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.

Total Acquisition Cost (currency)

Required number input.

Coin Count (coins)

Required number input.

Average a lot's acquisition cost over its coins; individual coins may have different actual bases. 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]

Average Cost Basis Per Coin (currency/coin)

The resulting average cost basis per coin 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.

• Mixed Lot Average Melt Per Coin

  Average the known combined metal value over a mixed lot's coin count.

• Diameter Measurement Average

  Average three diameter measurements at different orientations.

• Dimes Per Ounce Silver Yield

  Find the theoretical, possibly fractional number of dimes per troy ounce of contained silver from their actual fine silver mass; round up for whole coins.