> A bullion silver ounce contains 31.1035 g of fine silver (fineness 999 or 9999). Its buyback value is the fine weight times the day's spot price, plus a pr *Source : https://meilleur-rachat-argent.fr/en/guides/silver-ounce-coin-value/* --- ● Guide # Silver ounce coin: value, spot price and buyback Published on **20/07/2026** · By **Sébastien Joumel** In brief A bullion silver ounce contains **31.1035 g of fine silver** (fineness 999 or 9999). Its buyback value is the fine weight times the day's spot price, plus a premium that varies with the coin. ## What a silver ounce really is Here, "ounce" means the **troy ounce**, the reference unit for precious metals: exactly 31.1035 g. A one-ounce bullion silver coin therefore weighs about 31.1 g and carries a very high fineness: 999 (three nines) or 9999 (four nines) depending on the coin. The term "silver ounce" applies equally to the Maple Leaf, American Eagle, Vienna Philharmonic, Britannia and Silver Krugerrand, all of which weigh one ounce. Do not confuse it with older French coins (50 F Hercule, 5 F Semeuse), struck in 900 or 835 silver with different weights. The silver ounce is a **modern investment product**: its interest lies in its metal content, not in numismatic rarity. ## How its value is calculated The metal value follows a simple rule: **fine weight × the day's silver price**. The fine weight of a 999 ounce is 31.1035 g × 0.999 ≈ 31.07 g of pure silver; at 9999 it is almost equal to the total weight. The world spot price is the same for everyone, quoted per troy ounce and converted into a price per gram. What differs from one buyer to another is not the spot price but the **applied margin**. To assess an offer, compare the quoted price with the fine weight times the current spot. Our [silver buyback](https://meilleur-rachat-argent.fr/en/silver-buyback/) page lets you put local professionals in competition. ## Premium, quotation and buyback Beyond the metal, an ounce may carry a **premium**: the gap between its price and its pure metal value. This premium depends on the coin (some are more sought after), its condition and market conditions. Bullion coins usually trade close to the metal, with a moderate premium, unlike collector coins whose numismatic premium can be higher. At buyback, a professional identifies the coin, checks its weight and fineness, then applies its schedule. Payment is made by bank transfer or cheque above legal cash limits, with ID and register entry. To choose between several coins, see our guide on [silver bullion coins](https://meilleur-rachat-argent.fr/en/guides/silver-bullion-coins/). ## Frequently asked questions How much does a silver ounce weigh? One troy ounce is exactly 31.1035 g. A one-ounce bullion silver coin therefore weighs about 31.1 g, with a fineness of 999 or 9999. Is a silver ounce bought back at the world spot price? The world spot price is the same for everyone. The buyback price equals the fine weight times that spot, less the professional's margin, and sometimes plus a coin premium. ## Read also [ Guide 10 francs silver coins (Turin, Hercule): buyback value ](https://meilleur-rachat-argent.fr/en/guides/10-francs-silver-coin/)[ Guide 5 francs silver coins (Semeuse, Hercule): metal value ](https://meilleur-rachat-argent.fr/en/guides/5-francs-silver-coin/)[ Guide 50 francs Hercule silver coin: weight, value, buyback ](https://meilleur-rachat-argent.fr/en/guides/50-francs-hercule-silver-coin/) ## Sell at the best price near you Compare the silver buyers in your city. [See the rankings](https://meilleur-rachat-argent.fr/en/silver-buyback/)