Is a Dime Exactly 0.705 Inches? Fact-Checking Coin Sizes and Weather Scale Discrepancies

Here is an essential overview about Is a Dime Exactly 0.705 Inches? Fact-Checking Coin Sizes and Weather Scale Discrepancies.

Under official United States Mint coin specifications, every circulating ten-cent piece produced today adheres to strict physical tolerances. The diameter stands at 0.705 inches, which converts mathematically to 17.91 millimeters. Its standard thickness is fixed at 1.35 millimeters (approximately 0.053 inches), and its total weight must register at 2.268 grams.

Engineering these dimensions requires high-pressure stamping presses that strike planchets inside a retaining collar. The collar prevents lateral metal flow and forms the reeded edge count of exactly 118 reeds around the rim. Modern dimes feature a cupronickel composition: an outer cladding composed of 75 percent copper and 25 percent nickel, bonded to an inner core of pure copper. This metallurgic sandwich yields an overall alloy of 91.67 percent copper and 8.33 percent nickel. When collectors use a micrometer or caliper coin measurement on an uncirculated Roosevelt dime, the variance rarely exceeds ±0.002 inches. This rigid standard ensures vending machines and electronic coin discriminators can instantly verify authenticity based on physical size and electromagnetic signature.