Weights and Measures Conversion Chart
Printable chart to convert weights and measures including Carats, Grams, Kilograms, Ounces, Pounds and Troy Ounces Pounds and Pennyweights.
By International Gem Society, updated on
| 1″ = 25.4 mm | 1 mm = .039″ |
| Carats | Grams | Kilograms | Ounces Avoirdupois | Pounds Avoirdupois | Ounces Troy | Pounds Troy | Pennyweights Troy | |
| Carats | 1 | 0.2 | 0.0002 | 0.0071 | 0.00044 | .00643 | 0005358 | 7.776 |
| Grams | 5 | 1 | 0.001 | 0.0353 | 0.0022 | .03215 | .002679 | 1.555 |
| Kilograms | 5,000 | 1,000 | 1 | 353 | 2.2 | 32.15 | 2.679 | 0.001555 |
| Ounces Avoirdupois | 141.75 | 28.3 | .0028300 | 1 | 0.0625 | .9115 | .07595 | 0.05486 |
| Pounds Avoirdupois | 2,267.95 | 453.59 | 0.4545455 | 16 | 1 | 14.58 | 1.215 | 0.003429 |
| Ounces Troy | 155.5 | 31.1 | 0.0311 | 1.097 | 0.06857 | 1 | .08333 | 0.05 |
| Pounds Troy | 1,866 | 373.2 | .3732 | 13.17 | .8229 | 12 | 1 | 0.004167 |
| Pennyweights Troy | 7.776 | 1.555 | .001555 | .05486 | .003429 | .05 | .004167 | 1 |
WEIGHTS & MEASURES CONVERSION CHART
Compliments ofThe International Gem Society
Related Articles
Table of Refractive Indices and Double Refraction of Selected Gems
Refractive indices and double refraction (birefringence) help gemologists identify gems. The following table lists these values for selected gemstones.
Read More
Emerald Origins: History and Identification
Emeralds from different sources can vary in quality. Learn how to identify emerald origins by analyzing the optical and physical...
Read More
Birthstone Chart
What are the birthstones by month? January is garnet, February is amethyst, March is aquamarine, April is diamond, May is...
Read More
Diamond Lookalikes Listed by Specific Gravity
Distinguishing diamond lookalikes from the real thing can be challenging. Learn how to use specific gravity and birefringence to make...
Read More
Latest Articles
800 Years of Mogok: A Celebration in Tenuous Times
As Mogok, Myanmar prepares to celebrate its 800th anniversary, the inhabitants of this prolific gem producing region face an uncertain...
Read More
What is the Average Gemstone Faceting Yield?
What’s the average gemstone faceting yield from a single piece of rough? Learn how to estimate how much material you’ll...
Read More
Pyroxmangite Value, Price, and Jewelry Information
Pyroxmangite grains are rare, seldom clean enough to facet, and difficult to cut. However, when cut, they are extremely beautiful...
Read More
How to Identify Emerald Simulants and Synthetics
Gemologists can separate natural emeralds from emerald simulants and synthetics. Learn about the most common tools and techniques for this....
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
