Understand the coin.
Calculate with confidence.

Precious-metal quotes use troy ounces: 1 troy ounce equals 31.1034768 grams. An ordinary avoirdupois ounce is about 28.35 grams and cannot be substituted.

Gross grams describe the whole alloy coin. If starting from gross grams, contained silver in troy ounces = gross grams × silver fraction ÷ 31.1034768. A listed fine-ounce amount already represents contained silver; do not apply purity again.

Contained-metal estimate = quantity × fine troy ounces per coin × dollars per troy ounce. Use the catalog's stated fine-ounce values for this course, retain every supplied digit during calculation, and round the final dollar total to cents.

The American Silver Eagle profile states 1 fine troy ounce; the America the Beautiful large bullion coin states 5, despite its quarter-dollar face value. Their published fine-ounce specifications take precedence over calculations from rounded gross gram weights. Every dollar quote in this course is hypothetical.

Barber dimes (1892–1916), Mercury dimes (1916–1945), and the 1946–1964 Roosevelt group each use 90% silver, 2.5 gross grams, and 0.0723 fine troy ounce in this catalog. The Roosevelt portrait continued on later clad coins, so the portrait alone is insufficient.

Barber quarters (1892–1916), Standing Liberty quarters (1916–1930), and the 1932–1964 Washington group each use 90% silver, 6.25 gross grams, and 0.1808 fine troy ounce here. A Barber portrait does not identify denomination; read the coin's lettering.

For a mixed group, multiply each confirmed profile's count by its own fine-ounce value, add those fine ounces, and then apply the hypothetical quote. Do not silently replace the supplied figures with a generic face-value multiplier.

Barber halves (1892–1915), Walking Liberty halves (1916–1947), Franklin halves (1948–1963), and the 1964 Kennedy half each use 12.5 gross grams, 90% silver, and 0.36169 fine troy ounce per coin.

Separate 1964 Kennedy halves before calculating a mixed Kennedy lot. The 1965–1970 40% profile belongs in another group, while ordinary later circulation issues are clad. Later silver collector editions require their own identification.

Walking Liberty also appears on the American Silver Eagle. Confirm the denomination and issue: the half dollar's 0.36169 fine ounce is different from the Eagle's 1 fine ounce.

The wartime Jefferson nickel profile is 1942–1945, 35% silver, 5 gross grams, and 0.0563 fine troy ounce. Some 1942 nickels are ordinary composition; confirm the large reverse mintmark used on the silver-alloy issue before selecting this profile.

The 1965–1970 Kennedy profile contains 40% silver and 0.1479 fine troy ounce at 11.5 gross grams. The Bicentennial silver Kennedy uses a separate 0.14789 fine-ounce catalog entry; retain the displayed precision rather than treating those rounded entries as identical.

The silver Eisenhower profile is only for confirmed 40% collector issues: selected 1971-S through 1974-S and 1776–1976-S issues. An S alone does not prove silver; for example, 1973-S proofs exist in clad and silver. Verify the exact issue, composition, and finish before applying the 0.3161 fine-ounce profile.

The 1776–1976 date and design appear on clad as well as silver coins. Only the confirmed silver collector quarter and half belong in these profiles: 0.07395 and 0.14789 fine troy ounce respectively. Do not assign silver content to every Bicentennial coin.

• Eisenhower issue identification ↗
• Kennedy silver date guide ↗

The reduced-weight Seated half dime uses 1.24 gross grams and 0.03588 fine troy ounce. The Seated dime's 1853-standard profile uses 2.49 grams and 0.07205 fine ounce; its 1873-standard profile uses 2.5 grams and 0.07234 fine ounce.

Seated quarters change from the 6.22-gram, 0.17998-fine-ounce profile to 6.25 grams and 0.18084 fine ounce. Seated halves change from 12.44 grams and 0.35996 fine ounce to 12.5 grams and 0.36169 fine ounce. All of these profiles are 90% silver.

The catalog's earlier and later ranges overlap in transition years. For an 1873 quarter, the with-arrows issue uses the later profile, while the no-arrows issue uses the earlier one. Establish the actual weight-standard issue rather than selecting a row solely because its date range includes the year.

The twenty-cent piece is a distinct denomination: 5 gross grams and 0.14468 fine ounce. The Seated dollar uses 26.73 grams and 0.77345 fine ounce; the heavier Trade dollar uses 27.22 grams and 0.7874 fine ounce. Neither a shared Liberty design nor a $1 face value establishes a shared metal weight.

The catalog's 1992–2018 silver proof dime, quarter, and Kennedy half profiles are 90% silver. Their fine-ounce values are 0.07234, 0.18084, and 0.36169 respectively. Ordinary clad proof versions must be excluded.

For confirmed 2019-and-later .999 silver proofs, the dime uses 2.537 gross grams and 0.08148 fine ounce; the quarter uses 6.343 grams and 0.20373 fine ounce; the half uses 12.685 grams and 0.40742 fine ounce.

Identify the silver proof issue and its date before selecting the period. Do not infer composition from a shiny surface, an S mintmark, or the word proof alone. Do not multiply these fine-ounce values by 0.90 or 0.999 again.

The 1983–2018 90% modern commemorative dollar profile uses 26.73 gross grams and 0.77345 fine troy ounce. The 2019-and-later .999 profile keeps 26.73 gross grams but contains 0.85853 fine ounce; the higher purity changes the contained-silver total.

The 1982 George Washington commemorative half is its own 90% silver profile: 12.5 gross grams and 0.36169 fine ounce. Its half-dollar denomination does not make every modern commemorative half a silver coin.

The 2019 Apollo 11 five-ounce silver dollar uses 5 fine troy ounces. The common Apollo design is also used on a smaller dollar; confirm the five-ounce format before applying this profile. Face value and design are not weight measurements.

Proof, uncirculated, and other collector finishes may require different comparable sales. A metal calculation supplies the silver-content reference, not the price for a collectible commemorative.

The historical Morgan dollar group (1878–1921) and Peace dollar group (1921–1935) use 26.73 gross grams, 90% silver, and 0.7734 fine troy ounce in this catalog. These ranges describe series spans, not a guarantee of production in every year.

Modern Morgan and Peace profiles (2021–Date) instead use 26.686 gross grams, 99.9% silver, and 0.858 fine troy ounce. Familiar portraits and a $1 denomination do not make them the historical weight profile.

A contained-metal estimate is not an appraisal, a guaranteed offer, or the total collector value. Date, mintmark, finish, authenticity, condition, and an established variety can affect relevant sales. A photographed example does not establish those features for another coin.

Before using results, record the exact issue, separate mixed compositions and weight periods, calculate from the supplied fine-ounce figure, and retain precision until the final cents. Research comparable sales for the same identified issue and condition; do not invent a rarity or premium from a date range alone.