World Gold Coin Fineness & Actual Gold Weight (AGW) Calculator
Calculate Actual Gold Weight (AGW), millesimal fineness, pure gold grams, and live melt value
for global legal tender gold bullion coins including Sovereigns, 20 Francs, Centenarios, Krugerrands, and Ducats.
World Gold Coin Selector
Number of Coins in Stack1 Coin
Gold Spot Price (USD / Troy Oz)$2,700.00
Live Valuation & Purity HUD
Total Gold Value
$635.58
$635.58 Per Coin • AGW: 0.2354 oz t
Actual Gold Weight (AGW)
0.2354 oz t
7.322 g pure gold
Gross Weight & Karat
22k (91.67%)
7.988 g gross weight
Alloy Composition
Crown Gold
8.33% Copper (Durable)
Global Liquidity Tier
World Anchor
Instantly Tradable Anywhere
Pure Gold vs. Alloy Composition Ring
Canvas dynamically displays the proportion of pure 24k gold (radiant yellow) vs hardening alloy (copper/silver).
Actual Gold Weight (AGW) Formula & Global Monetary Standards
Total Stack Melt Value ($) = Quantity × AGW × SpotPrice ($/oz) × (1 + Premium%)
Pure Gold Grams = GrossWeight (grams) × (Fineness / 1000)
For centuries, global trade operated upon metallic gold standards. To ensure coins could circulate daily in commerce
without excessively rapid wear, world mints alloyed pure gold with small percentages of copper or silver.
The resulting historic issues are widely traded today by bullion stackers because they frequently trade at
lower premiums over spot than newly minted 1-ounce coins.
Coin Specification
Issuing Country
Gross Weight
Karat & Fineness
Actual Gold Weight (AGW)
Historical Era
British Full Sovereign
United Kingdom
7.9881 grams
22k (0.9167 fine)
0.2354 troy oz (7.32g)
1817–Present (George III to Charles III)
French 20 Francs (Rooster)
France
6.4516 grams
21.6k (0.900 fine)
0.1867 troy oz (5.81g)
1899–1914 (Third Republic)
Swiss 20 Francs Vreneli
Switzerland
6.4516 grams
21.6k (0.900 fine)
0.1867 troy oz (5.81g)
1897–1949 (Bern Mint)
Mexican 50 Pesos Centenario
Mexico
41.666 grams
21.6k (0.900 fine)
1.20565 troy oz (37.50g)
1921–1947 (Winged Victory)
Austrian 4 Ducat
Austria
13.9636 grams
23.68k (0.986 fine)
0.4430 troy oz (13.77g)
1915 Official Restrike (Franz Joseph)
South African Krugerrand
South Africa
33.930 grams
22k (0.9167 fine)
1.000 troy oz (31.10g)
1967–Present (First 1-oz Bullion Coin)
Worked Bullion Example: 10 British Sovereigns vs. 2 Mexican 50 Pesos
Worked Example (Comparing Sovereign vs. Centenario):
Assume gold is trading at $2,700.00 per troy ounce:
10 British Sovereigns: Each Sovereign contains 0.2354 oz AGW.
10 \times 0.2354 = 2.354 \text{ troy oz pure gold} \times \$2,700.00 = \mathbf{\$6,355.80}.
2 Mexican 50 Pesos: Each Centenario contains 1.20565 oz AGW.
2 \times 1.20565 = 2.4113 \text{ troy oz pure gold} \times \$2,700.00 = \mathbf{\$6,510.51}.
Comparison Takeaway: Two Mexican 50 Pesos provide 0.057 troy ounces MORE gold than 10 Sovereigns (~$155 extra gold value) for approximately the same total investment capital, while Sovereigns provide maximum fractional divisibility.
Three Typical World Gold Bullion Portfolios
Portfolio Archetype
Composition
Total AGW
Value at $2,700 Spot
Investment Advantage
1. The Latin Fractional Pack
10 French & Swiss 20 Francs
1.867 troy oz
$5,040.90
Highly liquid, internationally recognized European trade size (~$500/coin).
2. Heavyweight Bullion Anchor
5 Mexican 50 Pesos Centenarios
6.028 troy oz
$16,275.60
Extremely low premium per ounce, massive hand-feel, historical significance.
3. Ultra-High Purity Aristocrat
5 Austrian 4 Ducats
2.215 troy oz
$5,980.50
Stunning 23.68k gold (0.986 fine); brilliant medieval-style large thin flan.
Frequently Asked Questions (FAQs)
What is Actual Gold Weight (AGW)?
Actual Gold Weight (AGW) represents the exact mass of pure 24-karat gold contained within a coin, excluding any alloying metals such as copper or silver. It is calculated by multiplying the gross coin weight in troy ounces by its millesimal fineness (e.g., a British Sovereign weighs 0.2568 troy oz gross at 0.9167 fine = 0.2354 troy oz AGW).
How much pure gold is in a British Gold Sovereign?
A standard British Full Sovereign has a gross weight of 7.9881 grams struck from 22-karat 'Crown Gold' (91.67% pure gold and 8.33% copper). It contains exactly 7.3224 grams or 0.2354 troy ounces of pure gold (AGW).
What was the Latin Monetary Union (LMU) 20 Francs standard?
Established in 1865 between France, Belgium, Italy, Switzerland, and later Greece, the Latin Monetary Union standardized gold coinage: every 20-unit coin (French 20 Francs, Swiss 20 Francs Vreneli, Italian 20 Lire, Belgian 20 Francs) weighs exactly 6.4516 grams of 90.0% gold, containing 5.806 grams or 0.1867 troy ounces of pure gold.
Why is the Mexican 50 Peso Centenario so popular among gold investors?
First minted in 1921 to commemorate the centennial of Mexico's War of Independence, the 50 Peso Centenario contains 37.5 grams (1.20565 troy ounces) of pure gold, making it over 20% larger than a standard 1-ounce bullion coin. Due to its impressive 37mm diameter, iconic Winged Victory obverse, and lower dealer premiums, it remains one of the world's most sought-after gold bullion coins.
What is the difference between 22k Crown Gold and 24k Pure Gold bullion?
Coins struck in 22k gold (such as the American Gold Eagle and South African Krugerrand) contain 91.67% gold alloyed with copper and/or silver to resist scratching and wear during handling. Coins struck in 24k gold (like the American Buffalo, Canadian Maple Leaf, and Austrian Philharmonic) are 99.99% pure gold, exhibiting a richer golden color but softer surface susceptible to handling damage.
Why did the Chinese Gold Panda switch from troy ounces to metric grams?
In 2016, the People's Bank of China transitioned the Chinese Panda gold bullion series to the metric system. Instead of the traditional 1 troy ounce (31.103 grams), the standard coin contains 30.0 grams of 0.999 fine gold (0.9645 troy oz). Fractional sizes were standardized to 15g, 8g, 3g, and 1g.