary.

Q: What is the difference between hexadecimal, decimal, and binary?

Decimal uses base 10 (digits 0–9), binary uses base 2 (only 0 and 1), and hexadecimal uses base 16 (0–9 and A–F). Computers operate internally in binary, but hex is more compact and human-readable for representing large binary values. For example, the binary value 11111111 equals FF in hex and 255 in decimal.

Q: How do CSS colors use hexadecimal?

In CSS, colors are defined with 6 hexadecimal digits in the format #RRGGBB, where each pair represents the intensity of red, green, and blue on a scale from 00 to FF (0 to 255 in decimal). For example, #FF0000 is pure red, #000000 is black, and #FFFFFF is white.

Convert any hexadecimal value to decimal instantly. Perfect for developers, students, and IT professionals.

Hexadecimal value

Decimal value

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Quick Examples

FF = 255 · 1A = 26 · FF0000 = 16711680 · FFFF = 65535

Frequently Asked Questions

What is a hexadecimal number?

The hexadecimal system uses base 16, with digits 0–9 and letters A–F. It is widely used in programming, memory addressing, and CSS colors.

How do you convert hexadecimal to decimal manually?

Multiply each digit by 16 raised to its position. For example, 1A in decimal: (1×16) + (10×1) = 26. Our tool does this automatically.

What does FF mean in decimal?

FF in hexadecimal equals 255 in decimal. It is the maximum value of a single byte and represents full intensity in RGB color channels.

What is hexadecimal used for?

Base 16 is used in memory addresses, HTML/CSS colors, MAC addresses, system error codes, and low-level code debugging.

What is the difference between hexadecimal, decimal, and binary?

Decimal uses base 10 (0–9), binary uses base 2 (0 and 1), and hexadecimal uses base 16 (0–9 and A–F). Computers operate in binary, but hex is more compact and human-readable for representing large binary values.

How do CSS colors use hexadecimal?

In CSS, colors are written in hex with 6 digits: #RRGGBB. For example, #FF0000 is pure red (R=255, G=0, B=0). Each pair of digits represents the intensity of red, green, and blue.