About the Unit Converter
Unit conversion comes up constantly in cooking, travel, home improvement, fitness tracking, and international communication, especially between countries using metric versus imperial (US customary) systems.
This tool covers the most commonly searched conversions across four categories — length, weight, volume, and temperature — using standardized international conversion factors, so results stay consistent with scientific and engineering references.
Frequently Asked Questions
Why does the US still use imperial units?
The United States is one of the few countries that never fully adopted the metric system for everyday use, largely due to the cost and disruption of converting existing infrastructure, tools, and standards after the metric system's introduction elsewhere.
Is a US gallon the same as a UK (imperial) gallon?
No — a US gallon (3.785 liters) is smaller than a UK imperial gallon (4.546 liters). This calculator uses US customary volume units.
How is Celsius to Fahrenheit conversion calculated?
The formula is °F = (°C × 9/5) + 32. It's not a simple linear multiplier because the two scales have different zero points and degree sizes.