単位換算ツール
すばやく、正確に。無料で使える単位換算。
クイック換算
数値を入力するだけで、結果がすぐに更新されます。
人気の換算
すべて見るすべてのカテゴリ
すべてのカテゴリを見る特別なツール
1つの入力で、複数の単位へ。
下の数値を変えると、すべての結果が同時に更新されます。
UnitConvert を選ぶ理由
- 正確で信頼できる結果
- 242以上の単位換算に対応
- 登録不要で完全無料
- あらゆる端末で利用可能
- シンプルで高速、使いやすい
人気のガイド
よくある質問
How accurate are the conversion results?
Calculations use standard conversion factors and JavaScript double-precision arithmetic. Results use a readable rounded display. Enable More precision for up to 10 significant digits; rounding only happens for display.
Can I use this converter for commercial purposes?
Yes. The converter is free for personal and commercial use. Verify results independently for safety-critical or regulated work.
Do you support metric and imperial units?
Yes. Length, weight, area, volume and speed include metric and imperial units. Volume units labeled US use US customary definitions.
How do I suggest a new unit conversion?
See the About page for the data format. Adding a unit to a category generates compatible conversion pages at the next build.
Is there a mobile app?
This website works on phones, tablets and desktops. You can bookmark it or add it to your home screen from your browser.
Converter controls, navigation and category names are available in 日本語. Unit names, guides and reference articles are currently in English. Explore English guides.