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Message:: [QUOTE="-jeffB, post: 24591068, member: 27832"]Coinflation bases their calculations on full weight, 0.7234 ounces of silver per dollar face value. The "standard" multiplier to allow for wear is 0.715, so it assumes a weight loss of about 1.2%. I studied this and weighed a good number of coins back when I joined CoinTalk, ten years or so ago. I found that even coins worn down to F lose very little weight. I think the most underweight coin I ever weighed was a slick Barber dime; it weighed just about two grams, a loss of 20%. It wasn't uncommon to find heavily-worn Barber dimes that were down 10%; I even found a few slick SLQs that were down almost that much. I think the lightest half I ever weight was down less than 10%, though. In general, wear is something that happens to a coin's surface area, and weight is proportional to volume -- and volume goes up as the cube of length/width/thickness, while surface area goes up as the square. So the larger the denomination, the less of the coin's volume gets rubbed off at a given level of wear. Dimes lose the most weight, and halves and dollars lose the least. Actually, I guess half-dimes and three-cent silvers would lose weight even more rapidly. But I'd still be happy to pay the full standard face-value multiplier for those if I ever found someone selling at that price. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie11" alt=":rolleyes:" unselectable="on" unselectable="on" />[/QUOTE]