Platinum value calculator

Match the quote unit to your input

Fine-metal grams × (entered price ÷ grams in selected price unit) = reference metal value. For a quote per gram the divisor is 1; per kilogram it is 1,000; per troy ounce it is 31.1034768. The examples elsewhere on this page retain their stated quote units. Results are calculations from your manual input, not current market prices or guaranteed offers.

For confirmed platinum, fineness 950 means 95%; 900 means 90%; 850 means 85%. Enter the percentage, not the three-digit mark. A bare 925 stamp does not establish platinum: 925 commonly identifies sterling silver. Confirm the metal and assay before applying a platinum quote. See the FTC jewelry marking guide.

Platinum calculator formula

The calculator converts all supported weight units to grams first. It preserves full internal precision and rounds only the displayed result.

How to calculate platinum value

1. Choose a dated platinum price and select its quoted unit, record its currency, and identify whether it is bid, ask, midpoint, benchmark or settlement.
2. Weigh only the platinum alloy where possible. Gemstones and unrelated components are not platinum weight.
3. Choose grams, troy ounces or another correctly identified weight unit.
4. Convert fineness to percentage: 950 becomes 95%, 900 becomes 90% and 850 becomes 85%.
5. Enter 100% only to see theoretical benchmark value, then model transaction deductions separately.

Hypothetical example

Consider 10 grams of verified 950 platinum, a hypothetical reference price of $1,000 per troy ounce and an 80% payout assumption. These are example inputs, not current prices or a typical dealer rate.

• fine platinum weight: 10 g × 95% = 9.5 g;
• fine troy ounces: 9.5 ÷ 31.1034768 = about 0.3054 oz t;
• benchmark value: about $305.43;
• modeled offer: about $244.35.

Gross weight versus platinum weight

A jewelry scale reports everything placed on it. Stones, springs, non-platinum findings, dirt and packaging must not be treated as platinum alloy. Even within an alloy, fineness tells you the share that is platinum. Accurate estimates therefore require both a suitable net metal weight and a defensible purity.

Reading platinum fineness

A parts-per-thousand mark can be converted directly: divide it by 10 to obtain percent. Thus 999.5 is 99.95%, 950 is 95%, 900 is 90% and 850 is 85%. However, markings and accompanying symbols vary by jurisdiction, and a mark alone cannot prove composition. Plated pieces and counterfeit marks require particular caution.

Why an offer may differ from benchmark value

• the source price may be an ask or midpoint rather than a buying bid;
• the measured weight may include stones or non-platinum parts;
• purity testing may differ from the stamped fineness;
• the buyer may charge for melting, assay, refining or settlement;
• a small or unusual lot may be harder to resell or process;
• a signed or collectible item may be worth more intact than as metal.

Ask for a quote that identifies net weight, tested fineness, reference price, payable percentage, each fee and settlement time.

Calculator questions

Can I enter a platinum price per gram?

Yes. Select Gram under “Price quoted per” and enter the original per-gram quote. Keep the weight unit separate; a per-gram quote can value an item weighed in any supported unit.

Should I choose ordinary ounce or troy ounce?

Choose the unit actually used by the scale or document. They are different: an ordinary ounce is 28.349523125 g and a troy ounce is 31.1034768 g.

Is benchmark value the same as melt value?

Here it is a theoretical contained-metal value at the entered quote. Actual melt, assay and settlement may change payable content and proceeds, so the result is not a guaranteed melt return.

Can platinum jewelry be worth more than this?

Yes. Maker, design, condition, gemstones, rarity and retail demand can produce resale value beyond metal content. Seek an appropriate jewelry or auction appraisal before destroying a potentially valuable piece.