Use this numismatic calculation to document a collection, metal content, historical denomination, minting error, grading cost, auction price, or market scenario with explicit measurements and prices.

Upgrade Probability Percent (%)

Required number input.

Upgraded Sale Price (currency)

Required number input.

Failed Sale Price (currency)

Required number input.

Current Sale Price (currency)

Required number input.

Grading And Shipping Cost (currency)

Required number input.

Estimate expected net gain of resubmission from user-supplied outcome prices and upgrade probability; no grading outcome is predicted. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Expected Net Gain (currency)

The resulting expected net gain returned as a number.

• Coin value and attribution depend on authenticity, date, mint, variety, grade, surfaces, provenance, market liquidity, fees, metal assay, and current spot prices. Images and arithmetic cannot replace expert authentication or in-hand grading.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Retain weight, diameter, photographs, references, transaction fees, and price dates; verify valuable pieces with recognized catalogues and qualified independent experts.

• Precious Metal Allocation Percent

  Find precious-metal holdings as a share of a supplied portfolio value; this is not an allocation recommendation.

• Junk Silver Face Value Multiplier

  Estimate fine silver from face value with an explicitly supplied troy-ounces-per-dollar factor; wear changes the factor.

• Melt Value From Spot Gold

  Price contained gold at a supplied spot price, excluding transaction costs and collectible value.