Fractional Gold Coins: Half, Quarter and Tenth-Ounce Sizes Explained
Gold bullion coins are best known in their one-ounce size, but most major series also come in smaller denominations: half an ounce, a quarter ounce and a tenth of an ounce. These fractional coins make gold accessible in smaller amounts and offer flexibility when selling. They also cost more per ounce of gold. This guide explains the trade-off and lists the fine gold content of the main fractional coins.
Why fractional coins cost more per ounce
Minting a coin involves fixed costs: preparing the blank, striking, inspecting, packaging and distributing. These costs are similar whether the coin weighs one ounce or a tenth of an ounce. Spread over less gold, they add up to a higher premium per ounce.
In practice, the premium over spot rises as the coin gets smaller. A tenth-ounce coin typically carries a much higher percentage premium than a one-ounce coin of the same series. Dealers’ buy-back prices for fractional coins usually reflect part of that premium, but not always all of it.
Why buyers still choose them
- Smaller budget: they allow gold to be bought in smaller amounts.
- Divisibility: a holder can sell part of a holding without selling a whole ounce.
- Gifts: small coins are popular for birthdays, weddings and similar occasions.
- Recognisability: fractional coins from major mints are as well known as their one-ounce versions.
The choice is a matter of balancing these advantages against the higher cost. A comparison of overall buying approaches is in our guide on how to buy gold coins.
Fine gold content of the main sizes
Fine gold content is set by the coin’s nominal size, whatever its alloy. One troy ounce equals 31.1035 grams.
| Nominal size | Fine gold (troy oz) | Fine gold (grams) |
|---|---|---|
| 1 oz | 1.0000 | 31.1035 |
| 1/2 oz | 0.5000 | 15.552 |
| 1/4 oz | 0.2500 | 7.776 |
| 1/10 oz | 0.1000 | 3.110 |
22-karat coins weigh more than these figures in total because they contain alloy metals; 24-karat coins weigh almost exactly the fine weight.
The main series compared
| Series | Fineness | Fractional sizes | Notes |
|---|---|---|---|
| American Gold Eagle | .9167 (22k) | 1/2, 1/4, 1/10 oz | Face values $25, $10 and $5 |
| Canadian Gold Maple Leaf | .9999 (24k) | 1/2, 1/4, 1/10 oz and smaller | Very small sizes also produced |
| South African Krugerrand | .9167 (22k) | 1/2, 1/4, 1/10 oz | Fractions introduced in 1980 |
| British Gold Britannia | .9999 (24k) | 1/2, 1/4, 1/10 oz and smaller | Fineness was .9167 before 2013 |
| Australian Gold Kangaroo | .9999 (24k) | 1/2, 1/4, 1/10 oz and others | Annual design |
| American Gold Buffalo | .9999 (24k) | Only in 2008 | Normally 1 oz only |
Details of each series are covered in our articles on American Eagle bullion coins, the Canadian Gold Maple Leaf, Krugerrand gold coins, English gold coins and Australian Gold Kangaroo coins.
Historic fractional coins
Before modern bullion coins, gold circulated in many small denominations. British half sovereigns, French 10-franc pieces and US quarter eagles and half eagles are examples. Their gold content is not a round fraction of an ounce, so they need to be valued by their exact fine weight. Older European coins are discussed in European gold coins.
Counterfeits and checking
Small coins are harder to test by weight, since a tiny deviation can be lost in scale tolerance. Buying from established sources matters even more for fractional sizes. Coins in original mint packaging or blister cards can help.
Choosing sizes
Some buyers combine sizes: one-ounce coins for most of a holding, where premiums are lowest, and a few fractional coins for flexibility. Others prefer only one size. Neither approach is right for everyone, and no size is a guarantee of a better return. What matters is knowing exactly how much gold each coin contains and what premium is being paid for it. Current prices and how they translate into coin values are explained in gold prices explained.
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