Precious Metal Conversion: 1 gram = 0.64301493137 dwt | Essential for jewelry and precious metal measurements
Accurate conversion between grams (g) and pennyweight (dwt) for jewelry making, precious metal trading, and scientific measurements. Essential for gold, silver, and platinum weight conversions.
Conversion Factor
1 gram (g) = 0.64301493137 dwt | 1 dwt = 1.55517384 grams
Precision: 4 Decimal Places | Formula: dwt = grams × 0.64301493137
Understanding these essential weight units for precious metals, jewelry, and scientific measurements.
Gram to Pennyweight Conversion
1 gram (g) = 0.64301493137 pennyweight (dwt)
1 pennyweight (dwt) = 1.55517384 grams
Pennyweight = Grams × 0.64301493137
Grams = Pennyweight × 1.55517384
Convert 10 grams to pennyweight (common gold weight):
dwt = grams × 0.64301493137
dwt = 10 × 0.64301493137
dwt = 6.4301 (with 4 decimal places)
Convert 20 pennyweight to grams (common jewelry weight):
grams = dwt × 1.55517384
grams = 20 × 1.55517384
grams = 31.1035 (with 4 decimal places)
Note: These conversions use the international standard for precious metal measurements
The metric unit of mass equal to one thousandth of a kilogram. It's the standard unit of mass in the International System of Units (SI) and widely used worldwide for scientific and commercial measurements.
Equivalents:
Note: The gram is the standard unit for precious metal purity (e.g., 999 fine gold)
A unit of mass equal to 24 grains or 1/20 of a troy ounce. It's primarily used in the jewelry industry and for measuring precious metals like gold, silver, and platinum.
Equivalents:
Note: Pennyweight is the traditional unit for jewelry in North America and Europe
| Grams (g) | Pennyweight (dwt) | Troy Ounces | Avoirdupois Ounces | Common Uses |
|---|---|---|---|---|
| 1 g | 0.64301 dwt | 0.03215 oz t | 0.03527 oz | Small jewelry components |
| 1.55517 g | 1 dwt | 0.05 oz t | 0.05486 oz | Standard pennyweight measure |
| 10 g | 6.43015 dwt | 0.32151 oz t | 0.35274 oz | Small gold/silver items |
| 31.1035 g | 20 dwt | 1 oz t | 1.09714 oz | Standard troy ounce |
| 100 g | 64.3015 dwt | 3.21507 oz t | 3.52740 oz | Larger jewelry pieces |
| 1000 g | 643.0149 dwt | 32.1507 oz t | 35.2740 oz | Bullion bars and coins |
Common questions about grams, pennyweight, and precious metal measurements.
The exact conversion factors between grams and pennyweight are:
1 gram (g) = 0.64301493137 pennyweight (dwt)
1 pennyweight (dwt) = 1.55517384 grams
Pennyweight to Grams: grams = dwt × 1.55517384
Grams to Pennyweight: dwt = grams × 0.64301493137
These conversion factors are based on the international standard where 1 troy ounce = 20 pennyweight = 31.1034768 grams. For most practical jewelry and precious metal applications, using 1 gram = 0.643 dwt or 1 dwt = 1.555 grams provides sufficient accuracy.
Pennyweight (dwt) remains the traditional unit for precious metals for several historical and practical reasons:
While grams are the metric standard, pennyweight remains dominant in the jewelry and precious metals industry, especially in North America. This converter supports both units to accommodate all users.
Troy ounces and avoirdupois ounces are different weight systems with important distinctions:
This converter uses troy weight measurements (pennyweight) which are standard for precious metals and jewelry applications.
The required precision for gram to dwt conversions depends on the application:
This converter defaults to 4 decimal places, which provides sufficient precision for most jewelry and retail precious metal applications. For high-value precious metal trading, 6 decimal places are recommended to ensure accurate valuation of expensive metals like gold and platinum.
Pennyweight measurements work alongside gold purity (karat) to determine the actual precious metal content:
This converter focuses on weight conversion (grams ↔ dwt), which is the first step in determining precious metal content and value. Always factor in purity (karats) when calculating the actual precious metal value of jewelry or bullion.
Common precious metal weights for jewelry, bullion, and scientific calculations.
| Grams (g) | Pennyweight (dwt) | Troy Ounces | Avoirdupois Ounces | Common Uses |
|---|---|---|---|---|
| 1 g | 0.64301 dwt | 0.03215 oz t | 0.03527 oz | Small jewelry components |
| 1.55517 g | 1 dwt | 0.05 oz t | 0.05486 oz | Standard pennyweight measure |
| 5 g | 3.21507 dwt | 0.16075 oz t | 0.17637 oz | Small gold/silver items |
| 10 g | 6.43015 dwt | 0.32151 oz t | 0.35274 oz | Medium jewelry pieces |
| 15.5517 g | 10 dwt | 0.5 oz t | 0.54857 oz | Half troy ounce equivalent |
| 31.1035 g | 20 dwt | 1 oz t | 1.09714 oz | Standard troy ounce |
| 50 g | 32.1507 dwt | 1.60754 oz t | 1.76370 oz | Larger jewelry pieces |
| 100 g | 64.3015 dwt | 3.21507 oz t | 3.52740 oz | Bullion and investment items |
| 311.035 g | 200 dwt | 10 oz t | 10.97143 oz | Investment bullion bars |
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