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Hex ↔ Decimal Converter

Convert between hexadecimal, decimal, binary and octal — type in any field.

HexadecimalBase 16 — 0–9, A–F

DecimalBase 10 — 0–9

BinaryBase 2 — 0 and 1

OctalBase 8 — 0–7

Hex Color Codes

Hex is commonly used for web colors. A color like #FF5733 = R:255, G:87, B:51.

About Hex ↔ Decimal Converter

Converting between different units and formats shouldn't require googling formulas or downloading apps. Hex ↔ Decimal Converter handles it instantly in your browser, letting you convert between hexadecimal, decimal, binary and octal — type in any field with precision. Results update in real time as you type, and all processing happens locally on your device.

How to Use

Enter a value Type the number you want to convert into the input field.

Select units Choose the source and target units from the dropdown menus.

Get instant results The converted value appears immediately as you type — no button press needed.

Copy the result Click the Copy button or select the output value to copy it for use elsewhere.

🔒 Privacy note: All processing happens locally in your browser. Your data is never sent to any server.

Why Use Hex ↔ Decimal Converter?

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Real-Time Conversion Results update instantly as you type — no need to press a button. Quickly compare multiple values or find the exact conversion you need.

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High Precision Hex ↔ Decimal Converter uses accurate conversion factors from international standards. Results are precise enough for engineering, scientific, and professional use.

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Mobile Ready Fully responsive design works perfectly on phones and tablets. Great for quick conversions when you're shopping, cooking, or traveling.

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All Common Units Covers the most commonly needed unit conversions, including both metric (SI) and imperial systems, so you always find what you're looking for.

Frequently Asked Questions

0xFF is a common prefix for hex numbers in programming. FF hex = 255 decimal = 11111111 binary. It represents the maximum value of a single byte.

Since base 16 needs 16 digits but we only have 0–9 (10 digits), letters A–F represent 10–15. So A=10, B=11, C=12, D=13, E=14, F=15.

One hex digit can represent values 0–15 (16 values). Two hex digits = one byte (0–255). Four hex digits = 16-bit value (0–65535).