### Convert Spans to:

- Spans to
**Angstroms**- 1 Ångström is equal to 0.1 nanometers. Expressed in the SI base unit meters 1 Ångström is equal to 1 x 10
^{-10}meters. 1 Å = 0.0000000001 m.

- 1 Ångström is equal to 0.1 nanometers. Expressed in the SI base unit meters 1 Ångström is equal to 1 x 10
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**Arpents**- 1 Arpent (as a length) contains 180 feet (French measure) and 1 Foot (French measure) = 12.789 inches according to Canadian Weights and Measures Act (R.S.C., 1985, c. W-6). 1 Arpent = 180 ft (French measure) = 58.471308 meters.

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**Cable Lengths (Imperial)**- 608 ft

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**Cable Lengths (International)**- 1/10 nmi

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**Cable Lengths (U.S.)**- 720 ft

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**Centimeters**- 1/100
^{th}of a meter. The prefix centi indicates 1/100^{th}of the base unit.

- 1/100
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**Chains**- 66 ft = 4 rods

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**Cubits**- Distance from fingers to elbow, estimated at 18 inches for a Biblical cubit, other cubits may vary. 1 Cubit = 45.72 centimeters = 0.4572 meters.

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**Decameters**- 1 Decameter is equal to exactly 10 meters.

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**Decimeters**- 1 Decimeter is equal to exactly 0.1 meters (10 centimeters).

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**Ells**- 45 in

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**Fathoms**- Unit of length measuring exactly 6 feet or 2 yards (international foot of 0.3048 meters). Primarily used to measure water depths. In SI units 1 fathom is exactly 1.8288 meters. 1 fm = 1.8288 m.

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**Feet**- International survey foot defined as exactly 0.3048 meters by convention in 1959. This is the most common modern foot measure. US Survey may also be used but are nearly identical for short distances. 1 ft = 0.3048 m.

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**Feet (French measure)**- 1 Foot (French measure or Paris foot) = 12.789 inches according to Canadian Weights and Measures Act (R.S.C., 1985, c. W-6). Assuming 25.4 millimeters per inch as per international agreement. 1 ft (French measure) = 0.3248406 m.

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**Feet (U.S. Survey)**- Exactly 1200/3937 meters by definition. In decimal terms approximately 0.304 800 609 601 219 meters. Variation from the common international foot of exactly 0.3048 meters may only be considerable over large survey distances. 1 ft (US survey) = 1200/3937 m

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**Fingers**- 1 finger is exactly 7/8 inches. Using SI units 1 finger is 0.022225 meters.

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**Fingers (cloth)**- 1 finger (cloth) is exactly 4 1/2 inches. Using SI units 1 finger (cloth) is 0.1143 meters.

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**French**- 1 french is exactly 1/3 millimeters. In SI units 1 french is 3.333... x 10
^{-4}meters.

- 1 french is exactly 1/3 millimeters. In SI units 1 french is 3.333... x 10
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**Furlongs**- 10 Chains = 660 ft = 220 yd

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**Gigameters**- 1 Gigameter is equal to 1 000 000 000 meters (SI unit).

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**Hands**- Approximates the breadth of an adult human hand. Standardized to exactly 4 inches. Used to measure the height of horses. 1 hand is exactly 101.6 millimeters or 0.1016 meters (SI base unit). 1 h = 0.1016 m.

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**Inches**- 1/36 yd = 1/12 ft

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**Kilofeet**- 1 Kilofoot is equal to 1000 feet. There are 304.8 meters (SI base unit) in a kilofoot using the standard international foot of exactly 0.3048 meters. 1 kft = 304.8 meters.

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**Kilometers**- 1 Kilometer is equal to 1000 meters. Meters is the SI base unit of length. The prefix
*kilo*, abbreviated "k", indicates one thousand. 1 km = 1000 m.

- 1 Kilometer is equal to 1000 meters. Meters is the SI base unit of length. The prefix
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**Leagues**- 4 000 meters. A general or metric league of 4 kilometers. Leagues based on the mile are typically smaller at 3 miles, however there are many variations. Used by Jules Verne in 20 000 Leagues Under the Sea. 1 League (metric) = 4 000 meters (SI unit).

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**Leagues (land)**- 1 league (land) is exactly 3 US Statute miles. In SI units 1 league is 4828.032 meters.

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**Light Days**- 1 Light day is 2.590 206 837 12 x 10
^{13}meters (SI unit). Distance light travels in a vacuum in one day.

- 1 Light day is 2.590 206 837 12 x 10
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**Light Hours**- 1 Light hour is 1.079 252 8488 x 10
^{12}meters (SI unit). Distance light travels in a vacuum in one hour.

- 1 Light hour is 1.079 252 8488 x 10
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**Light Minutes**- 1 Light minute is 1.798 754 748 x 10
^{10}meters (SI unit). Distance light travels in a vacuum in one minute.

- 1 Light minute is 1.798 754 748 x 10
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**Light Seconds**- 1 Light second is equal to 299 792 458 meters (SI unit). Distance light travels in a vacuum in one second.

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**Light Years**- 1 Light year is 9.460 730 472 5808 x 10
^{15}meters (SI unit). Distance light can travel in a vacuum over a period of 365.25 days.

- 1 Light year is 9.460 730 472 5808 x 10
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**Line**- 1 lines is exactly 1/12 inches. In SI units 1 line is 0.00211666... meters.

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**Links (Gunter's Surveyor's)**- One hundredth (1/100) of a chain (Gunter's, Surveyor's). A chain having 66 ft or 4 rods. A link being approximately 0.201168 meters (SI base unit). 1 lnk ? 0.201168 m.

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**Marathons**- According to International Association of Athletics Federations rule 240 the standard distance of a marathon is 42.195 Kilometers (km). Exactly 42,195 meters (m) (SI unit).

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**Megameters**- 1 Megameter is equal to 1 000 000 meters (SI unit).

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**Meters**- Distance light travels in 1/299 792 458 of a second in vacuum.

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**Metric Feet**- 1 Metric foot is exactly 30 centimeters. The nearest approximation to an international foot made with a whole number of centimeters. About 11.8 inches. 1 Metric foot = 0.3 meters.

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**Metric Inches**- 1 Metric inch is exactly one-twelfth (1/12) of a metric foot = 2.5 centimeters = 25 millimeters = 0.025 meters (SI base unit). 1 Metric inch = 0.025 m.

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**Metric Miles**- 1609.344 Meters (SI base unit). An approximation of a statute mile in a round figure of meters. 1 Metric mile = 1609.344 m.

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**Mickeys**- 1 mickey is exactly 1/200 inches. In SI units 1 mickey is 1.27 x 10
^{-4}meters.

- 1 mickey is exactly 1/200 inches. In SI units 1 mickey is 1.27 x 10
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**Microinches**- 1 Microinch is one millionth of an inch. It is equivalent to 0.0254 micrometers. It is 0.0000000254 meters (SI base unit). 1µin = 0.0000000254 m.

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**Micrometers**- 1 Micrometer is exactly 1 x 10
^{-6}meters.

- 1 Micrometer is exactly 1 x 10
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**Microns**- 1 micro is exactly 1 x 10
^{-6}meters. Meters are SI units.

- 1 micro is exactly 1 x 10
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**Mil**- 1 mil is exactly 1 x 10
^{-3}inches. In SI units 1 mil is 2.54 x 10^{-5}meters.

- 1 mil is exactly 1 x 10
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**Miles**- 1 Mile is exactly 1.609344 kilometres by international agreement in 1959. In SI units it is exactly 1609.344 meters. The length is based originally on the distance marched in 1000 paces of two steps each. 1mi = 1.609344 km = 80 chains = 5280 ft = 1760 yd.

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**Millimeters**- 1/1000
^{th}of a meter. The prefix milli indicates 1/1000^{th}of the base unit.

- 1/1000
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**Myriameters**- 1 Myriameter is equal to 10 kilometers. In the SI base unit meters one myriameter is equal to ten thousand meters. Historically used in distance marking, especially on train routes. 1 Myriameter = 10000 meters.

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**Nails (cloth)**- 1 nail (cloth) is exactly 2 1/4 inches. In SI units 1 nail (cloth) is 0.05715 meters.

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**Nanometers**- 1 Nanometer is exactly 1 x 10
^{-9}meters.

- 1 Nanometer is exactly 1 x 10
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**Nautical Leagues**- 1 nautical league is exactly 3 nautical miles. In SI units 1 nautical league is 5556 meters.

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**Nautical Miles (International)**- 1852 m

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**Paces**- 2.5 ft

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**Palms**- 1 palm is exactly 3 inches. In SI units 1 palm is 0.0762 meters.

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**Parsecs**- 1 Parsec is approximately 3.085 677 82 x 10
^{16}±6 x 10^{6}meters (SI unit). Approximately 3.26 light years. Distance from the Sun to an astronomical object with a parallax angle of one arcsecond.

- 1 Parsec is approximately 3.085 677 82 x 10
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**Perch**- 1 Perch (as a length) contains 18 feet (French measure) and 1 Foot (French measure) = 12.789 inches according to Canadian Weights and Measures Act (R.S.C., 1985, c. W-6). 1 Perch = 5.8471308 meters.

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**Picas**- 1 pica is exactly 12 points. In SI units the size of a pica depends on how large a point is. A PostScript point is 1/72 inches, so 1 PostScript pica would be about 0.0042333 meters.

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**Picometers**- A picometer is a trillionth of a meter. Often represented as 1 x 10
^{-12}meters or fully as 0.000,000,000,001 meters.

- A picometer is a trillionth of a meter. Often represented as 1 x 10
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**Points (PostScript)**- 1 point (PostScript) is exactly 1/72 inches. In SI units 1 point (PostScript) is 0.000352777... meters.

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**Quarters**- 1 quarter is exactly 1/4 of a yard. In SI units 1 quarter is 0.2286 meters.

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**Rods**- 16-1/2 ft

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**Ropes**- 20 ft

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**Shaku**- Shaku was standardized to exactly 10/33 meters (SI base unit). Originally based on the length of the forearm this unit may also be referred to as a Japanese foot. 1 Shaku ? 11.93 in ? 0.9942 ft ? 0.30303 m.

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**Smoots**- A Smoot is a non-standard unit of measure based on a 1958 MIT prank. In SI units 1 Smoot is equal to 1.70180 meters, the length of Oliver R. Smoot in 1958 when he lay repeatedly end to end to measure the length of the Harvard bridge.

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**Steps**- The distance covered by a single step assuming a stride length of 0.762 meters or 2.5 feet. Although stride length will vary by person and activity this may be useful in estimating distance traveled from the reading on a pedometer.

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**Terameters**- 1 Terameter is equal to 1 000 000 000 000 meters (SI unit).

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**Twips**- 1 Twip is exactly one twentieth (1/20) of a PostScript point. A PostScript point itself being 1/72 of an inch, making a twip 1/1440 inch. 1 Twip is approximately 1.763889 x 10
^{-5}meters (SI base unit). 1 twp ? 0.000017638888888889 m.

- 1 Twip is exactly one twentieth (1/20) of a PostScript point. A PostScript point itself being 1/72 of an inch, making a twip 1/1440 inch. 1 Twip is approximately 1.763889 x 10
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**Yards**- Imperial/US length of 3 feet or 36 inches. In 1959 defined in terms of metric units as exactly 0.9144 meters. 1 international yard is exactly 0.9144 meters (SI base unit of length). 1 yd = 0.9144 m.