2進数⇔10進数変換ツール

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はじめに

Binary ↔ Decimal Converter — Convert between binary and decimal instantly. Enter Convert, Binary to get an instant, accurate result.

計算式

Binary → decimal: each bit is a power of 2 (bindec). Decimal → binary: repeated division by 2 (decbin).

ステップごとの説明

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

実例

Example: With Convert = bin_to_dec, Binary = 1010, the Binary ↔ Decimal Converter gives Decimal: 10.

よくある質問

Does this support negative numbers?

Yes, a leading minus sign is handled and preserved in the result.

Is there a size limit?

Limited only by PHP's native integer range on your server.

What inputs does the Binary ↔ Decimal Converter need?

You'll need to provide: Convert, Binary. 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 Binary ↔ Decimal Converter?

The Binary ↔ Decimal Converter applies the formula exactly as calculated — Binary → decimal: each bit is a power of 2 (bindec). Decimal → binary: repeated division by 2 (decbin). — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Binary ↔ Decimal Converter free to use?

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

2進数⇔10進数変換ツールについて

The Binary ↔ Decimal Converter uses a real, verifiable formula — Binary → decimal: each bit is a power of 2 (bindec). Decimal → binary: repeated division by 2 (decbin). — so results are accurate every time, not an approximation.