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<p>[QUOTE=&quot;Oldhoopster, post: 7419340, member: 84179&quot;]You can get a good estimate of the %off center using the following method.</p><p><br /></p><p>Look up or measure the standard diameter of the coin. For a dime it&#039;s 17.91 mm.</p><p><br /></p><p>Measure the distance along the diameter from the rim to the edge of the edge of the design (over the unstruck part).&nbsp; Don&#039;t measure the length of the struck portion since it can be distorted</p><p><br /></p><p>Plug them into the following formula</p><p><br /></p><p>1 - [(17.91- Measured distance)/17.91] </p><p><br /></p><p>Your measurement should be in millimeters for this formula</p><p><br /></p><p>Multiply by 100 to get the percentage and round to the nearest 5% (off centers are usually reported to the nearest 5% or 10%)</p><p><br /></p><p>If you don&#039;t subtract from 1, you&#039;ll calculate the % ON center</p><p><br /></p><p>Better living through mathematics <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie12" alt="o_O" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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