Precious Metals & Bullion

How many troy ounces of fine gold are in 100 grams of 18K gold?

⚡ Instant Calculated Answer

100 grams of 18K gold contains exactly 75.0 grams (2.4113 troy ounces) of pure fine gold, with an intrinsic scrap melt value of approximately $6,510.51 USD at $2,700/oz t.

2.4113 oz t Primary Metric
75.0 g Fine Au Secondary Metric

📐 Mathematical Formula & Step-by-Step Substitution

\[ W_{fine} = W_{gross} \cdot \left(\frac{18}{24}\right) = 100 \cdot 0.7500 = 75.0 \text{ g} = 2.4113 \text{ oz t} \]
Fine_Weight = 100g * (18/24) = 75.0g = 2.4113 oz t
  1. Determine fineness ratio of 18K gold: 18 / 24 = 0.7500 (or 750.0‰ millesimal fineness).
  2. Multiply gross weight by fineness: 100 g × 0.7500 = 75.0 grams of fine elemental gold (Au).
  3. Convert grams to troy ounces (1 oz t = 31.1034768 g): 75.0 / 31.1034768 = 2.4113 troy ounces.
  4. Convert grams to tolas (1 tola = 11.6638 g): 75.0 / 11.6638 = 6.4302 tolas.

📊 Nearby Parameter Reference Table

Gross Weight Fine Gold (g) Fine Gold (oz t) Melt Value ($2,700/oz)
50 g 37.5 g 1.2057 oz t $3,255.39
80 g 60.0 g 1.929 oz t $5,208.30
100 g 75.0 g 2.4113 oz t $6,510.51
120 g 90.0 g 2.8936 oz t $7,812.72
150 g 112.5 g 3.617 oz t $9,765.90
200 g 150.0 g 4.8226 oz t $13,021.02
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