SpotGold Calculator
Find the melt value of gold jewelry, coins and scrap by weight and purity. Compare the metal value with a buyer’s estimated payout.
Gold · $3,887.60 USD/ozt · $124.99 USD/gMarket quote · Gold API · 2026-11-14 13:39 UTC
Your item
100% Melt Value
10 g fine gold
- Estimated buyer payout · 80%
- $999.91
- Illustrative payout range · 70–100%
- $874.92 – $1,249.89
Gold price by weight and karat
Swipe to see all karats.
| Weight | 24K (USD) | 22K (USD) | 18K (USD) | 14K (USD) | 10K (USD) | 9K (9ct) (USD) |
|---|---|---|---|---|---|---|
| 1 g | $124.99 | $114.57 | $93.74 | $72.91 | $52.08 | $46.87 |
| 5 g | $624.95 | $572.87 | $468.71 | $364.55 | $260.39 | $234.35 |
| 10 g | $1,249.89 | $1,145.73 | $937.42 | $729.10 | $520.79 | $468.71 |
| 20 g | $2,499.78 | $2,291.47 | $1,874.84 | $1,458.21 | $1,041.58 | $937.42 |
| 30 g | $3,749.68 | $3,437.20 | $2,812.26 | $2,187.31 | $1,562.37 | $1,406.13 |
| 40 g | $4,999.57 | $4,582.94 | $3,749.68 | $2,916.42 | $2,083.15 | $1,874.84 |
| 50 g | $6,249.46 | $5,728.67 | $4,687.10 | $3,645.52 | $2,603.94 | $2,343.55 |
| 100 g | $12,498.92 | $11,457.35 | $9,374.19 | $7,291.04 | $5,207.89 | $4,687.10 |
How to calculate melt value
Melt value = weight in grams × purity fraction × (USD spot price per ozt ÷ 31.1034768)
At 24K purity, 10 g contains 10.0000 g of fine gold. Use 31.1034768 g per troy ounce or 1.55517384 g per pennyweight.
Estimated payout = melt value × selected payout percentage.
Gold Hallmark & Stamp Guide
| Stamp | Karat | Gold content |
|---|---|---|
| 999 | 24K | 99.9% |
| 916 | 22K | 91.6% |
| 875 | 21K | 87.5% |
| 750 | 18K | 75.0% |
| 585 | 14K | 58.5% |
| 417 | 10K | 41.7% |
| 375 | 9K / 9ct | 37.5% |
Frequently asked questions
How do I calculate gold value from a spot quote?
Multiply the alloy weight in grams by its gold fraction, then multiply by the USD spot price per troy ounce divided by 31.1034768.
What is the difference between karat and carat?
Karat measures gold purity, and carat is also used for gold purity in the UK. For gemstones, one carat measures 0.2 grams.
Why does a dealer offer less than melt value?
A buyer may deduct refining, testing, shipping or operating costs. Ask for a written net offer with the tested purity and payable weight.
Should I weigh gemstones with the gold?
Use only the weight of the gold alloy. Stones, springs and other non-gold parts can overstate the result.
How many grams are in a troy ounce?
One troy ounce equals 31.1034768 grams. One pennyweight equals one twentieth of a troy ounce.
What do stamps like 14K GP, GF, HGE, or GEP mean for melt value?
These marks describe a gold layer, so do not use the standard 14K setting for the whole item. GP (Gold Plated), HGE (Heavy Gold Electroplate), and GEP (Gold Electroplated) indicate a coating that usually has negligible recoverable value on an individual piece. GF (Gold Filled) and RGP (Rolled Gold Plate) indicate a thicker, mechanically bonded layer. A 1/20 14K GF mark means the 14K alloy layer accounts for one twentieth (5%) of the metal weight. RGP can have a different fraction. Refiners may require bulk lots because of processing costs.