Unit Converter – Length, Weight, Area, Volume, Speed & Temperature
Convert instantly between dozens of units across 6 categories: length, weight, area, volume, speed and temperature.
About Unit Converter
Convert instantly between 40+ units across 6 categories: length, weight, area, volume, speed and temperature (Celsius, Fahrenheit, Kelvin). Our free unit converter uses exact official conversion factors — perfect for cooking, travel, science, engineering and schoolwork.
📖 The Full Guide
Kitchen measurements, travel conversions, cm to inches, Fahrenheit to Celsius and the exact official factors — with a free converter covering 40+ units.
Read the article →🔄 Unit Converter
How to Use
Pick a category (length, weight, …).
Choose the 'from' and 'to' units.
Enter the value.
Read the result or swap units.
Frequently Asked Questions
More than 40 units across 6 categories: length, weight, area, volume, speed and temperature (Celsius, Fahrenheit, Kelvin).
Yes — conversions use exact official factors (e.g. 1 inch = 2.54 cm) and results are rounded to 6 decimal places.
Yes — choose 'Temperature' as the category and pick any pair of Celsius, Fahrenheit or Kelvin.
Exactly 2.54 cm. Our converter uses this official factor for every inch ↔ cm conversion.
Multiply by 2.2046. For example, 75 kg ≈ 165.3 lbs. Pick kg → lb in our converter.
The Formula
Values are converted through a base unit (e.g. meters, kilograms, liters) using exact official conversion factors.