Buy 1 Troy Ounce Gold Bars – The International Standard Weight

The 1 troy ounce gold bar (31.1035 grams) is the most internationally recognised gold weight – the same unit in which gold is quoted on the world's spot markets, from the LBMA in London to the COMEX in New York. With 9 products at CelticGold, all in 999.9/1,000 fineness from top refiners, the 1 oz bar is the preferred choice for investors who want maximum global liquidity in a single bar.

History – The Troy Ounce and the Medieval Trade Fair

The troy ounce takes its name from Troyes, a French city in the Champagne region that hosted the great medieval trade fairs of the 12th–14th centuries. At these fairs – attended by merchants from across Europe and the Arab world – a standardised precious metals weight system was established. The troy pound of 12 ounces (versus the 16-ounce avoirdupois pound used for everyday goods) became the universal standard for gold and silver.

Despite the global adoption of the metric system from 1795 onwards, the troy ounce has never been replaced in precious metals trading. The gold price is still quoted universally in US dollars per troy ounce, and the 1 oz bar remains the single most traded unit in the global bullion market.

In the investment era, the 1 oz gold bar gained particular importance alongside the 1 oz gold coin – with Krugerrand, Maple Leaf and Vienna Philharmonic all standardised to exactly this weight.

Key Facts

1 oz Bar vs. 1 oz Coin – The Key Differences

All weights: Gold Bars by Weight. Manufacturers: Gold Bar Manufacturers.

FAQ

Why is the troy ounce still used instead of grams? Tradition and global standardisation. Every major exchange (LBMA, COMEX, TOCOM) quotes gold in troy ounces, and changing this would require simultaneous agreement from every market – impractical after centuries of established practice.

Is a 1 oz gold bar or a 1 oz gold coin better for investors? Bars have slightly lower premiums; coins offer legal tender status and better counterfeit protection through state minting. Both are equally liquid. The choice depends on personal preference.