Ounces to Grams Converter

What is an Ounce?

An ounce (oz) is a unit of weight commonly used in the United States and other countries that follow the imperial system. There are two types of ounces you might encounter:

• Standard ounce (avoirdupois): Used for most everyday items, like food or parcels.
• Troy ounce: Used for measuring precious metals like gold and silver.

1 standard ounce = 28.3495 grams
1 troy ounce = 31.1035 grams

What is a Gram?

A gram (g) is a metric unit of mass. It's the most widely used unit for weighing small quantities of food, medicine, and ingredients in scientific contexts. The metric system is standard in most countries outside the United States.

1 kilogram = 1,000 grams

1 gram = 1/1,000 of a kilogram

How to Convert Ounces to Grams

Converting ounces to grams is straightforward once you know which type of ounce you're working with.

If you're measuring everyday items like flour, sugar, or packaged goods, you're likely using standard (avoirdupois) ounces. But if you're dealing with gold, silver, or other precious metals, you're using troy ounces, which are slightly heavier.

To make the conversion:

• Use 28.3495 when converting from standard ounces
• Use 31.1035 when converting from troy ounces

• Grams = Ounces × 28.3495 (for regular items)
• Grams = Ounces × 31.1035 (for precious metals)

Examples:

Let's say you're following a recipe from the U.S. that lists 8 ounces of flour. To convert that to grams:

8 * 28.3495 = 226.796 grams

You'd round that to about 227 grams for simplicity. That is the amount you would measure if your kitchen scale only shows metric units.

Now imagine you're checking the weight of 2 troy ounces of gold for investment purposes:

2 * 31.1035 = 62.207 grams
So, 2 troy ounces equals roughly 62.21 grams.

These conversions help you when:

• Switch between U.S. and international recipes
• Track your food portions more precisely
• Understand the actual weight of jewelry or bullion
• Work with product specifications listed in different systems

Ounces (oz) to Grams (g) Conversion Table