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Troy Ounce to Gram

ozt
Gram (g)
g

g = ozt × 31.1035

Quick Reference: Troy Ounce to Gram

oztg
0.13.1103
0.515.5517
131.1035
262.207
5155.5174
10311.0348

How to Convert Troy Ounce to Gram

Formula:

g = ozt × 31.1035

Example:

1 ozt = 31.1035 g

  1. Enter the value in Troy Ounce you want to convert
  2. The result is calculated automatically
  3. Copy your result in Gram or continue converting

About Troy Ounce and Gram

The troy ounce is the world standard unit for precious metals. One troy ounce equals exactly 31.1034768 grams — heavier than the avoirdupois ounce (28.35 g) used for everyday goods. Gold, silver, platinum, and palladium prices are always quoted per troy ounce.

Common Uses for This Conversion

Used by gold and silver investors converting international bullion prices to grams, jewelers purchasing precious metals, coin collectors, refineries, and commodity traders. Essential when comparing gold prices per gram versus per troy ounce.

💡Did You Know?

The troy ounce dates to Troyes, France — a major medieval trading hub. It has been the global precious-metal standard for over 500 years, surviving the worldwide shift to the metric system.

Frequently Asked Questions

One troy ounce equals exactly 31.1034768 grams. This is the precise NIST definition, used globally for gold, silver, platinum, and palladium pricing. Note: the avoirdupois ounce (used for food, parcels, etc.) is lighter at 28.3495 grams.
100 grams equals approximately 3.2151 troy ounces (100 ÷ 31.1034768). This is a common calculation for bullion investors tracking gold bar weights, since gold bars are often sold in 1 oz, 10 oz, or 100 g sizes.
The troy ounce (31.10 g) and the avoirdupois ounce (28.35 g) originate from different historical weight systems. The troy system is derived from Troyes, France and has been used for precious metals for over 500 years. Everyday goods (food, parcels) use the avoirdupois system. A troy ounce is about 9.7% heavier than a regular ounce.
One troy ounce of gold weighs exactly 31.1034768 grams. Gold is always priced per troy ounce internationally (e.g., $2,000/ozt). If gold is priced at $2,000 per troy ounce, 31.1 grams of gold = $2,000. Per-gram price = $2,000 ÷ 31.1034768 ≈ $64.30/gram.

Related Conversions

Kilogram → PoundPound → KilogramGram → OunceOunce → GramKilogram → StoneStone → KilogramGram → Troy OunceCarat (gemstone) → GramGram → Carat (gemstone)Grain → GramGram → GrainPennyweight → GramGram → Pennyweight

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