| TROY WEIGHT |
AVOIRDUPOIS WEIGHT |
| Used in weighing the precious metals. |
Used in weighing the base metals. |
| 24 grains |
1 pennyweight |
27-1/3 grains |
1 dram (or drahms) |
| 20 pennyweights (dwt) |
1 ounce troy |
16 drams |
1 ounce avoir |
| 12 ounces |
1 pound troy |
16 ounces |
1 pound |
| 5760 grains |
1 pound troy |
16 ounces |
700 grains |
The troy is about 10% heavier than the
Commonly used avoirdupois ounce.
Avoirdupois ounces x 0.9115 = troy ounces. |
the avoirdupois pound is about 21 ½%
heavier than the troy pound.
Troy ounces x 1.0971 = avoirdupois ounces. |
| |
GRAM WEIGHT |
| 1 gram |
= 15.432 grains troy |
31.104 grams |
= 1 ounce troy |
| 1.555 grams |
= 1 pennyweight dwt. |
28.35 grams |
= 1 ounce avoirdupois |
| |
CARAT WEIGHT |
| Used in weighting precious stones and semi-precious gemstones. |
| 1 carat |
= 3.086 grains troy |
|
1 carat |
= 0.20 grams |
| 1 carat |
= 0.007 ounce avoirdupois |
|
1 carat |
= 5 carats |
| The carat is further divided into points for simple measurement. |
| 1 carat |
= 100 points |
|
¼ carat |
= 25 points |
| ½ carat |
= 50 points |
|
1/8 carat |
= 12.5 points |
|
| |
FLUID MEASUREMENT |
1 ounce (fluid) = 29.57 cubic centimetres - 1.8 cubic inches.
1 dram = ½ ounces (fluid) = 1.85 cubic centimetres.
1 quart = 32 ounces (fluid) = 2 pints = ¼ gallon = 57 cubic inches.
1 gallon = 4 quarts = 128 ounces (fluid) = 3.78 litres.
1 litre = 1000cc (slightly more than 1 quart U.S. ) = 0.264 U.S. gallons.
1 imperial gallon = 1.2 U.S. gallons = 4.59 liters = 277.27 cubic inches. |
| |
| TEMPERATURE |
To convert :
Fahrenheit to Centigrade (Celsius) = Subtract 32 from degrees Fahrenheit, multiply remainder by
5, divide the product by 9.
Centigrade to Fahrenheit = Multiply degrees Centigrade by 9, divide product by 5, and add 32. |
 |
The photographs, descriptions and information provided in this catalogue are given in good faith.
We reserve the right to make changes in design and specifications without notice. |
