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Grams to Troy Ounces Mass Converter
↔ Convert oz t to g instead

Common Conversions

g oz t
0.1 0.00322
0.5 0.01608
1 0.03215
2 0.0643
5 0.16075
10 0.32151
25 0.80377
50 1.60754
100 3.21507
1000 32.1507

Why this conversion matters in chemistry

Precious-metal catalyst inventory at a pharma R&D site is weighed in grams on the analytical balance — a 10 g charge of 5% Pd/C for a Suzuki coupling carries 0.5 g of Pd metal. The recovery vendor that buys back spent catalyst credits the customer in troy ounces against the LBMA fix. 0.5 g of Pd works out to 0.01608 troy oz, the line item on the reclamation invoice. The multiplier of 0.032151 ozt per g comes from the 1959 international troy-ounce definition, 1 ozt = 31.1034768 g. The troy ounce never appears in chemistry data; it lives in the procurement layer where catalyst metal is a commodity.

Formula

oz t = g × 0.032151

Worked Examples

31.103 g = 1 oz t

One troy ounce in grams — the conversion anchor in reverse.

0.5 g = 0.01608 oz t

The Pd recovered from a spent 10 g charge of 5% Pd/C.

100 g = 3.215 oz t

100 g of precious-metal catalyst priced for procurement.

Frequently Asked Questions

How do I convert grams to troy ounces?
Multiply by 0.032151, or equivalently divide by 31.1035. So 100 g becomes 3.215 ozt. The factor is exact through the 1959 international agreement on the troy ounce.
How does the troy ounce differ from the avoirdupois ounce?
The troy ounce is 31.1035 g; the avoirdupois ounce (used for everything else in the US system) is 28.3495 g — about 10% lighter. Mixing them up overstates or understates a precious-metal balance by roughly that 10%.
Why do precious metals use a separate ounce?
The troy system predates the avoirdupois system in European trade and was retained for precious metals after the avoirdupois system took over for general use. The convention is universal in metals trading, so all gold, silver, platinum, and palladium spot prices quote per troy ounce.