Whois & Analysis for metric-conversions.org

The metric system is an internationally agreed decimal system of measurement.

It was originally based on the and the introduced by the French First Republic in 1799, but over the years the definitions of the metre and the kilogram have been refined, and the metric system has been extended to incorporate many more units.

Although a number of variants of the metric system emerged in the late nineteenth and early twentieth centuries, the term is now often used as a synonym for "SI" or the "International System of Units"—the official system of measurement in almost every country in the world.

In geometric measurements, length is the most extended dimension of an object.

In the International System of Quantities, length is any quantity with dimension distance.

In other contexts "length" is the measured dimension of an object.

For example, it is possible to cut a length of a wire which is shorter than wire .

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.

Conversion of units is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors.

In science and engineering, the weight of an object is usually taken to be the force on the object due to gravity.

Weight is a vector whose magnitude (a scalar quantity), often denoted by an italic letter W, is the product of the mass m of the object and the magnitude of the local gravitational acceleration g; thus:.

The unit of measurement for weight is that of force, which in the International System of Units (SI) is the newton.

For example, an object with a mass of one kilogram has a weight of about 9.8 newtons on the surface of the Earth, and about one-sixth as much on the Moon.

In this sense of weight, a body can be weightless only if it is far away (in principle infinitely far away) from any other mass.

Although weight and mass are scientifically distinct quantities, the terms are often confused with each other in everyday use (i.e. comparing and converting force weight in pounds to mass in kilograms and vice versa).