Unit Converter

How the conversions work

Every unit in a category is defined against one base unit — meters for length, kilograms for mass, pascals for pressure and so on. A value is first converted to that base unit, then divided by the factor of the target unit. This two-step approach keeps results consistent no matter which pair of units you pick.

Temperature is different

Temperature scales have different zero points, so they use formulas rather than factors: °F = °C × 9/5 + 32 and K = °C + 273.15. 100 °C converts to 212 °F and 373.15 K.

Useful reference values

• 1 kilometer = 0.621371 miles; 1 mile = 1.609344 kilometers
• 1 meter = 3.28084 feet; 1 foot = 0.3048 meters exactly
• 1 kilogram = 2.204623 pounds; 1 pound = 0.45359237 kg exactly
• 1 liter = 0.264172 US gallons; 1 US gallon = 3.785411784 liters
• 1 GB = 1000 MB (decimal) while 1 GiB = 1024 MiB (binary)

Decimal versus binary storage

Drive manufacturers use decimal units (1 MB = 1,000,000 bytes) while operating systems often report binary units (1 MiB = 1,048,576 bytes). Both are listed separately so you can convert between the two without guessing.