Some other
associated conversions 
1 kilometre ( km ) = 1000 metre , 1 metre = 100 cm , 1 cm = 10
mm
1 mile = 5280 feet , 1 yard ( yd ) = 3 feet , 1 fathom = 6 feet
, 1 chain = 66 feet
1 foot (ft.) = 12 inches (in.)
To convert
decimal fractions of an inch to fractions of an inch.
Take the
decimal fraction of feet and divide by 0.08333 (1/12th) and this
will give you inches and decimals of an inch.
For example  6.37 feet. Take the 0.37 feet and divide by 0.0833
= 4.44 inches
so for 6.37 ft. we can also say 6 ft. 4.44 in.
Now take the 0.44 in. and round it down to 0.4 which is ^{4}/_{10}"
We can now say 6.37' approximatly equals 6'  4
^{4}/_{10}"
For fractions of an inch other than tenths, take the decimal remainder
of inches and divide by:
0.125 for the number of eighths
0.0625 for the number of sixteenths
0.03125 for the number of thirtyseconds
0.015625 for the number of sixtyfourths, and so on.
For example  4.382 inches. For eighths, divide the remainder,
0.382 by 0.125 and the answer is 3.056 so the fraction is a bit
over 3 eighths, therefore the answer ends up as approx. 4 ^{3}/_{8}"
1 millimetre
is about one twentyfifth of an inch ( 1 in. = 25.4 mm )
Feet may
be shown as ft. or ' and inches as in. or "
