# Earth measurements

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**Earth measurements** were the standard units of measure used in the United Federation of Planets.

*It is possible that the UFP did not actually use Earth measurements, but that their usage on screen is an example of "implicit translation" (such as the characters in the film*K-19: The Widowmaker

*speaking English when the viewer understands that they are "speaking" Russian.) This is implied by scenes such as the one where Kirk remarks to Abraham Lincoln that the*Enterprise

*could convert to minutes.*(TOS: "The Savage Curtain")

## Length Edit

### MeterEdit

A **meter** (**m**) was 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.

#### MillimeterEdit

A **millimeter** (**mm**) was an SI unit of length equal to 1/1,000 of a meter.

1 mm ≈ 0.03937 inches.

**See also:**Millimeter at Wikipedia

#### CentimeterEdit

A **centimeter** (**cm**) was an SI unit of length equal to 1/100 of a meter.

1 cm ≈ 0.39370 inches.

**See also:**Centimeter at Wikipedia

#### KilometerEdit

A **kilometer** (**km**) was an SI unit of length equal to one thousand meters.

1 km ≈ 0.62137 miles.

### Micron Edit

A **micron** was 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 Edit

(*Main article: 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 Edit

A **nautical mile** was based on the length of one minute of arc of a great circle.

1 nautical mile ≡ 1,852 m (∼6,076.12 ft)

**See also:**Nautical mile at Wikipedia

### FootEdit

A **foot** (**ft**, plural **feet**) was an Imperial unit of length equal to twelve inches, or one third of a yard.

1 ft ≡ 0.3048 m.

### Inch Edit

An **inch** (**in**) was originally based on the width of the average man's thumb, or the length of three barley-corns. It was later redefined based on SI units.

1 in ≡ 2.54 cm.

### Light year Edit

(*Main article: Light year*)

One light year was the distance that light traveled in one Earth year. It was approximately equal to 9.46^{15} meters, or 5.88 ×10^{12} miles.

## Mass Edit

### Kilogram Edit

A **kilogram** (**kg**) was the fundamental SI unit of mass.

In the Imperial units system, 1 pound ≡ 0.45359237 kg.

#### Gram Edit

A **gram** (**g**) was an SI unit of mass equal to 1/1,000 of a kilogram.

1 ounce ≡ 28.349523125 g.

#### Milligram Edit

A **milligram** (**mg**) was an SI unit of mass equal to 1/1,000 of a gram.

## Time Edit

See: Time measurements

## Volume Edit

### Liter Edit

A **liter** (**L** or **l**) was 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 Edit

A **milliliter** (**ml**) was 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 Edit

A **cc** (**cubic centimeter**, official **cm ^{3}**) was a measure of volume equal to one cubic centimeter (cm

^{3}), which was also equal to one milliliter (ml). The cc was a common term for milliliters used in measuring the dosage of liquid medicines by volume.

1 cubic inch ≡ 16.387064 ml ≡ 16.387064 cc.

**See also:**cc at Wikipedia**See also:**Drug dosage

### Cubic meter Edit

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 Edit

### Gross Edit

A **gross** was equal to a dozen dozen.