Page 303 - Mechanical Engineer's Data Handbook

GENERAL DATA 29 1

0. I .3 Abbreviations for units

Unit Abb. Unit Abb. Unit Abb. Unit Abb.
metre m steradian sr newton N mole mol
angstrom A radian per rads-' bar bar watt W
square metre m2 second millibar mb decibel dB
cubic metre m3 hertz Hz standard atm kelvin K
litre 1 revolution per rev. min- atmosphere centigrade "C
second S minute millimetre of mm Hg coulomb C
minute min kilogramme kg mercury ampere A
hour h gramme g poise P volt V
lumen lm tonne t stokes s, St ohm R
candela cd (= 1 Mg) joule J farad F
lux IX seimen S kilowatt hour kW-h henry H
day d atomic mass U electron volt eV weber Wb
year a unit calorie cal tesla T
radian rad Dascal Pa

0. I .4 Multiples and submultiples Tsi = tons per square inch
atm = atmosphere
1 =litre
Multiplying cc=cubic centimetre
factor Prefix Symbol gal =gallon
Ib =pound
10'2 tera T Ibm =pound mass
109 gigs G Ibf = pound force
106 mega M k, kip = kilopound
103 kilo k t, T=ton
10-3 milli m tnf, tonf = ton force
10-6 micro P mph =miles per hour
10-9 nano n fpm = feet per minute
10-12 pic0 P kt = knot (nautical mile per hour)
10-15 femto f gpm =gallons per minute
10-18 atto a cfs =cubic feet per second
cfm =cubic feet per minute
N =newton
0. I .5 SI equivalents for Imperial and s, sec = second
US customary units min = minute
h = hour
Abbreviations used hp = horsepower
kW = kilowatt
m =metre Btu = British thermal unit
km = kilometre J =joule
in. =inch
ft =foot
yd = yard Length
m, mi = mile
Pa = pascal (N mZ) 1 in. = 25.4 mm = 0.0254 m.
psi =pounds per square inch lft=305mm=0.305m.