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Mass
Unit Name Symbol SI Equivalent 
· a.u. of mass (electron rest mass) 
m0, me  9.10938x10-31 kg 
· assay ton 
  2.9167x10-2 kg 
· atomic unit of mass (12C) 
u, uma, Da(12C), AMU  1.66054x10-27 kg 
· atomic unit of mass (16O) 
u, uma, Da(16O), AMU  1.66001x10-27 kg 
· atomic unit of mass (1H) 
u, uma, Da(1H), AMU  1.67353x10-27 kg 
· attogram 
ag  10x10-22 kg 
· avogram 
  1.66036x10-24 kg 
· bag (UK, cement) 
  42.6377 kg 
· carat (metric) 
ct.  2x10-4 kg 
· carat (troy) 
ct (troy)  2.05197x10-4 kg 
· cental 
cH, cwt  45.3592 kg 
· centigram 
cg  10x10-6 kg 
· dalton (atomic unit of mass) 
u, uma, Da  1.66054x10-27 kg 
· decagram 
dag  10x10-3 kg 
· decigram 
dg  10x10-5 kg 
· dram (troy) 
dr (troy)  3.88793x10-3 kg 
· dram or drachm (apothecary) 
dr (ap.), dr (apoth.)  3.88793x10-3 kg 
· dram or drachm (avoirdupois) 
dr (av.), dr (avdp)  1.77185x10-3 kg 
· electron rest mass (a.u. of mass) 
m0, me  9.10939x10-31 kg 
· exagram 
Eg  10x1014 kg 
· femtogram 
fg  1x10-18 kg 
· gamma (mass) 
g  10x10-10 kg 
· geepound (slug) 
slug  14.5939 kg 
· gigagram 
Gg  1x106 kg 
· grain (apothecary) 
gr (apoth.), gr (ap.)  6.47989x10-5 kg 
· grain (avoirdupois) 
gr (avdp.), gr (av.)  6.47989x10-5 kg 
· grain (troy) 
gr (troy)  6.47989x10-5 kg 
· gram 
g  1x10-3 kg 
· hectogram 
hg  0.1 kg 
· hundredweight (gross or long) 
cH, cwt, lg cwt  50.8023 kg 
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List Units: A B C D E-F G H-I J-L M N O-P Q-R S T U-Z
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Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

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Optimize your designs, reduce machining time, and lower your costs.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

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