# Grams to Pennyweights (g to dwt) Source: https://www.unitconvertercalculator.com/weight/grams-to-pennyweights/ **1 g = 0.64301493137256 dwt** One gram equals approximately 0.6430 pennyweights. The pennyweight (1.555 grams) is roughly one and a half grams, making the conversion nearly 1:1.5. North American gold dealers price scrap gold per pennyweight, so converting from gram-scale laboratory measurements to pennyweight-based pricing is a routine operation in the precious metals industry. ## Formula Apply the conversion factor ## Conversion Table | Grams (g) | Pennyweights (dwt) | |---|---| | 0.5 g | 0.32150746568628 dwt | | 1 g | 0.64301493137256 dwt | | 2 g | 1.2860298627451 dwt | | 5 g | 3.2150746568628 dwt | | 10 g | 6.4301493137256 dwt | | 15 g | 9.6452239705884 dwt | | 20 g | 12.860298627451 dwt | | 25 g | 16.075373284314 dwt | | 50 g | 32.150746568628 dwt | | 100 g | 64.301493137256 dwt | | 200 g | 128.60298627451 dwt | | 250 g | 160.75373284314 dwt | | 500 g | 321.50746568628 dwt | | 1000 g | 643.01493137256 dwt | | 5000 g | 3215.0746568628 dwt | | 10000 g | 6430.1493137256 dwt | ## Units ### Gram (g) A metric unit of mass equal to one thousandth of a kilogram. Widely used in cooking, nutrition labeling, and science. ### Pennyweight (dwt) A pennyweight is a unit of mass equal to 24 grains or 1/20 of a troy ounce (1.55517384 grams). Used in the jewelry trade for weighing precious metals. ## Background A gold ring weighing 5 grams on a jeweler's scale is about 3.215 pennyweights. At scrap 14-karat gold prices of roughly 40 dollars per pennyweight, that ring's melt value is about 129 dollars. The gram-to-pennyweight conversion directly translates laboratory weight to market value in every gold-buying establishment across North America. ## Good to Know The gram was originally defined as the mass of one cubic centimeter of water at 4 degrees Celsius - an elegant connection between length, volume, and mass that was a founding principle of the metric system. Though the kilogram was redefined using the Planck constant in 2019, the gram retains its intuitive water relationship: one milliliter of water weighs approximately one gram, a fact that makes metric cooking and chemistry beautifully simple. ## FAQ ### How many pennyweights are in one gram? One gram contains approximately 0.6430 pennyweights. Conversely, one pennyweight equals about 1.555 grams. ### Where is the pennyweight used? North American precious metals retail: gold dealers, jewelers, pawnshops, and refiners all price and weigh gold in pennyweights. The abbreviation 'dwt' comes from 'denarius weight.' ### Is the gram-pennyweight conversion frequently used? Yes - daily in the North American gold trade. Every time a jeweler weighs an item in grams on a digital scale and quotes a price in pennyweights, this conversion occurs. ## Non-Frequently Asked Questions ### Why do gold dealers not just use grams for everything? Many countries do price gold by the gram (Dubai, India, East Asia). North American dealers use pennyweights because the troy system is deeply embedded in their trade tradition. Switching would require repricing every inventory item, rewriting every purchase receipt format, and retraining every buyer. The pennyweight persists through sheer commercial inertia. ### Is 0.643 pennyweights per gram a number gold dealers know by heart? Experienced gold buyers know that 1 gram is 'about 0.64 dwt' and that 1 pennyweight is 'about 1.55 grams.' They verify on their scales but can estimate mentally. After years of daily conversions, the factor becomes intuitive, like knowing that a dollar is about 0.9 euros without checking the exchange rate. ### If I melted a gram of gold jewelry, what would it be worth? One gram of pure 24-karat gold at mid-2020s prices is worth about 65 dollars (0.643 pennyweights at about 101 dollars per dwt). But most jewelry is 14-karat (58.3% gold), so a gram of 14-karat gold yields about 38 dollars. The gram-to-pennyweight conversion is the first step in every scrap gold valuation. ## Related Articles - [Why We Measure: The Deepest Urge in Human Civilisation](https://www.unitconvertercalculator.com/blog/why-we-measure) - [The Map Is Not the Territory: Why Every Measurement Is Wrong](https://www.unitconvertercalculator.com/blog/the-map-is-not-the-territory) - [Zero: The Most Dangerous Number in Measurement](https://www.unitconvertercalculator.com/blog/zero-the-most-dangerous-number-in-measurement) - [The Kilogram Problem: The Object That Was Its Own Definition](https://www.unitconvertercalculator.com/blog/the-kilogram-problem) - [The Body as a Ruler: Every Measurement Unit That Came From Us](https://www.unitconvertercalculator.com/blog/the-body-as-a-ruler) - [Why Your Recipe Is Lying to You: The Chaos of Cooking Measurements](https://www.unitconvertercalculator.com/blog/why-recipe-measurements-are-unreliable) - [15 Obscure Measurement Units You've Never Heard Of (But Still Need)](https://www.unitconvertercalculator.com/blog/obscure-measurement-units-guide) - [When Measurements Go Wrong - Disasters, Blunders and Happy Accidents](https://www.unitconvertercalculator.com/blog/when-measurements-go-wrong) - [The Surprising Stories Behind Everyday Units of Measurement](https://www.unitconvertercalculator.com/blog/stories-behind-measurement-units) - [Metric vs. Imperial - The Complete Guide to the World's Two Measurement Systems](https://www.unitconvertercalculator.com/blog/metric-vs-imperial-complete-guide) - [Understanding Weight Units - Kilograms, Pounds, Stones & Ounces](https://www.unitconvertercalculator.com/blog/understanding-weight-units) - [Complete Baking Measurement Guide - Cups, Grams, Ounces](https://www.unitconvertercalculator.com/blog/baking-measurement-guide) ## See Also - [Pennyweights to Grams](https://www.unitconvertercalculator.com/weight/pennyweights-to-grams/)