How much does a dollar coin weigh?
A U.S. dollar coin weighs 8.1 grams (0.286 ounces), according to the U.S. Mint.
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| Spec | Value |
|---|---|
| Weight | 8.1 g (0.286 oz) |
| Diameter | 26.49 mm (1.043 in) |
| Thickness | 2 mm (0.079 in) |
| Composition | 88.5% copper, 6% zinc, 3.5% manganese, 2% nickel (manganese-brass clad) |
| Edge | Lettered |
| Face value | $1 |
| Dollar coins per pound | about 56 |
| Dollar coins per kilogram | about 123.5 |
The U.S. Mint lists the dollar coin at 8.1 grams (0.286 oz). It is 88.5% copper, 6% zinc, 3.5% manganese, 2% nickel (manganese-brass clad), 26.49 mm (1.043 in) across and 2 mm (0.079 in) thick, with a lettered edge.
Because each coin weighs 8.1 g, 100 dollar coins ($100) weigh 810 g (28.57 oz, 1.786 lb), and a roll of 25 weighs 202.5 g (7.14 oz, 0.446 lb). About 56 dollar coins make a pound, and 123.5 make a kilogram.
Frequently asked questions
How much does a dollar coin weigh in grams?
8.1 grams, or 0.286 ounces.
What is a dollar coin made of?
88.5% copper, 6% zinc, 3.5% manganese, 2% nickel (manganese-brass clad), according to the U.S. Mint.
How big is a dollar coin?
26.49 mm (1.043 in) across and 2 mm (0.079 in) thick.
How many dollar coins weigh a pound?
About 56 (453.59 g divided by 8.1 g).
How much do $100 in dollar coins weigh?
100 coins weigh 810 g (28.57 oz, 1.786 lb).
Sources: U.S. Mint, Coin Specifications. Checked 2026-11-12. Figures described as "about" or "roughly" are arithmetic on these sources.
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General information only. Weights, sizes and counts come from the sources shown on each page and may change; check with your bank or the issuer before you rely on them. Nothing here is financial advice.