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One troy pound equals exactly 14.583333 avoirdupois ounces (or 14 7/12 ounces). This is because a troy pound contains 12 troy ounces, and each troy ounce weighs 1.21528 avoirdupois ounces. The troy pound is heavier than an avoirdupois pound (which is only 16 avoirdupois ounces), which confuses many people. For practical conversions: multiply troy pounds by 14.583333 to get avoirdupois ounces, or divide avoirdupois ounces by 14.583333 to get troy pounds.

Troy weight was chosen for precious metals because it provides better precision for high-value items where small weight differences mean significant money. The troy system divides pounds into 12 ounces (instead of 16), allowing for easier fractional calculations historically. Troy weight became standardized for precious metals through centuries of international trade, particularly in London's bullion markets which established global pricing conventions. Today, using troy weight for precious metals is legally mandated in most countries and ensures consistency across international markets where gold, silver, and other precious metals are traded.