Etc. Feet is usually written as ft or '. Inches is spelled as in "or." 3'6" would be 3 feet 6 inches, for example.
When writing out distances with feet, use commas to separate the value of each foot. So, if you want to write "3 feet 6 inches", then you should write that as "3, 6" inches. Commas are used to divide up numbers too: "12,345.56" = 1,234,567.00.
Feet and inches are equivalent units, but different systems can be used to measure them. The English system uses 12 inches as a foot and 0.4 inches as an inch. The metric system uses 100 centimeters for a foot and 2.54 centimeters for an inch.
As you can see, there are many ways to express measurement in words. When writing out distances, use commas to separate the value of each foot. For example, if you wanted to write that Tom is three feet six inches tall, you could say that he is 3', 6" tall. Or you could say that he is 33 inches tall. It's your choice! In general, when measuring things, use whole numbers for feet and fractions for inches.
Inches is spelled as in "or." For instance, 3'6" would be 3'6" ". 3 ft 6 in is most commonly written as 42 in or 3.5 ft. In the United States, the usual sign for feet is the apostrophe ('), whereas the quotation is often used for inches " (").
Feet is spelled as in "a foot". For example, "John is five feet tall." = John is 5'7"". Feet are usually measured with a tape measure, so it is important to write them down exactly.
There are 12 inches in a foot, so 123 inches is the same as 1230 feet. If you need to write something like 13 feet, then write "13'". A single quote (') indicates a word division and that you want to write out feet instead of inches. For example, "The movie was three hours long." = The movie was 13". There are 60 minutes in an hour and 30 seconds, so the movie was 300 minutes long.
One inch equals 2.54 centimeters. 1, 2, 3,... feet... inches. That's how you write out feet and inches in numbers.
As a result, a guy six feet two inches tall would be 6'2".
Although the worldwide standard sign for inches is in (see ISO 31-1, Annex A), the inch is usually indicated by a double prime, which is commonly approximated by double quotes, and the foot by a prime, which is often approximated by an apostrophe. Three feet and two inches, for example, can be written as 3' 2".
In English writing, inches are usually written as two decimal places, except when they represent a fraction of a unit of measurement, such as 1/8 inch. When writing fractions of an inch, however, it is customary to use three decimal places instead.
In mathematics and science, inches are usually written with four significant digits. 10 inches = 30.5 centimeters.
Despite the fact that the worldwide standard sign for inches is in (see ISO 31-1, Annex A), the inch is usually represented by a double prime, which is sometimes approximated by double quotes, and the foot by a prime, which is commonly approximated by an apostrophe. Three feet and two inches, for example, can be written as 3' two".
In mathematics and science, a micron is one millionth of a meter or 0.0000254 mm. The symbol for a micron is µ.
The SI unit for length is the meter (m). It is equal to 1/1000 of a yard (yd) or 1/3600 of a rod (rod). The yard is defined as 12 inches (31 cm) longer than a fathom, but this difference does not appear in practice. The rod is defined as 40 yards (37 m) long, but again there is no practical difference between this and the metre. The metre is further divided into 100 centimeters (cm).
There are other units used in science and technology that are based on the meter. For example, the kilo may be thought of as 1000 meters, and the mega as 10 km. There are also giga (109 m) and tera (1012 m).
The millimeter is one thousandth of a metre or 0.039370004 inches. The symbol for a millimeter is mm-.
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