Unit Converter — Whether you are cooking, traveling, shipping a package, or writing code, converting between units should be instant. This converter covers length, weight, temperature, area, volume, speed, time, and data storage with precise conversion factors, plus a full breakdown across every unit in the category.
All conversions happen locally in your browser. No values are sent anywhere.
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Unit Converterとは？
Whether you are cooking, traveling, shipping a package, or writing code, converting between units should be instant. This converter covers length, weight, temperature, area, volume, speed, time, and data storage with precise conversion factors, plus a full breakdown across every unit in the category.
Every conversion runs locally with the browser’s native number handling, so your values are never transmitted — and the results update as you type.
使い方
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Pick a category
Length, weight, temperature, area, volume, speed, time, or data.
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Choose the units
Select the unit you have and the unit you want, or swap them with one click.
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Type a value
The result appears instantly, along with every other equivalent value.
使用例
Miles to kilometers
A 5-mile run converted to the metric system.
5 mi
結果： 8.05 km
Fahrenheit to Celsius
A 350 °F oven in Celsius.
350 °F
結果： 176.67 °C
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Last reviewed: 2026-09-25