16進数⇔10進数変換ツール

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はじめに

Hex ↔ Decimal Converter — Convert hexadecimal to decimal and back. Enter Convert, Hex to get an instant, accurate result.

計算式

Hex → decimal: each hex digit is a power of 16 (hexdec). Decimal → hex: repeated division by 16 (dechex).

ステップごとの説明

1. Enter the Convert.
2. Enter the Hex.
3. Click Calculate to see your result instantly.

実例

Example: With Convert = hex_to_dec, Hex = FF, the Hex ↔ Decimal Converter gives Decimal: 255.

よくある質問

Is hex case-sensitive?

No, both uppercase and lowercase hex digits (A-F/a-f) are accepted.

What is hex commonly used for?

Representing colors, memory addresses, and binary data compactly.

What inputs does the Hex ↔ Decimal Converter need?

You'll need to provide: Convert, Hex. All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Hex ↔ Decimal Converter?

The Hex ↔ Decimal Converter applies the formula exactly as calculated — Hex → decimal: each hex digit is a power of 16 (hexdec). Decimal → hex: repeated division by 16 (dechex). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Hex ↔ Decimal Converter free to use?

Yes, the Hex ↔ Decimal Converter is completely free, requires no signup, and runs instantly in your browser.

16進数⇔10進数変換ツールについて

The Hex ↔ Decimal Converter uses a real, verifiable formula — Hex → decimal: each hex digit is a power of 16 (hexdec). Decimal → hex: repeated division by 16 (dechex). — so results are accurate every time, not an approximation.