How to Measure Dimes: Dimensions, Weight, Thickness, and Tool Buying Guide
No manufacturing run produces millions of pieces without tiny variances. The United States Mint operates under legal weight tolerance standards. For modern cupronickel clad dimes, the legal tolerance is ±0.091 grams. This creates an acceptable weight window ranging from 2.177 grams to 2.359 grams for uncirculated strikes.
For 90% silver dimes, the statutory tolerance sits at ±0.097 grams, yielding an uncirculated acceptance range of 2.403 grams to 2.597 grams. The table below outlines how these specifications contrast across primary historic varieties and production anomalies.
| Coin Series & Era | Alloy Breakdown | Target Weight | Allowable Tolerance | Diameter / Thickness |
|---|---|---|---|---|
| Roosevelt Clad (1965, Present) | 91.67% Cu, 8.33% Ni | 2.268 g | 2.177 g, 2.359 g | 17.91 mm / 1.35 mm |
| Roosevelt Silver (1946, 1964) | 90% Ag, 10% Cu | 2.500 g | 2.403 g, 2.597 g | 17.91 mm / 1.35 mm |
| Mercury Head (1916, 1945) | 90% Ag, 10% Cu | 2.500 g | 2.403 g, 2.597 g | 17.91 mm / 1.35 mm |
| Cent Planchet Error (Wrong Blank) | Copper / Zinc Core | 2.50 g or 3.11 g | Variable (Depends on blank) | 19.05 mm (Spread / Cropped) |
Tags:
