63 



TABLE 32.— TABLES FOR CONVERTING U. S. WEIGHTS AND MEASURES 



(concluded) 



Part 3. — Miscellaneous equivalents of U. S. and metric weights and measures 1 " 

 (For other equivalents than those below, see Tables 30, 31, and 33.) 



LINEAR MEASURES 



1 mil (.001 in.) = 25.4001 p 



1 in. = .000015783 mile 



1 hand (4 in.) = 10.16002 cm 



1 link (.66 ft) =20.11684 cm 



1 span (9 in.) = 22.86005 cm 



1 fathom (6 ft) = 1.828804 m 



1 rod (5± yd) (25 links) = 5.02910 m 



1 chain (4 rods) = 20.11684 m 



1 light year (9.5 X 10 12 km) = 5.9 X 10 12 

 miles 



1 km) = 19 X 10 12 miles 

 3*2 in. = .794 mm 

 £ in. = 3.175 mm 

 |in. =12.700 mm 



1 angstrom unit = .0000000001 m 



1 micron ( M ) = .000001 m = .00003937 in. 



1 millimicron (m/0 = .000000001 m 



1 m = 4.970960 links = 1.093611 yd 

 = .198838 rod = .0497096 chain 



1 parsec (31 X 10' 

 vh in. = .397 mm 

 re in. = 1.588 mm 

 i in. = 6.350 mm 



MASS MEASURES 

 Avoirdupois weights 



1 grain = .064798918 g 

 1 dram av. (27.34375 gr) = 1.771845 g 

 1 oz av. (16 dr av.) = 28.349527 g 

 lib av. (16 oz av. or 7000 gr) 



= 14.583333 oz ap. (3) or oz t. 



= 1.2152778 or 7000/5760 lb ap. 

 ort. 



= 453.5924277 g 

 lkg = 2.204622341 lb av. 

 lg =1 5.432356 gr = . 5643833 dr av. 



= .03527396 oz av. 

 1 short hundred weight (100 lb) 



= 45.359243 kg 

 1 long hundred weight (112 lb) 



= 50.802352 kg 

 1 short ton (2000 lb) 



= 907.18486 kg 

 1 long ton (2240 lb) 



= 1016.04704 kg 

 1 metric ton = 0.98420640 long ton 

 = 1.1023112 short tons 



Troy weights 



1 pennyweight (dwt24gr) = 1.555174 g 

 gr, oz, pd are same as apothecary 



Apothecaries' weights 



1 gr = 64.798918 mg 



1 scruple ( 3 , 20 gr ) =1 .2959784 g 



1 dram (3, 3 3) 

 1 oz G, 8 3) 

 lib (125, 5760 gr) 

 lg= 15.432356 gr 

 = 0.2572059 3 

 lkg = 32.150742 3 



= 3.8879351 g 

 = 31.103481 g 

 = 373.24177 g 

 = 0.771618 3 

 = .03215074 s 

 = 2.6792285 lb 



SQUARE MEASURES 

 1 sq. link (62.7264 in. 2 ) = 404.6873 cm 2 

 1 sq. rod (625 sq. links) = 25.29295 m 2 

 1 sq. chain (16 sq. rods) = 404.6873 m 2 

 1 acre (10 sq. chains) =4046.873 m 2 

 1 sq. mile (640 acres) = 2.589998 km 2 

 1 km 2 =.3861 006 sq. mile 

 1 m 2 = 24.7104 sq. links = 10.76387 ft 2 

 = .039537 sq. rod = .00247104 sq. 

 chain 



CUBIC MEASURES 

 1 board foot (144 in. 3 ) = 2359.8 cm" 

 1 cord (128 ft 8 ) = 3.625 m 3 



CAPACITY MEASURES 

 1 minim (m.) = .0616102 ml 

 1 fl. dram (60 111) = 3.69661 ml 

 1 fl. oz (8 fl. dr) = 1.80469 in. 8 



= 29.5729 ml U. 



lgill (4 fl. oz.) = 7.21875 in. 8 =118.292 



ml 



1 liq. pt (28.875 in. 8 ) = .473167 1 

 1 liq. qt (57.75 in. 8 ) = .946333 1 

 1 gallon (4 qt, 231 in. 8 ) = 3.785332 1 

 1 dry pt (33.6003125 in. 8 ) = .550599 1 

 1 dry qt (67.200625 in. 8 ) = 1.101198 1 

 1 pk (8 dry qt, 537.605 in. 8 ) = 8.80958 1 

 1 bu (4 pk, 2150.42 in. 8 ) = 35.2383 1 

 1 firkin (9 gallons) = 34.06799 1 

 1 liter = .264178 gal = 1.05671 liq. qt 



= 33.8147 fl. oz = 270.518 fl. dr 

 1 ml. = 16.2311 minims. 

 1 dkl. = 18.1620 dry pt = 9.08102 dry qt 

 = 1.13513 pk = .28378 bu 



"Taken from Circular 47 of the National Bureau of Standards, 1915, which see for more complete 

 tables. . 



1 metric carat = 200 mg = 3.0864712 gr 



S. \ dollar should weigh 12.5 g and the 

 smaller silver coins in proportion. 



SMITHSONIAN PHYSICAL TABLES 



