Related entry: Thomas: Weights and Measures.
from The Dispensatory of the United States of America, Wood & Bache, 13th ed., 1876
Scanned version copyright © 2000–2024 Henriette Kress.
Apothecaries' weight. U.S.
| Pound. |
|
Troyounces. |
|
Drachms. |
|
Scruples. |
|
Troy Grains. |
| ℔ 1 |
= |
12 |
= |
96 |
= |
288 |
= |
5760 |
| |
|
℥ 1 |
= |
8 |
= |
24 |
= |
480 |
| |
|
|
|
ʒ 1 |
= |
3 |
= |
60 |
| |
|
|
|
|
|
℈ 1 |
= |
gr. 20 |
The Imperial Standard Troy weight, at present recognised by the British laws, corresponds with the Apothecaries' weight in pounds, ounces and grains, but differs from it in the division of the ounce, which, according to the former scale, contains twenty pennyweights, each weighting twenty-four grains.
Avoirdupois weight. Br.
| Pound. |
|
Ounces. |
|
Drachms. |
|
Troy Grains. |
| ℔ 1 |
= |
16 |
= |
256 |
= |
7000 |
| |
|
oz. 1 |
= |
16 |
= |
437.5 |
| |
|
|
|
dr. 1 |
= |
gr. 27.34375 |
Relative value of Troy and Avoirdupois Weights.
| Pound. |
|
Pounds. |
|
|
Pound. |
|
Ounces. |
|
Grains. |
| 1 Troy |
= |
0.822857 |
Avoirdupois |
= |
0 |
= |
13 |
= |
72.5 |
| 1 Avoirdupois |
= |
1.215277 |
Troy |
= |
1 |
= |
2 |
= |
280 |
Apothecaries' or Wine Measure. U.S.
| Gallon. |
|
Pint. |
|
Fluidounces. |
|
Fluidrachms. |
|
Minims. |
|
Cubic Inches. |
| Cong. 1 |
= |
8 |
= |
128 |
= |
1024 |
= |
61440 |
= |
231 |
| |
|
O 1 |
= |
16 |
= |
128 |
= |
7680 |
= |
28.875 |
| |
|
|
|
f℥ 1 |
= |
8 |
= |
480 |
= |
1.8047 |
| |
|
|
|
|
|
fʒ 1 |
= |
♏︎︎ 60 |
= |
0.2256 |
Imperial measure.
Adopted by the British Pharmacopoeia.
| Gallon. |
|
Pints. |
|
Fluidounces. |
|
Fluidrachms. |
|
Minims. |
| 1 |
= |
8 |
= |
160 |
= |
1280 |
= |
76800 |
| |
|
1 |
= |
20 |
= |
160 |
= |
9600 |
| |
|
|
|
1 |
= |
8 |
= |
480 |
| |
|
|
|
|
|
1 |
= |
60 |
Relative Value of Apothecaries' and Imperial Measure.
| Apothecaries' Measure |
|
Imperial Measure. |
| |
|
Pints. |
Fluidounces. |
Fluidrachms. |
Minims. |
| 1 gallon |
= |
6 |
13 |
2 |
23 |
| 1 pint |
= |
|
16 |
5 |
18 |
| 1 fluidounce |
= |
|
1 |
0 |
20 |
| 1 fluidrachm |
= |
|
|
1 |
2.5 |
| 1 minim |
= |
|
|
|
1.04 |
| Imperial Measure. |
|
Apothecaries' Measure. |
| |
|
Gallon. |
Pints. |
Fluidounces. |
Fluidrachms. |
Minims. |
| 1 gallon |
= |
1 |
1 |
9 |
5 |
8 |
| 1 pint |
= |
|
1 |
3 |
1 |
38 |
| 1 fluidounce |
= |
|
|
|
7 |
41 |
| 1 fluidrachm |
= |
|
|
|
|
58 |
| 1 minim |
= |
|
|
|
|
0.96 |
Relative Value of Weights and Measures in Distilled Water at 60° Fahrenheit.
1. Value of Apothecaries' Weight in Apothecaries' Measure
| |
|
|
|
Pints. |
Fluidoz. |
Fluidr. |
Minims. |
| 1 pound |
= |
0.7900031 pints |
= |
0 |
12 |
5 |
7.2238 |
| 1 ounce |
= |
1.0533376 fluidounces |
= |
0 |
1 |
0 |
25.6020 |
| 1 drachm |
= |
1.0533376 fluidrachms |
= |
0 |
0 |
1 |
3.2002 |
| 1 scruple |
= |
|
|
0 |
0 |
0 |
21.0667 |
| 1 grain |
= |
|
|
0 |
0 |
0 |
1.0533 |
2. Value of Apothecaries' Measure in Apothecaries' Weight.
| |
|
|
|
℔ |
℥ |
ʒ |
♏︎︎ |
Gr. |
|
Grains. |
| 1 gallon |
= |
10.12654270 pounds |
= |
10 |
1 |
4 |
0 |
8.88 |
= |
58328.886 |
| 1 pint |
= |
1.26581783 pounds |
= |
1 |
3 |
1 |
1 |
11.11 |
= |
7291.1107 |
| 1 fluidounce |
= |
0.94936332 ounces |
= |
0 |
0 |
7 |
1 |
15.69 |
= |
455.6944 |
| 1 fluidrachm |
= |
0.94936332 drachms |
= |
0 |
0 |
0 |
2 |
16.96 |
= |
56.9618 |
| 1 minim |
= |
0.94936332 grains |
= |
|
|
|
|
|
= |
.9493 |
3. Value of Avoirdupois Weight in Apothecaries' Measure.
| |
|
|
|
Pints. |
Fluidoz. |
Fluidr. |
Minims. |
| 1 pound |
= |
0.9600732 pints |
= |
0 |
15 |
2 |
53.3622 |
| 1 ounce |
= |
0.9600732 fluidounces |
= |
0 |
0 |
7 |
40.8351 |
4. Value of Apothecaries' Measure in Avoirdupois Weight.
| 1 gallon |
= |
8.33269800 pounds. |
| 1 pint |
= |
1.04158725 pounds. |
| 1 fluidounce |
= |
1.04158725 ounces. |
5. Value of Imperial Measure in Apothecaries' and Avoirdupois Weights.
| Imperial Measure. |
Apothecaries' Weight. |
Avoirdupois Weight. |
Grains. |
Cubic Inches. |
| 1 gallon |
= |
|
12 ℔ |
1 ℥ |
6 ʒ |
2 ℈ |
0 gr. |
= |
|
10 ℔ |
0 oz. |
= |
70,000 |
= |
277.27384 |
| 1 pint |
= |
|
1 |
6 |
1 |
2 |
10 |
= |
|
1 |
4 |
= |
8,750 |
= |
34.65923 |
| 1 fluidounce |
= |
|
|
|
7 |
0 |
17.5 |
= |
|
|
1 |
= |
437.5 |
= |
1.73296 |
| 1 fluidrachm |
= |
|
|
|
|
2 |
14.69 |
= |
|
|
|
= |
54.69 |
= |
0.21662 |
| 1 minim |
= |
|
|
|
|
|
|
= |
|
|
|
= |
.91 |
= |
0.00361 |
And, in case you're tired of all those weird measurements, here's how you convert to nice'n'easy metrics (compleat with European decimal notation) (this is not from any Dispensatory; it's from and by Henriette):
| Weight |
| Troy: |
pound |
ounce |
drachm |
scruple |
grain |
gram |
| |
1 |
12 |
96 |
288 |
5760 |
373,24170 |
| |
|
1 |
8 |
24 |
480 |
31,10348 |
| |
|
|
1 |
3 |
60 |
3,88793 |
| |
|
|
|
1 |
20 |
1,29598 |
| |
|
|
|
|
1 |
0,06480 |
| Avoirdupois: |
pound |
ounce |
drachm |
|
troy grain |
gram |
| |
1 |
16 |
256 |
|
7000 |
453,59234 |
| |
|
1 |
16 |
|
437,5 |
28,34952 |
| |
|
|
1 |
|
27,34375 |
1,77185 |
| |
|
|
|
|
1 |
0,06480 |
| Imperial Troy: |
pound |
ounce |
pennyweight |
|
grain |
gram |
| |
1 |
12 |
240 |
|
5760 |
373,24170 |
| |
|
1 |
20 |
|
480 |
31,10348 |
| |
|
|
1 |
|
24 |
1,55517 |
| |
|
|
|
|
1 |
0,06480 |
| Volume |
| Troy: |
gallon |
pint |
fluidounce |
fluidrachm |
minim |
milliliter |
| |
1 |
8 |
128 |
1024 |
61440 |
. 3785,41179 |
| |
|
1 |
16 |
128 |
7680 |
473,17647 |
| |
|
|
1 |
8 |
480 |
29,57353 |
| |
|
|
|
1 |
60 |
3,69669 |
| |
|
|
|
|
1 |
0,06161 |
| Imperial: |
gallon |
pint |
fluidounce |
fluidrachm |
minim |
milliliter |
| |
1 |
8 |
160 |
1280 |
76800 |
4546,09120 |
| |
|
1 |
20 |
160 |
9600 |
568,26140 |
| |
|
|
1 |
8 |
480 |
28,41307 |
| |
|
|
|
1 |
60 |
3,55163 |
| |
|
|
|
|
1 |
0,05919 |
