Troy Ounces to Grams Mass Converter
Common Conversions
| oz t | g |
|---|---|
| 0.1 | 3.11 |
| 0.5 | 15.552 |
| 1 | 31.103 |
| 2 | 62.207 |
| 5 | 155.517 |
| 10 | 311.035 |
| 25 | 777.587 |
| 50 | 1555.174 |
| 100 | 3110.348 |
| 1000 | 31103.48 |
Why this conversion matters in chemistry
Exploration geochemistry is a place this matters. A 1.000 troy oz gold sample on an exploration assay report converts to 31.103 g via 1 ozt = 31.10348 g exact — the mass weighed from a pulverized rock-chip composite before aqua-regia digestion and ICP-MS analysis for a JORC or NI 43-101 resource estimate. The factor is exact through the historical troy-pound definition. Used at the boundary between precious-metals trading conventions and the SI-mass form analytical chemistry routinely uses.
Formula
g = oz t × 31.1035
Worked Examples
1 oz t = 31.103 g
One troy ounce — about a typical Pd or Pt catalyst aliquot.
0.032 oz t = 1 g
About one gram in troy ounces — the inverse anchor.
10 oz t = 311.035 g
About a bulk precious-metals catalyst purchase.
Frequently Asked Questions
How do I convert troy ounces to grams?
Multiply by 31.1035. One troy ounce = 31.1035 grams exactly. Note that the troy ounce is heavier than the avoirdupois ounce (28.3495 g) used for everyday weighing.
Why is the troy ounce different from the regular ounce?
Troy weight (precious metals) and avoirdupois weight (everything else) are separate historical systems. A troy ounce (31.103 g) is about 10% heavier than an avoirdupois ounce (28.350 g).
When do chemists encounter troy ounces?
Precious metal catalysts (Pd, Pt, Au, Rh) are priced and sometimes shipped by the troy ounce. Converting to grams is the routine first step before any catalyst-loading or stoichiometry calculation.