These units and conversion factors are not typically found in engineering work, but are still fairly common in some fields like medicine. Now, finding a contemporary application for the scruple or the chain is highly unlikely, but if you ever need them or any other of these strange measures, well, you know where to go now. Dry measures, liquid measures, solid measures and others are mixed in.
1 pound (Av)
453.592 g
1 pound (Ap)
373.242 g
1 ounce (Av)
28.35 g
1 ounce (Ap)
31.10 g, 480 grains
15 grains
1 g
10 grains
600 mg
7 1/2 grains
500 mg
5 grains
300 mg
1 1/2 grains
100 mg
1 grain
64.79891 mg
1 pound
0.45 kg
1000 mcg
300 to 7000 iu (see right)
1 scruple
1.2 g, 20 grains
1 gal
3785 ml, 4 qts, 0.833 Imp gal
1 pt
473.18 ml
1 fl oz
29.57 ml
1 cc
1 gm, 1 ml
1 minim
1 drop, 0.0616 ml
1 tsp
5 ml
1 tsp
15 ml
1 stone
6.35 kg
1 dram
3 scruples
1 hundredweight
100 lbs
1 ton
2000 lbs
1 long ton
2240 lbs
1 pt
4 gills
1 hogshead
63 gallons
1 pipe or butt
2 hogsheads
1 tun
2 pipes
1 mile
320 rods
1 peck
2 gallons
1 bushel
4 pecks
1 fathom
6 ft, 2 yds
1 furlong
1/8 mile, 660 ft, 220 yds
1 league
3 mi, 24 furlongs
1 chain
100 links, 22 yds
1 acre
43560 sq ft, 0.40 hectare, 10 sq chains
1 sq rod
625 sq links
1 square
100 sq ft
1 board ft
144 cu in
Ap = Apothecary
mg = milligram
Av = Avoirdupois
g = gram
mcg = microgram
kg = kilogram
gal = gallon
ml = milliliter
fl oz = fluid ounce
qt = quart
gr = grain
gtts = drops
sc = scruple
st = stone
l or L = liter
oz = ounce
ft = foot
pt = pint
in = inch
lb = pound
yd = yard
cc = cubic centimeters
mi = mile
Imp gal = Imperial gallon
m = meter
dr = drachm = drachma = dram
Vitamin A, 1 i.u. = 0.3µg retinol, 3.6µg b-carotene, or 7.2µg other vitamin A carotenoids Vitamin D, 1 i.u. = 0.025µg cholecalciferol Vitamin E, 1 i.u. = 0.67µg natural a-tocopherol (other conversion factors used for other forms of vitamin E)