Spot9K Gold Calculator (9ct / 9 Carat)
Calculate the melt value of 9K gold, also called 9ct or 9 carat gold. It contains 37.5% gold by weight and is commonly stamped 375.
Gold · $3,887.60 USD/ozt · $124.99 USD/gMarket quote · Gold API · 2026-11-14 14:09 UTC
Your item
100% Melt Value
3.75 g fine gold
- Estimated buyer payout · 80%
- $374.97
- Illustrative payout range · 70–100%
- $328.10 – $468.71
9K gold price by weight
| Weight | Melt value (USD) |
|---|---|
| 1 g | $46.87 |
| 5 g | $234.35 |
| 10 g | $468.71 |
| 20 g | $937.42 |
| 30 g | $1,406.13 |
| 40 g | $1,874.84 |
| 50 g | $2,343.55 |
| 100 g | $4,687.10 |
How to calculate melt value
Melt value = weight in grams × purity fraction × (USD spot price per ozt ÷ 31.1034768)
At 9K purity, 10 g contains 3.7500 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 pure is 9K gold?
9K is 9/24 gold by weight on the nominal karat scale.
What does a 375 mark mean?
It indicates approximately 375 parts gold per thousand. Confirm the alloy if the stamp is worn or the piece is plated.
Can I see the result in British pounds?
Select GBP to convert the estimate using the displayed exchange-rate date. The default reference table is in USD.
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.