Fineness · Possession value · Bid / Ask pricing
| Fineness | Purity | Possession / g | Bid / g | Ask / g |
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This Silver Melt Calculator converts fineness, weight, price per gram, and dealer spread into a clear silver valuation. Enter the metal’s purity percentage, its weight in grams, a market price per gram, and a spread; the tool returns pure silver content, possession value, bid price, ask price, sell value, buy cost, and round-trip cost. Results update in your browser across 22 display currencies. Get an instant, no-math baseline for sterling, coin, or fine silver.
Silver rarely trades at a single clean number. A sterling chain, a bag of pre-1965 coins, and a fine-silver round all carry different fineness marks, and the price a dealer quotes usually sits below the published spot. This Silver Melt Calculator separates those moving parts. You supply the fineness, the weight, the price per gram of pure silver, and the spread you expect; the tool returns the pure silver content, the possession value at market, and both sides of the trade. It suits jewellers pricing estate pieces, coin collectors checking melt before selling, and anyone testing whether a refiner’s offer makes sense. The math stays visible, so you can see exactly which input moves the result.
Pick a display currency from the dropdown. This changes the symbol shown, not the conversion.
Choose a fineness preset or type a custom purity percentage.
Enter the weight of your silver in grams.
Type the market price per gram of pure silver in the selected currency.
Set the spread percentage to model bid and ask pricing.
Review the possession value, pure silver content, bid/ask panels, and detailed summary.
Use Calculate, Reset, Copy, Share, or Embed to work with the result.
Possession value is what the pure silver inside an item is worth at the price you enter, before any dealer markup or discount.
Formula: Pure silver content (g) = weight (g) × (purity % ÷ 100)
Formula: Possession value = pure silver content × market price per gram
Formula: Spread amount per gram = market price × (spread % ÷ 100)
Formula: Bid price per gram = market price − (market price × spread % ÷ 200)
Formula: Ask price per gram = market price + (market price × spread % ÷ 200)
Formula: Sell value at bid = pure silver content × bid price per gram
Formula: Buy cost at ask = pure silver content × ask price per gram
Formula: Round-trip cost = buy cost at ask − sell value at bid
The calculator treats negative weight, market price, or spread entries as zero. Purity is limited to 0–100%, and spread is limited to 0–50%. If weight or market price is zero, the badge changes to a neutral prompt and the analysis asks for those inputs. The fineness dropdown and chips map common silver grades to purity percentages: 999 fine, 958 Britannia, 925 sterling, 900 coin, 835 European, and 800 European. The dropdown also lists 720, 500, and 400, plus a Custom option for entering your own purity in the purity field. The currency selector only changes the displayed symbol; it does not perform foreign-exchange conversion.
Suppose you have 250 g of sterling silver flatware at 925 fineness, which equals 92.5% purity. You enter a market price of $0.95 per gram and a dealer spread of 6%.
Step 1: Calculate pure silver content.
250 g × 0.925 = 231.25 g of pure silver.
Step 2: Calculate possession value.
231.25 g × $0.95 = $219.69.
Step 3: Calculate the spread amount per gram.
$0.95 × 0.06 = $0.057.
Step 4: Calculate bid and ask prices.
Bid price = $0.95 × (1 − 0.03) = $0.9215 per gram.
Ask price = $0.95 × (1 + 0.03) = $0.9785 per gram.
Step 5: Calculate trade values.
Sell value at bid = 231.25 g × $0.9215 = $213.10.
Buy cost at ask = 231.25 g × $0.9785 = $226.28.
Round-trip cost = $226.28 − $213.10 = $13.18.
The possession value is about $219.69, but a dealer buying at the bid would pay closer to $213.10. The 6% spread is classified as a normal retail spread. This example shows why the melt value and the actual offer can differ.
It estimates the value of the pure silver inside an item or batch. It takes fineness, weight, a market price per gram, and a dealer spread, then returns possession value plus bid, ask, sell, buy, and round-trip figures.
Divide the fineness number by 10. A 925 stamp means 92.5% purity, 900 means 90%, 999 means 99.9%, and 800 means 80%. The calculator performs this conversion automatically whenever you select a fineness preset or type a purity value.
No. The Silver Melt Calculator does not fetch live prices. You enter the market price per gram yourself, so the result reflects the price you provide. Check a current spot price source before making a trade.
The dropdown includes 999, 958, 925, 900, 835, 800, 720, 500, and 400, plus a Custom option. The quick-select chips cover 999, 958, 925, 900, 835, and 800. You can also type any purity from 0 to 100 into the purity field.
The bid price is what a dealer would pay you for your silver, while the ask price is what a dealer would charge you to buy silver. The calculator splits your entered spread around the market price to estimate both.
A wider spread lowers the bid price and raises the ask price. That means you receive less when selling and pay more when buying. The calculator classifies spreads as tight, normal, wide, or very wide based on the percentage you enter.
Yes. Select 925 for sterling or 900 for US coin silver from the fineness dropdown, or use the matching quick-select chip. The tool then applies the matching purity percentage and updates pure silver content, possession value, and trade prices.
Possession value is the market value of the pure silver content. A dealer offer may be lower because of the bid spread, refining fees, assay costs, profit margin, or the condition of the item. The calculator separates possession value from bid and ask pricing so you can see the difference.
Round-trip cost is the difference between buying at the ask price and selling at the bid price for the same amount of pure silver. It represents the spread cost you would pay if you entered and exited a position at those prices.
Yes. The Silver Melt Calculator is free and runs in your browser. It does not require a signup, and the calculations are performed on your device rather than on a remote server.
The currency dropdown changes the symbol shown for 22 currencies, including USD, EUR, GBP, INR, PKR, and others. It does not convert values, so you should enter the market price per gram in the same currency you select.
Yes. The calculator is built with a responsive layout that adapts to phones, tablets, and desktop screens. You can enter inputs, read the summary table, and copy or share results from a mobile browser.
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