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2. Conversion of units - Wikipedia

   en.wikipedia.org/wiki/Conversion_of_units

   Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.

3. List of conversion factors - Wikipedia

   en.wikipedia.org/wiki/List_of_conversion_factors

   Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).

4. International System of Units - Wikipedia

   en.wikipedia.org/wiki/International_System_of_Units

   The conversion between different SI units for one and the same physical quantity is always through a power of ten. This is why the SI (and metric systems more generally) are called decimal systems of measurement units. [10] The grouping formed by a prefix symbol attached to a unit symbol (e.g. ' km ', ' cm ') constitutes a new inseparable unit ...

5. System of units of measurement - Wikipedia

   en.wikipedia.org/wiki/System_of_units_of_measurement

   [3] The current international standard for the metric system is the International System of Units (Système international d'unités or SI). It is a system in which all units can be expressed in terms of seven units. The units that serve as the SI base units are the metre, kilogram, second, ampere, kelvin, mole, and candela.

6. Help:Convert units - Wikipedia

   en.wikipedia.org/wiki/Help:Convert_units

   Metric prefixes; Text Symbol Factor or; yotta Y 10 24: 1 000 000 000 000 000 000 000 000: zetta Z 10 21: 1 000 000 000 000 000 000 000: exa E 10 18: 1 000 000 000 000 000 000: peta P 10 15: 1 000 000 000 000 000: tera T

7. Angstrom - Wikipedia

   en.wikipedia.org/wiki/Angstrom

   This definition was endorsed at the 7th General Conference on Weights and Measures (CGPM) in 1927, [citation needed] but the material definition of the metre was retained until 1960. [21] From 1927 to 1960, the angstrom remained a secondary unit of length for use in spectroscopy, defined separately from the metre.

8. Natural units - Wikipedia

   en.wikipedia.org/wiki/Natural_units

   In physics, natural unit systems are measurement systems for which selected physical constants have been set to 1 through nondimensionalization of physical units.For example, the speed of light c may be set to 1, and it may then be omitted, equating mass and energy directly E = m rather than using c as a conversion factor in the typical mass–energy equivalence equation E = mc 2.

9. Geometrized unit system - Wikipedia

   en.wikipedia.org/wiki/Geometrized_unit_system

   Listed below are all conversion factors that are useful to convert between all combinations of the SI base units, and if not possible, between them and their unique elements, because ampere is a dimensionless ratio of two lengths such as [C/s], and candela (1/683 [W/sr]) is a dimensionless ratio of two dimensionless ratios such as ratio of two volumes [kg⋅m 2 /s 3] = [W] and ratio of two ...