Units of measurement

Units of measurement give standards so that the numbers from our measurements refer to the same thing. Measurement is a process that uses numbers to describe...

U.S. customary units is the main system of units of measurement used to measure things in the United States and U.S. territories (except in Puerto Rico...

Measuring something puts the amount of the thing into numbers. Measurement can be written using many different units. For example, if we want to compare...

International d'unités. The International System of Units is a system of measurement based on 7 base units: the metre (length), kilogram (mass), second (time)...

A system of units is a collection of units of measurement. The quantities described by the units are related to each other by specific rules. These rules...

The foot is a unit for measuring length. It is one of the Imperial units and US customary units. The shortest way of writing the unit "foot" is by the...

is a unit of measurement. It measures radioactivity. It is defined as 1 Ci = 3.7×1010 decays per second. This is roughly the activity of 1 gram of the...

The Planck units are physical units of measurement. The system of these units was first developed by Max Planck. The four basic Planck units are based...

Archived 2010-06-18 at the Wayback Machine How Many? A Dictionary of Units of Measurement Archived 2006-12-14 at the Wayback Machine How to make a Gunter's...

are the closely related United States customary units and British imperial units. A system of measurement that describes economic systems is called an econometric...

A base unit is a unit of measurement that is not derived from others. An example is the metre in the metric system. SI base unit This short article can...

unit (abbreviated: amu, u, or Da) is a unit of measurement that is used to measure the mass of atoms. The atomic mass unit is equal to one twelfth of...

stronger magnetic field "Medical Daily: First measurement of magnetic field in Earth's core". First measurement of magnetic field in Earth's core. Medical Daily...

unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air...

unit of length. It was the distance a person could walk in about one hour. The Romans adopted the league and it became a common unit of measurement throughout...

variant of the metric system. The derived units are on the centimeter as the unit of length, the gram as a unit of mass and the second as a unit of time...

per second squared (or m/s2 or metre per second per second) is a unit of measurement for acceleration. If an object accelerates at 1 m/s2, it means that...

A hogshead is a measurement unit in the imperial system. It was derived in the 14th century by weighing King Henry IV's hog's head.[source?] The measure...

A SI derived unit is a unit of measurement that can be expressed as a combination of one or more SI base units, or that has no dimension. There are special...

A fluid ounce is a unit of volume in both the imperial system of units and the U.S. customary units system. However, the two measures are not quite the...