[USMA:40528] usage of measures for body mass and height

[Ron Stone]

- - - general info about metric measures for body mass and height - - -





MASS












The exact conversion factors can also be applied as needed:






Sources:

'http://physics.nist.gov/Pubs/SP811/appenB8.html'

As the usage of customary or pre-metric units for body mass and height still appear to displace the usage of metric units for these everyday measures, I thought about gathering some 'food for thought'. \\ - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - Metric units are practical and suitable for everyday measures of body mass (weight) and height. For those who are used to measures of body mass in terms of pounds, it's really not difficult to use the kilogram as a measure. For practical reference it's easy to remember that 1 liter of water has a mass of 1 kilogram. It's also easy to remember that 1 kg (kilogram) is equivalent to 1000 g (gram), and that 1 g is equivalent to 1000 mg (milligram). As nutrition information labels in the United States are labeled with g and mg units, consumers can relate metric measures of nutrition information to body mass more practicably than with customary or pre- metric units. A number of electronic mass scales that are commercially available in North America can also be configured to display kilogram (in addition to pound) units. To convert from pound (avoirdupois, or US)(lb) to kilogram (kg), multiply by 0.45359237 *. To convert from kilogram (kg) to pound (avoirdupois, or US)(lb), multiply by 2.20462262184878 *. *"The exact conversion factor is 4.535 923 7 E-01. All units in Sec. B. 8 and Sec. B.9 that contain the pound refer to the avoirdupois pound." 'http://physics.nist.gov/Pubs/SP811/footnotes.html#f23'

HEIGHT









An exact conversion factor can also be applied as needed:

To convert from inch (in) to millimeter (mm), multiply by 25.4 **.

** 'http://physics.nist.gov/Pubs/SP811/appenB8.html'






Cheers,

Ron



Ron Stone

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For practical reference, it's easy to remember that 1 m (meter) is equivalent to 1000 mm (millimeter). As a result, one can practicably express height in terms of either meter or millimeter. A height of 5 ft 10 in (as expressed in customary foot and inch units) (or 5' 10'' as expressed in a shorthand notation) can be easily expressed with metric units: 1.778 m ( or 1778 mm) can probably be rounded to 1.78 m for practical everday use. It may also bear mention that calculations involving height are oftentimes less fussy with metric units than they are with the customary foot, inch, and inch-fractions. To determine calculations involving a height of 5 ft 10, one might first figure the expression in terms of inches (70), or to figure the expression in terms of feet (either 10 inches more than 5 feet, or as 2 inches less than 6 feet). Figuring 5 ft 10 in terms of decimal feet involves converting the 10 inches to 0.833_ foot. - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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