how much does a silver kennedy half dollar weigh

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The weight of a silver Kennedy half dollar is dependent upon its year of mintage, as the metallic composition changed over time. The search context indicates that there are two distinct periods during which these coins contained silver.

The first silver version, minted exclusively in 1964, was composed of 90% silver. The provided information specifies that these particular coins contain 0.3617 troy ounces of pure silver. The total standard weight for a 1964 Kennedy half dollar is 12.5 grams.

Following this initial issue, from 1965 to 1970, the composition was altered to a 40% silver-clad planchet. These later silver-containing coins have a slightly lower total weight of 11.5 grams. Kennedy half dollars produced for general circulation from 1971 onward contain no silver and consist of a copper-nickel clad composition, thus their weight is not relevant to the query about silver versions.