無料単位変換ツールオンライン | Fairmont AI

単位をオンラインで無料変換。長さ・重さ・温度・速度など。即時単位換算計算機。

Our free Unit Converter lets you instantly convert between hundreds of units across six major categories: length, weight, temperature, speed, area, and volume. Whether you

How to Use the Unit Converter

  1. Select a Category: Choose the type of measurement you want to convert: Length, Weight, Temperature, Speed, Area, or Volume.
  2. Choose From and To Units: Select the unit you're converting from and the unit you're converting to using the dropdown menus.
  3. Enter Your Value: Type your value in the input field and see the converted result appear instantly on the right.

Frequently Asked Questions

What unit categories does this converter support?

The converter supports Length, Weight, Temperature, Speed, Area, and Volume with over 50 individual units across all categories.

How accurate are the conversions?

All conversions use precise mathematical factors with up to 10 significant digits of precision, suitable for both everyday and technical use.

Does it support temperature conversion?

Yes. The temperature category supports Celsius (°C), Fahrenheit (°F), and Kelvin (K) with proper non-linear conversion formulas.

Can I convert from any unit to any other unit?

Yes, within a category. You can convert any supported unit to any other unit in the same category.

What is the base unit used for conversions?

Each category has a base unit (meters for length, kilograms for weight, Celsius for temperature, etc.). All conversions go through the base unit.

Why use metric vs imperial units?

Most of the world uses the metric (SI) system for science and everyday use. The US primarily uses the imperial system. Our converter supports both for seamless international use.

Can I convert area units?

Yes. The Area category supports mm², cm², m², km², in², ft², acres, and hectares.

Can I convert volume and cooking measurements?

Yes. Volume includes scientific units (ml, l, m³) and cooking units (tsp, tbsp, fl oz, cup, pint, quart, gallon).