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Symbol:  lb 
Category:  Mass 
SI Equivalent:  0.453592 kg
System:  UK, US, FPS 
The pound has been adopted by the Weights and Measures Act (WMA) in England and by the US Metric Board (USMB) as exactly 0.45359237 kg.
Convert     lb  
1 lb =
  Symbol Unit Name
4.9794×1029  m0, me  a.u. of mass (electron rest mass) 
15.5516    assay ton 
2.7316×1026  u, uma, Da(12C), AMU  atomic unit of mass (12C) 
2.73246×1026  u, uma, Da(16O), AMU  atomic unit of mass (16O) 
2.71039×1026  u, uma, Da(1H), AMU  atomic unit of mass (1H) 
4.53592×1020  ag  attogram 
2.73189×1023    avogram 
1.06383×10-2    bag (UK, cement) 
2267.96  ct.  carat (metric) 
2210.52  ct (troy)  carat (troy) 
10×10-3  cH, cwt  cental 
4.53592×104  cg  centigram 
2.7316×1026  u, uma, Da  dalton (atomic unit of mass) 
45.3592  dag  decagram 
4535.92  dg  decigram 
116.667  dr (troy)  dram (troy) 
116.667  dr (ap.), dr (apoth.)  dram or drachm (apothecary) 
256  dr (av.), dr (avdp)  dram or drachm (avoirdupois) 
4.97939×1029  m0, me  electron rest mass (a.u. of mass) 
4.53592×10-16  Eg  exagram 
4.53592×1017  fg  femtogram 
4.53592×108  g  gamma (mass) 
3.1081×10-2  slug  geepound (slug) 
4.53592×10-7  Gg  gigagram 
7000  gr (apoth.), gr (ap.)  grain (apothecary) 
7000  gr (avdp.), gr (av.)  grain (avoirdupois) 
7000  gr (troy)  grain (troy) 
453.592  g  gram 
4.53592  hg  hectogram 
8.92857×10-3  cH, cwt, lg cwt  hundredweight (gross or long) 
10×10-3  sh. cwt  hundredweight (net or short) 
8.92857×10-3  cwt (av.)  hundredweight (UK, avoirdupois) 
4.62535×10-2  Hyl, hyl  hyl 
0.453592  kg  kilogram 
10×10-4  kip  kilopound (kip) 
7.71605×10-4    load (UK) 
4.7619×10-4    load (UK, wool) 
4.46429×10-4  lg ton (UK)  long ton (UK) 
4.53592×10-4  Mg  megagram 
4.62535×10-2  mug  metric slug (hyl) 
4.53592×108  µg  microgram 
4.53592×105  mg  milligram 
4.62535×10-2    MKpS unit of mass 
4.62535×10-2  mug  mug (hyl, metric clug, par, TME) 
4.53592×1011  ng  nanogram 
14.5833  oz (apoth.), oz (ap.)  ounce (apothecary) 
16  oz (advp.), oz (av.)  ounce (avoirdupois) 
14.5833  oz (troy)  ounce (troy) 
4.62535×10-2  par  par (hyl, mug, metric slug) 
291.667  dwt (troy)  pennyweight (troy) 
4.53592×10-13  Pg  petagram 
4.53592×1014  pg  picogram 
lb (av.)  pound (avoirdupois) 
1.21528  lb (troy), lb (tr.)  pound (troy) 
1.66667  lb (UK, new hay)  pound (UK, new hay) 
1.55556  lb (UK, obsolete hay)  pound (UK, obsolete hay) 
lb (UK, straw)  pound (UK, straw) 
lb (US)  pound (US) 
3.57143×10-2    quarter (UK, mass) 
1.78571×10-3    quarter (US, long) 
2×10-3    quarter (US, short) 
4.53592×10-3  q  quintal (metric) 
10×10-3  quint. (US, UK)  quintal (US, UK) 
2.85714×10-3    sack (UK, weight) 
350  s, scr (ap.)  scruple (UK, US, apoth.) 
5×10-4  sh. Ton  short ton (US, ton) 
3.1081×10-2    slug (geepound) 
7.14286×10-2  st (UK)  stone (UK) 
8×10-2  st (UK, wool)  stone (UK, wool) 
4.53592×10-10  Tg  teragram 
4.53592×10-4    ton (metric) 
4.46429×10-4  UK ton, lg ton  ton (UK, long) 
5×10-4    ton (US, short) 
4.53592×10-4  t  tonne (metric) 
2.77778×10-2    truss 
4.53592×1026  yg  yoctogram 
4.53592×10-22  Yg  yottagram 
4.53592×1023  zg  zeptogram 
4.53592×10-19  Zg  zettagram