“$100 face value” describes the total denomination printed on the coins. It is not a statement of metal value or purchase price.
What qualifies as common 90% face value
In this context, the lot ordinarily contains pre-1965 U.S. silver dimes, quarters or half dollars. Ten dimes, four quarters or two halves each equal $1 face. These coins are composed of 90% silver at nominal mint weight.
The unworn standard versus a circulated trading estimate
Standard mint-weight silver content is approximately 0.7234 fine troy ounces per $1 face. A common trading convention for circulated coins is approximately 0.715 fine troy ounces per $1 face, accounting for typical wear. Neither is a guarantee for a particular bag.
The $100 example
At an illustrative silver price of $50 per fine troy ounce, 100 × 0.715 × $50 gives $3,575 on the circulated basis. The nominal mint-weight calculation, 100 × 0.7234 × $50, gives $3,617. Both are metal-content estimates—not a price at which a dealer promises to buy.
Why Morgan dollars are calculated separately
Ten Morgan dollars have $10 face value but contain about 7.734 fine troy ounces of silver, not the 7.15 fine troy ounces implied by applying the circulated 90% dime/quarter/half convention. Never mix silver dollars into that calculation.
Mixing 40% and 35% issues
Kennedy halves from 1965–1970 and silver wartime nickels use different purities and silver weights. Count those individually using the mixed collection calculator.
Put the formula to work
Open our multi-coin calculator to enter coin quantities and your own silver or gold spot quotation. For mixed lots, save a private collection and print a metal-content worksheet.
See the source and calculation methodology for published nominal fine-metal weights and additional research references.