Silver Melt Value Calculator

This worksheet estimates the value of the silver content in an item or batch. Enter total item weight, choose whether that weight is in grams, troy ounces, or ordinary ounces, select or enter silver purity, and supply a silver price per troy ounce. An optional other-metal price adds a separate alloy-value comparison without changing the headline silver melt value.

From item weight to silver value

Weights are first expressed in troy ounces. The accepted conversions are:

$1\text{ troy oz}=31.1034768\text{ g}$ $1\text{ ordinary oz}=28.349523125\text{ g}$

Then:

$\text{pure silver troy oz}=\text{total troy oz}\times\frac{\text{purity percent}}{100}$ $\text{silver melt value}=\text{pure silver troy oz}\times\text{silver price per troy oz}$

If an other-metal price is entered, the separate alloy value adds the non-silver troy ounces times that price. It is not part of the displayed silver-content melt value.

Recomputed example

For 100 g of 92.5% silver at $30 per troy ounce:

• total mass is 100/31.1034768=3.2150746568… troy oz;
• pure silver is 3.2150746568…×0.925=2.9739440576… troy oz;
• silver melt value is 2.9739440576…×30=$89.2183217…, displayed as $89.22.

Interpreting a metal-content estimate

The result uses the purity and prices entered. It does not retrieve a live quote or establish that an item’s hallmark, assay, or stated purity is accurate. Do not confuse an ordinary ounce with a troy ounce; one ordinary ounce is about 0.91146 troy ounce. Also avoid entering the weight of pure silver when the selected purity is already below 100%, because that applies purity twice.

The result excludes any amounts not represented by the entered weight, purity, and prices. Verify the weight and purity independently before using the estimate.

Sources and supported guidance

• Claim: one troy ounce is 31.1034768 grams and one avoirdupois ounce is 28.349523125 grams. Source: NIST SP 811, Appendix B conversion factors, National Institute of Standards and Technology. Version: 2008 edition. Scope: mass-unit conversions only. Accessed 2026-07-10.

The source supports only the mapped unit conversions. The remaining equations describe the entered arithmetic scenario; they are not an appraisal, market quote, or investment recommendation.