Convert length, weight, temperature, volume, and data size — using exact conversion factors, instantly.
This converter uses exact, standards-based conversion factors — 1 inch = 2.54 cm exactly, 1 pound = 453.592 grams, 1 mile = 1.60934 km — rather than rounded approximations. Temperature uses proper formulas (°F = °C × 9/5 + 32) since Celsius and Fahrenheit don't share a common zero point.
Data size uses the binary standard (1 KB = 1,024 bytes), matching how Windows, macOS, and Linux report file and storage sizes — which is why it can differ from the decimal units (1,000-based) that hard drive manufacturers use on packaging.
The metric system (meters, grams, liters) is used almost universally and scales in multiples of 10. The imperial/US customary system (feet, pounds, gallons) is still used daily in the United States. This tool converts freely between both.
Storage manufacturers use decimal units (1 TB = 1,000,000,000,000 bytes), while operating systems like Windows and macOS display storage using binary units (1 TB = 1,099,511,627,776 bytes). This tool uses the binary standard, matching what your OS shows.
Unlike other units, temperature scales don't share a common zero point, so conversion uses formulas rather than simple multiplication: °F = (°C × 9/5) + 32, and Kelvin = °C + 273.15.
A US gallon (3.785 liters) and a UK imperial gallon (4.546 liters) are different sizes — a historical difference between the two measurement systems. This tool uses US gallons, cups, and pints, which is the more common standard globally online.
No. All conversions are calculated directly in your browser using JavaScript — nothing is sent to a server.