Grams to Troy Ounces Converter

What is a grams to troy ounces converter?

A grams to troy ounces converter changes a mass expressed in grams (g) into the equivalent mass in troy ounces (ozt). The troy ounce is the standard unit for weighing precious metals such as gold, silver, platinum, and palladium, so this conversion is the one you reach for when reading bullion prices, valuing coins, or checking the weight of jewelry.

This tool works in both directions: enter a value in grams to see troy ounces, or enter troy ounces to see grams. The relationship is fixed, so every conversion is exact to the defined factor.

Background: the troy ounce

The troy ounce takes its name from the French city of Troyes, an important medieval trading center. Unlike the everyday avoirdupois ounce used for food and general goods, the troy ounce is heavier: one troy ounce equals exactly 31.1034768 grams, while an avoirdupois ounce is about 28.35 grams. Because of this difference, it is important to know which “ounce” a price or weight refers to. In the bullion market, “ounce” almost always means the troy ounce.

Formula

One troy ounce is defined as exactly 31.1034768 grams, so dividing grams by that factor gives troy ounces:

$\text{troy ounces} = \frac{\text{grams}}{31.1034768}$

To go the other way, multiply troy ounces by the same factor:

$\text{grams} = \text{troy ounces} \times 31.1034768$

How to convert grams to troy ounces

1. Take the mass in grams that you want to convert.
2. Divide that number by 31.1034768, because 1 ozt = 31.1034768 g.
3. The result is the equivalent mass in troy ounces.

The base factor to remember is that 1 troy ounce equals 31.1034768 grams. Reversing it, 1 gram equals about 0.0322 troy ounces.

Worked examples

Example 1: 31.1034768 grams to troy ounces

$31.1034768 \text{ g} = \frac{31.1034768}{31.1034768} = 1 \text{ ozt}$

So 31.1034768 grams is exactly 1 troy ounce.

Example 2: 100 grams to troy ounces

$100 \text{ g} = \frac{100}{31.1034768} \approx 3.2151 \text{ ozt}$

So 100 grams is about 3.2151 troy ounces.

Example 3: 5 troy ounces to grams

$5 \text{ ozt} = 5 \times 31.1034768 \approx 155.517 \text{ g}$

So 5 troy ounces is about 155.517 grams.

Quick reference table

Practical notes

• The troy ounce is used only for precious metals. For food, mail, and most everyday weighing you want the avoirdupois ounce instead — see the grams to ounces converter.
• Spot prices for gold and silver are quoted per troy ounce, so converting a gram weight to troy ounces lets you estimate value directly from the market price.
• If you are working with larger metric weights, the grams to kilograms converter handles bulk quantities.

FAQ

How many grams are in a troy ounce?

There are exactly 31.1034768 grams in one troy ounce. This value is fixed by definition, so the conversion involves no rounding at the source.

Is a troy ounce the same as a regular ounce?

No. A troy ounce (31.1034768 g) is heavier than a standard avoirdupois ounce (about 28.35 g). The troy ounce is reserved for precious metals, while the avoirdupois ounce is used for everyday weights.