Precious Metals & Assaying

Troy Ounce vs. Avoirdupois Conversion

The international standard unit of measurement for precious metals (Gold, Silver, Platinum, Palladium). Unlike the standard US/avoirdupois ounce (28.35 g), 1 troy ounce equals exactly 31.1034768 grams.

\[ 1 \text{ oz t} = 31.1034768 \text{ g} = 1.09714286 \text{ oz avdp} = 480 \text{ grains} \]
Plain Text Formula: 1 oz_t = 31.1034768 g = 1.09714 oz_avdp = 480 grains

📐 Variable Definitions & Parameters

Symbol Variable Name Standard Unit Physical Definition
\[ ext{oz t} \] Troy Ounce oz t Standard bullion trade mass unit (480 grains)
\[ ext{oz avdp} \] Avoirdupois Ounce oz Standard grocery/postage ounce (437.5 grains / 28.35 g)
\[ ext{g} \] Grams g Metric mass standard

💡 Worked Engineering Example

Problem Statement:

Convert a 500-gram silver bar into troy ounces.

Step-by-Step Solution:

  1. Divide grams by 31.1034768: 500 / 31.1034768
  2. Result = 16.0754 oz t
🎯 Result: A 500 g silver ingot equals 16.075 troy ounces.
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