Convert between grams, troy ounces, kilograms and standard ounces. Useful for coins, bars and bullion listings.
Remember: bullion normally uses troy ounces, not standard ounces.
Bullion is normally priced in troy ounces. One troy ounce is 31.1034768g, while a standard ounce is about 28.3495g.
A troy ounce is the weight unit normally used for gold, silver and other precious metals. One troy ounce equals 31.1034768 grams. This is different from a standard ounce, which is about 28.3495 grams.
When a bullion coin is described as 1oz, it almost always means one troy ounce.
Common gold weights include 1g, 5g, 10g, 1 troy ounce, 100g, 250g and 1kg bars. Coins such as sovereigns and fractional Britannias use their own specific weights, so converting between grams and troy ounces helps compare items more accurately.
Use these tools alongside the Bullion Tracker coin and bar database.
One troy ounce is 31.1034768 grams.
No. A troy ounce is heavier than a standard ounce.
Troy ounces are the traditional weight unit for precious metals.
Yes. The converter works for grams, kilograms, troy ounces and standard ounces.
Last updated: 04 June 2026. Spot prices are provided for educational and tracking purposes only and may be delayed. Always check live dealer prices before buying or selling bullion.