Convert Degrees Minutes Seconds to Decimal Degrees and vice-versa web page

*Units of
Measure & Conversion Factors
Metric System of Linear Measure
*

*Square Measure
Linear
Measure / Long Measure
Surveying
Units of Measure*

*Notes:*

*The Earth curves approximately 8 inches per mile.*

*
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Units of Measure And Conversion Factors

One |
Inches |
Feet |
Yards |
Statute Miles |
Nautical Miles |
mm |

Inch | 1 | 0.0833 | 0.0277 | 25.4 | ||

Foot | 12 | 1 | 0.333 | 304.8 | ||

Yard | 36 | 3 | 1 | 0.00056 | 914.4 | |

Statute Mile | 63,360 | 5,280 | 1,760 | 1 | 0.8684 | |

Nautical Mile | 72,963 | 6,080 | 2,026 | 1.1516 | 1 | |

Millimeter | 0.0394 | 0.0033 | 0.0011 | 1 | ||

Centimeter | 0.3937 | 0.0328 | 0.0109 | 10 | ||

Decimeter | 3.937 | 0.328 | 0.1093 | 100 | ||

Meter | 39.37 | 3.2808 | 1.0936 | 0.0006 | 0.0005 | 1,000 |

Decameter | 393.7 | 32.81 | 10.94 | 0.0062 | 0.0054 | 10,000 |

Hactometer | 3,937 | 328.1 | 109.4 | 0.0621 | 0.0539 | 100,000 |

Kilometer | 39,370 | 3,281 | 1,094 | 0.6214 | 0.5396 | 1,000,000 |

Myriameter | 393,700 | 32,808 | 10,936 | 6.2137 | 5.3959 | 10,000,000 |

Metric System of Linear Measure

1 | millimeter | = | 0.1 | centimeter | = | 0.0393 | inch |

10 | millimeter | = | 1.0 | centimeter | = | 0.3937 | inch |

10 | centimeters | = | 1.0 | decimeter | = | 3.937 | inches |

10 | decimeters | = | 1.0 | meter | = | 39.37 | inches |

10 | meters | = | 1.0 | decameter | = | 32.81 | feet |

10 | decameters | = | 1.0 | hectometer | = | 328.1 | feet |

10 | hectameters | = | 1.0 | kilometer | = | 0.62 | mile |

10 | kilometers | = | 1.0 | myriameter | = | 6.21 | miles |

1 | Mile | = | 80 | Chains |

= | 320 | Rods | ||

= | 5,280 | Feet | ||

1 | Chain | = | 4 | Rods |

66 | Feet | |||

100 | Links | |||

1 | Rod | = | 5 1/2 | Yards |

16 1/2 | Feet | |||

25 | Links | |||

1 | Link | = | 0.66 | Feet |

7 7/8 | Inches | |||

1 | Pole | = | 16 1/2 | Feet |

1 | Sq Mile | = | 640 | Acres | |||

1 | Acre | = | 10 | Sq Chains | |||

160 | Sq Rods | ||||||

43,560 | Sq Feet | ||||||

1 | Sq Rod | = | 30 1/4 | Sq Yards | |||

272 1/4 | Sq Feet | ||||||

1 | Sq Foot | = | 144 | Sq Inches | |||

1 | Furlong | = | 220 | Yards | = | 1/8 | Mile |

**Acre** - The (English) acre is a
unit of area equal to 43,560 square feet, or 10 square chains, or 160 square
poles. It derives from a plowing area that is 4 poles wide and a furlong (40
poles) long. A square mile is 640 acres. The Scottish acre is 1.27 English
acres. The Irish acre is 1.6 English acres.

**Arpent** - Unit of length and area
used in France, Louisiana, and Canada. As a unit of length, approximately 191.8
feet (180 old French 'pied', or foot). The (square) arpent is a unit of area,
approximately .845 acres, or 36,802 square feet.

**Chain** - Unit of length usually
understood to be *Gunter's chain*, but possibly variant by locale. See also
*Rathbone's chain*. The name comes from the heavy metal chain of 100 links
that was used by surveyors to measure property bounds.

**Colpa** - Old Irish measure of land
equal to that which can support a horse or cow for a year. Approximately an
Irish acre of good land.

**Compass** - One *toise*.

**Engineer's Chain** - A 100 foot *
chain* containing 100 links of one foot apiece.

**Furlong** - Unit of length equal to
40 poles (220 yards). Its name derives from "furrow long", the length of a
furrow that oxen can plow before they are rested and turned. See *Gunter's
chain*.

**Ground** - A unit of area equal to
2400 sq. ft., or 220 sq. meters, used in India.

**Gunter's Chain** - Unit of length
equal to 66 feet, or 4 poles. Developed by English polymath Edmund Gunter early
in the 1600's, the standard measuring chain revolutionized surveying. Gunter's
chain was 22 yards long, one tenth of a *furlong*, a common unit of length
in the old days. An area one chain wide by ten chains long was exactly an acre.
In 1595 Queen Elizabeth I had the mile redefined from the old Roman value of
5000 feet to 5280 feet in order for it to be an even number of furlongs. A mile
is 80 chains.

**Hectare** - Metric unit of area
equal to 10,000 square meters, or 2.471 acres, or 107,639 square feet.

**Hide** - A very old English unit of
area, a hide was of variable size depending on locale and the quality of the
land. It was the amount of land to support a family, and ranged from 60 to 180
acres. After the Norman conquest in 1066 it became standardized at around 120
acres.

**Hundred** - An adminstrative area
larger than a village and smaller than a county. In England it was 100 *hides*
in size, and the term was used for early settlements in Virginia, Maryland, and
Delaware.

**Labor** - The labor is a unit of
area used in Mexico and Texas. In Texas it equals 177.14 acres (or 1 million
square varas).

**League (legua)** - Unit of area
used in the southwest U.S., equal to 25 labors, or 4428 acres (Texas), or 4439
acres (California). Also, a unit of length-- approximately three miles.

**Link** - Unit of length equal to
1/100 chain (7.92 inches).

**Morgen** - Unit of area equal to
about .6309 acres. It was used in Germany, Holland and South Africa, and was
derived from the German word Morgen ("morning"). It represented the amount of
land that could be plowed in a morning.

**Out** - An 'out' was ten chains.
When counting out long lines, the chain carriers would put a stake at the end of
a chain, move the chain and put a stake at the end, and so on until they ran
"out" of ten stakes.

**Perch** - See *pole* .

**Point** - A point of the compass.
There are four cardinal points (North, South, East, West), and 28 others
yielding 32 points of 11.25 degrees each. A survey line's direction could be
described as a compass point, as in "NNE" (north northeast). To improve
precision, the points would be further subdivided into halves or quarters as
necessary, for example, "NE by North, one quarter point North". In some areas,
"and by" meant one half point, as in "NE and by North".

**Pole** - Unit of length and area.
Also known as a *perch* or *rod*. As a unit of length, equal to 16.5
feet. A mile is 320 poles. As a unit of area, equal to a square with sides one
pole long. An acre is 160 square poles. It was common to see an area referred to
as "87 acres, 112 poles", meaning 87 and 112/160 acres.

**Pueblo** - A Spanish grant of less
than 1000 acres.

**Rancho** - A Spanish grant of more
than 1000 acres.

**Rathbone's Chain** - A measuring *
chain* two poles, or 33 feet, in length.

**Rod** - See *pole*

**Rood** - Unit of area usually equal
to 1/4 acre.

**Toise** - Traditional French unit
of length equal to 6 old French 'pieds' or feet, or 6.4 English feet.

**Vara** - Unit of length (the *
"Spanish yard"*) used in the U.S. southwest. The vara is used throughout the
Spanish speaking world and has values around 33 inches, depending on locale. The
legal value in Texas was set to 33 1/3 inches early in the 1900's.

**Virgate** - An old English unit of
area, equal to one quarter of a *hide*. The amount of land needed to
support a person.