Scientific and Engineering Terms  ANSI Abbreviations
Abbreviations for Use on Drawings and in Text  ANSI Y1.1.
Abbreviations for Use on Drawings and in Text, ANSI Y1.1  1972:
Term  Abbreviation 

Absolute  abs 
Alternating current  ac 
Amperehour  amp hr 
Angstrom unit  A 
Antilogarithm  antilog 
Arithmetical average  aa 
Atmosphere  atm 
Atomic weight  at wt 
Avoirdupois  avdp 
Barometer  baro 
Board feet (feet board measure)  fbm 
Boiler pressure  bopress 
Boiling point  bp 
Brinell hardness number  Bhn 
British thermal unit  Btu or B 
Bushel  bu 
Calorie  cal 
Candle  cd 
Center to center  c to c 
Centimeter  cm 
Centimetergramsecond (system)  cgs 
Chemical  chem 
Chemically pure  cp 
Circular  circ 
Circular mil  cmil 
Coefficient  coef 
Cologarithm  colog 
Concentrate  conc 
Conductivity  cndct 
Constant  const 
Cord  cd 
Cosecant  csc 
Cosine  cos 
Cost, insurance and freight  cif 
Cotangent  ctn 
Counter electromotive force  cemf 
Cubic  cu 
Cubic centimeter  cm^{3} or cc 
Cubic foot  ft^{3} or cu ft 
Cubic feet per second  ft^{3}/s or cfs 
Cubic inch  in^{3} or cu in 
Cubic meter  m^{3} or cu m 
Cubic millimeter  mm^{3} or cumm 
Cubic yard  yd^{3} or cu yd 
Current density  cd 
Cylinder  cyl 
Decibel  dB 
Degree  de or ^{o} 
Degree Centigrade  ^{o}C 
Degree Fahrenheit  ^{o}F 
Degree Kelvin  K 
Diameter  dia 
Direct current  dc 
Dozen  doz 
Dram  dr 
Efficiency  eff 
Electric  elec 
Electromotive force  emf 
Elevation  el 
Engine  eng 
Engineer  engr 
Engineering  engrg 
Equation  eq 
External  ext 
Fluid  fl 
Foot  ft 
Footcandle  fc 
FootLambert  fL or fl 
Foot per minute  fpm 
Foot per second  fps 
Footpound (unit of work or mechanical energy)  ft lb 
Footpoundsecond (system)  fps 
Free on board  fob 
Freezing point  fp 
Frequency  freq 
Fusion point  fnpt 
Gallon  gal 
Gallon per minute  gpm 
Gallon per second  gps 
Grain  gr 
Gram  g 
Greatest common divisor  gcd 
High pressure  hp 
Horsepower  hp 
Horsepowerhour  hp hr 
Hour  h or hr 
Hyperbolic cosine  cosh 
Hyperbolic sine  sinh 
Hyperbolic tangent  tanh 
Inch  in 
Inch per second  in/s or ips 
Inchpound  in lb 
Indicated horsepowerhour  iph 
Intermediate pressure  ip 
Internal  intl 
Kilovoltampere/hour  KVAh or kVah 
Kilowatthour meter  kwhm 
Latitude  lat 
Least common multiple  lcm 
Liquid  liq 
Logarithm (common)  log 
Logarithm (natural)  ln 
Low pressure  lp 
Lumen per watt  lm/W or lpw 
Magnetomotive force  mmf 
Mathematics (ical)  math 
Maximum  max 
Mean effective pressure  mep 
Melting point  mp 
Meter  m 
Meterkilogramsecond  mks 
Microfarad  μF 
Mile  mi 
Mile per hour  mi/h or mph 
Milliampere  mA 
Minimum  min 
Molecular weight  mol wt 
Molecule  mo 
National Electric Code  NEC 
Ounce  oz 
Ounceinch  oz in 
Pennyweight  dwt 
Pint  pt 
Potential difference  pd 
Pound  lb 
Poundforce foot (torque unit)  lb_{f} ft or lb ft 
Poundforce inch (torque unit)  lb_{f} in or lb in 
poundforce per square foot  lb_{f}/ft^{2} or psf 
poundforce per square inch  lb_{f}/in^{2} or psi 
pound per horsepower  lb/hp or php 
Powerfactor  pf 
Quart  qt 
Reactive voltampere meter  rva 
Revolution per minute  r/min or rpm 
Revolution per second  r/s or rps 
Root mean square  rms 
Round  rnd 
Secant  sec 
Second  s or sec 
Sine  sin 
Specific gravity  sp gr 
Specific heat  sp ht 
Square  sq 
Square centimeter  cm^{2} or sq cm 
Square foot  ft^{2} or sq ft 
Square inch  in^{2} or sq in 
Square kilometer  km^{2} or sq km 
Square root of mean square  rms 
Standard  std 
Tangent  tan 
Temperature  temp 
Tensile strength  ts 
Versed sine  vers 
Volt  V 
Watt  W 
Watthour  Wh 
Week  wk 
Weight  wt 
Yard  yd 
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