Ounces to Grams Converter

Instantly calculate! Your online conversion tool always at hand to easily convert ounces to grams. Perfect for cooking, baking, postal weighing, and international recipes. Simply enter your value and get accurate results immediately.

How to Convert Ounces to Grams

grams = ounces × 28.3495

1 oz = 28.3495 g
1 g = 0.03527 oz

Example: convert 8 oz to grams:
8 oz = 8 × 28.3495 = 226.796 g

Ounces to Grams

Value:

Convert to:

From ounces to grams

28.3495

1 oz = 28.3495 g

Quick Conversion Table

Ounces	Grams
1	28.3495
2	56.699
3	85.0486
4	113.398

Ounces	Grams
5	141.748
8	226.796
10	283.495
12	340.194

Ounces	Grams
16	453.592
32	907.185

About the Units

Ounce (oz)

The ounce (oz) is a unit of mass in the imperial and US customary systems. The avoirdupois ounce, the most commonly used ounce today, is defined as exactly 28.349523125 grams. It is widely used in the United States and United Kingdom for measuring food portions, postal weights, and packaged goods. There are 16 ounces in one pound.

Gram (g)

The gram (g) is a metric unit of mass equal to one thousandth of a kilogram. Originally defined as the mass of one cubic centimeter of water at 4 °C, it is now derived from the kilogram, the SI base unit of mass. Grams are used worldwide in cooking, science, nutrition labeling, and everyday commerce for measuring small quantities.

Frequently Asked Questions

How many grams in an ounce?

One ounce equals exactly 28.349523125 grams, commonly rounded to 28.3495 g for most practical purposes.

How to convert oz to g?

To convert ounces to grams, multiply the ounce value by 28.3495. For example, 5 oz = 5 × 28.3495 = 141.748 g.

What is 8 oz in grams?

8 ounces equals 226.796 grams (8 × 28.3495). This is equivalent to one US cup for many liquid ingredients.

What is 16 oz in grams?

16 ounces equals 453.592 grams. Since 16 oz = 1 pound, this is also the gram equivalent of one pound.

How many oz in 100g?

100 grams equals approximately 3.527 ounces (100 ÷ 28.3495).

Is 1 oz exactly 28g?

Not exactly. One avoirdupois ounce equals 28.349523125 grams, so 28 g is a rough approximation. For precise measurements, use 28.3495 g.

What is a troy ounce in grams?

A troy ounce, used for precious metals like gold and silver, equals 31.1035 grams, which is heavier than the standard avoirdupois ounce (28.3495 g).

How many grams in a quarter ounce?

A quarter ounce (0.25 oz) equals approximately 7.087 grams (0.25 × 28.3495).

Why do recipes use ounces?

Recipes in the US and UK traditionally use ounces because these countries adopted the imperial measurement system. Many professional bakers prefer grams for greater accuracy, especially in baking where precision matters.

Quick way to estimate oz to grams?

A simple mental trick: multiply the ounces by 28, then add about 1% more. For example, 10 oz × 28 = 280, plus ~3 = 283 g (actual: 283.495 g). Close enough for everyday use!