Earth measurements are used as the standard units of measure used in the United Federation of Planets.
Length
Meter
A meter (m) is the fundamental SI unit of length, defined as the distance traveled by light in a vacuum in 1/299,792,458 second.
In the Imperial units system 1 foot ≡ 0.3048 m.
centimeter
A centimeter (cm) is an SI unit of length equal to 1/100 of a meter.
1 cm ≈ 0.39370 inches.
- See also: Centimeter at Wikipedia
kilometer
A kilometer (km) is an SI unit of length equal to one thousand meters.
1 km ≈ 0.62137 miles.
millimeter
A millimeter (mm) is an SI unit of length equal to 1/1,000 of a meter.
1 mm ≈ 0.03937 inches.
- See also: Millimeter at Wikipedia
Micron
A micron is another name for micrometer (µm), an SI unit of length equal to 1 millionth of a meter (1
×10−6 m).1 mil ≡ 25.4 μm.
- See also: Micrometer at Wikipedia
Mile
A mile (mi) was originally one thousand paces, or 5,000 Roman feet (~4,850 Imperial feet). A later British reform changed the mile to 5,280 Imperial feet so that it would equal eight furlongs.
1 mi ≡ 1.609344 km.
Nautical Mile
A nautical mile was based on the length of one minute of arc of a great circle.
1 nautical mile = 1852 m (6076.12 ft)
- See also: Nautical mile at Wikipedia
Foot
A foot (ft, plural feet) is an Imperial unit of length equal to twelve inches, or one third of a yard.
1 ft ≡ 0.3048 m.
Inch
An inch (in) was originally based on the width of the average man's thumb, or the length of three barleycorns. It was later redefined based on SI units.
1 in ≡ 2.54 cm.
Light year
(Main Article: Light year)
One light year is the distance that light travels in one Earth year. It is approximately equal to 9.46
×1015 meters, or 5.88 ×1012 miles.Mass
Kilogram
A kilogram (kg) is the fundamental SI unit of mass.
In the Imperial units system 1 pound ≡ 0.45359237 kg.
Gram
A gram (g) is an SI unit of mass equal to 1/1,000 of a kilogram.
1 ounce ≡ 28.349523 g.
Milligram
A milligram (mg) is an SI unit of mass equal to 1/1,000 of a gram.
Time
See: Time measurements
Volume
Liter
A liter (L or l) is a derived SI unit of volume, equal to 1/1,000 cubic meters (1 cubic decimeter).
In the Imperial units system 1 gallon ≡ 4.54609 L (~277.42 cubic inches).
In the US system, 1 gallon ≡ 231 cubic inches ≡ 3.785411784 l.
milliliter
A milliliter (ml) is an SI unit of volume equal to 1/1,000 of a liter.
In the Imperial system 1 fluid ounce ≡ 28.4130625 ml.
In the US system, 1 fluid ounce ≡ 29.5735295625 ml.
- See also: Milliliter at Wikipedia
cc
A cc (cubic centimeter, official cm3) is a measure of volume equal to one cubic centimeter (cm), which is also equal to one milliliter (ml). The cc is a common term for milliliter used in measuring the dosage of liquid medicines by volume.
1 cubic inch ≡ 16.387964 ml ≡ 16.387964 cc.
cubic meter
During a sensor sweep of the Neutral zone, the USS Enterprise-E found 25 particles of dust per cubic meter. (Star Trek: First Contact)
Units
Gross
A gross is equal to a dozen dozen.