The weight of a gold coin can vary considerably, ranging from small fractions of a gram to over a kilogram.
However, the most commonly encountered size for gold bullion coins is one troy ounce. A troy ounce, a unit of measurement specific to precious metals, is heavier than a standard (avoirdupois) ounce. One troy ounce is equal to 31.1034768 grams, [according to The Royal Mint].
Therefore, if you are referring to gold coins in the most popular one troy ounce weight, the answer is approximately 31.1 grams.
It is important to remember that fractional gold coins are also available in sizes like 1/10 oz, 1/4 oz, and 1/2 oz, which weigh proportionally less. Some examples of weights and denominations of various gold coins are provided in the table below.
| Hallmark | Denomination | Gold Content | Weight | Diameter | Thickness |
|—|—|—|—|—|—|
| American Eagle 1 Ounce | 50 USD | 916 | 33.930 g | 32.70 mm | 2.75 mm |
| [American Eagle ½ Ounce] | 25 USD | 916 | 16.965 g | 27.00 mm | 2.24 mm |
| American Eagle ¼ Ounce | 10 USD | 916 | 8.483 g | 22.00 mm | 1.83 mm |
| [American Eagle 1/10 Ounce] | 5 USD | 916 | 3.393 g | 16.5 mm | 1.19 mm |
| [American Buffalo 1 Ounce] | 50 USD | 999.9 | 31.103 g | 32.70 mm | 2.95 mm |
| [American Buffalo ½ Ounce] | 25 USD | 999.9 | 15.55 g | 26.50 mm | 2.16 mm |
| American Buffalo ¼ Ounce | 10 USD | 999.9 | 7.78 g | 22.00 mm | 1.63 mm |
| [American Buffalo 1/10 Ounce] | 5 USD | 999.9 | 3.11 g | 16.50 mm | 1.19 mm |
| Canadian Maple Leaf 1 oz | 50 CAD | 999.9 | 31.103 g | 30 mm | 2.87 mm |
| [Canadian Maple Leaf 1/10 oz] | 5 CAD | 999.9 | 3.110 g | 16 mm | 1.13 mm |
| [Chinese Panda 1 oz] | 100 Yuan / 500 Yuan | 999 | 31.103 g | 32.05 mm | 2.70 mm |
| [Chinese Panda 1/10 oz] | 10 Yuan / 50 Yuan | 999 | 3.110 g | 17.39 mm | 1.05 mm |
| [Vienna Philharmonic 1 Ounze] | 2,000 ÖS/100 € | 999.9 | 31.103 g | 37.0 mm | 2.0 mm |
| Vienna Philharmonic 1/10 Ounze | 200 ÖS/10 € | 999.9 | 3.121 g | 16.0 mm | 1.2 mm |
- [
US Mint 1/2 oz American Eagle Coin BU Random Year $1,908.11]
- [
US Mint 1/10 oz American Eagle Coin BU Random Year $424.90]
- [
2023 1 oz American Buffalo BU, Gold | LCR Coin $3,669.54 5.0 (1)]
- [
1/2 Ounce Buffalo SILVER Round 5.0 (10)]
- [
2008-w American Buffalo Gold 1/10 Oz $5 .999 Ogp Box & Coa $899.99]
- [
1/10 oz Maple Leaf Coin | 2025 $435.82 5.0 (2)]
- [
2015 China Silver Panda -1oz – Proof Like by Collectors Alliance $72.51]
- [
1985 Gold Chinese Panda 1/10 Oz Coin Ms 69 Ngc $480.50]
- [
2023 SILVER AUSTRIA 1.5E VIENNA PHILHARMONIC 1 oz COIN MS69 ICG $50.00]
See more
Table: Gold coins and their weights
How much does a $5 gold coin weigh?
The $5 Liberty Gold Coin is approximately made up of 90% gold, with a weight of 8.359 grams.
Is a $5 gold coin 1/10 of an ounce?
The Gold American Eagle comes in four different sizes and this is the smallest version of this coin. Weighing about a tenth of a troy ounce, it is more modestly-sized than a dime and has a face value of $5.