Quick, free online calculators and converters for everyday math and unit conversions. Professional tools that are fast, accurate, and easy to use - no registration required.
A unit is a measurement of a quantity that is defined or adopted by tradition or law. Other quantities can be expressed as a multiple of the unit. The intent of this site is to provide a convenient means to convert between the various units of measurement within different systems, as well as to provide calculators for everyday math problems.