Non- SI unit of length
Mile is non-SI unit which means that mile is non-system unit of measurement. This term is also used to denote factors that do not belong to any system of units of measurement, or that do not belong to the considered system of measurement.
The SI system which we can also call the International System of Units is a standardized system of units approved in 1960 (later modified) by the General Conference of Measures at the XI General Conference of Measures.
SI units are for example: meter, kilogram, second and other ones. Miles are not part of that system.
The mile name comes from Latin – Mille was equal to thousand. Initially, a mile meant 1.000 double steps. Currently mile is a unit of width with a variable value, depending on the region and period.
For example there may be nautical mile = 1.85166 km.
Mile used in USA is equal to 1609.3472 meters. That value is equal to 1.6093472 km. That value we consider as international mile value.
There are few abbreviations for the mile: “mi”, “M”, “ml”, and “m”. The American National Institute of Standards and Technology now uses and recommends “mi” to avoid confusion with the SI metre (m) and millilitre (ml).
How many kilometers (km), meters and yards
1 mile = 1.609344 km
1 mile = 1609.3472 meters
1 mile = 1.760 yards
Other length units
Certain parts of the body were used as the first factors of measurement for length. In ancient Egypt, these were elbows, hands or fingers. One elbow is the distance from the elbow to the tip of the middle finger and it’s equivalent to the range of seven hands, one hand is an equivalent to four fingers. The ancient Romans measured distances with the range of a foot. The shorter sections were measured with the width of the thumb. A component called step was used to measure longer sections. A thousand paces of a Roman soldier was a mile. Textile merchants have established a factor of measurement known as the yard. Pressing the material with the chin, pieces of the material were measured with the distance of the arm outstretched. The yard is the range from the chin to the tip of the toes. Today, the basic SI factor of length is the meter (from the Greek metron or measure). 1 meter equals to the distance traveled in vacuum to light in 1/299792458 seconds.
Length equal- metric and non-metric system
1 km = 1000 m
1 m = 100 cm
1 cm = 0.3937007874 inches
1 yard = 36 inches
1 foot = 12 inches
1 inch = 0.083333333333 ft
1 mile (mi) = 1760 yd
1 mile (mi) = 5280 ft
For more information check 13.1 km to miles.
13 miles in km – miles to kilometers
Thirteen miles to kilometers (km) can be easily converted as we earlier presented basic miles and kilometers conversions. Thirteen miles to kilometers = 13 miles multiple by 1.609344 km.
13 miles = 13 x 1.609344 = 20.921472 km
13 miles = 20.92 km (value rounded up)
13 miles = 823680 inches
13 miles = 68640 ft
13 miles = 22880 yd
13 miles = 20921.472 m
13 miles = 2092147.2 cm
Miles per hour – how many km?
Mile per hour is a speed value equivalent to one international mile per hour. It is used Anglo-Saxon countries.
1 mph = 0.44704 m/s = 1.609344 km/h
100 km/h = (rounded up) 62 mph.