21K gold price per gram calculator

21K GOLD · PER GRAM

$109.83

87.5% fine gold · nominal 21/24

Spot price · Nov 2, 1:22 PM UTC · gold-api.com

1 pennyweight
$170.80
1 troy ounce
$3,416.00

Value your 21K gold

Fixed to 21K. Exclude stones, filler and non-gold components from your scale weight.

Gold price: $3,904.00 per troy ounce

Spot price · Nov 2, 1:22 PM UTC · gold-api.com

YOUR METAL WEIGHT

$1,098.27

8.75 g fine gold

21K gold by weight

Net 21K alloy · current gold quote shown above
WeightFine gold (g)Melt value
1 g0.875$109.83
1 dwt1.361$170.80
2 g1.75$219.65
5 g4.375$549.13
10 g8.75$1,098.27
20 g17.5$2,196.54
1 ozt27.216$3,416.00

21K, 22K and 24K comparison

Illustrative 5 g net alloy · equal weight, different gold fraction
KaratFine gold (g)Metal value
21K4.375$549.13
22K4.583$575.28
24K5$627.58

21K is seven-eighths gold

The fraction 21/24 reduces to 7/8, or 87.5%. A fineness mark of 875 specifies that same gold proportion. Use the full net alloy weight rather than weighing only an estimated gold fraction.

A 21K calculation already accounts for the other 12.5% of the alloy. Do not reduce the input weight by the purity a second time.

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