Convert Ounces to Grams

To convert ounces (oz) to grams (g), use this rule:

• 1 ounce = 28.349523 grams

Conversion formula

• grams = ounces × 28.349523

Quick examples

• 2 oz × 28.349523 = 56.699 g
• 5 oz × 28.349523 = 141.748 g
• 10 oz × 28.349523 = 283.495 g

Tip: For a fast estimate in cooking, use 1 oz ≈ 28.35 g.

How many grams are in an ounce?

One ounce (oz) equals 28.349523125 grams (g). In most cooking and everyday use, people round this to 28.35 g per oz.

How many grams are in 1 oz?

1 oz = 28.3495 g (about 28.35 g when rounded).

How many grams are in 2 oz?

2 oz = 56.699 g (about 56.70 g).

How many grams are in 3 oz?

3 oz = 85.0486 g (about 85.05 g).

How many grams are in 4 oz?

4 oz = 113.3981 g (about 113.40 g).

How many grams are in 5 oz?

5 oz = 141.7476 g (about 141.75 g).

How many grams are in 8 oz?

8 oz = 226.7962 g (about 226.80 g). This is also half a pound.

How many grams are in 16 oz?

16 oz = 453.5924 g (about 453.59 g). This equals 1 pound.

How do you convert ounces to grams?

Use this formula:
grams = ounces × 28.349523125
For quick math in the kitchen, you can use 28.35 as the factor.

How do you convert grams to ounces?

Use this formula:
ounces = grams ÷ 28.349523125
A quick rule is 1 g ≈ 0.0353 oz.

Are there different types of ounces?

Yes. The two common types are:

• Avoirdupois ounce (oz): used for most weights in the US (food, packages). 1 oz = 28.3495 g.
• Troy ounce (ozt): used for precious metals. 1 ozt = 31.1035 g.

Is a fluid ounce the same as an ounce in grams?

No. A fluid ounce (fl oz) measures volume, not weight. Grams measure weight. To convert fluid ounces to grams, you must know the ingredient’s density. For water, 1 fl oz ≈ 29.57 g.

Why do ounces to grams conversions vary in some recipes?

Recipes may use:

• Rounded numbers (like 28 g or 30 g per oz)
• Different ounce types (avoirdupois vs troy)
• Ingredient volume swaps (fl oz vs oz)

For best results, use 28.35 g per oz for standard weight.

What’s the quickest way to estimate ounces to grams?

Use these easy estimates:

• 1 oz ≈ 28 g
• 2 oz ≈ 57 g
• 4 oz ≈ 113 g
• 8 oz ≈ 227 g
• 16 oz ≈ 454 g

These are close enough for many cooking tasks.

How many grams are in an ounce of gold?

Gold is often measured in troy ounces.
1 troy ounce (ozt) = 31.1035 g.

Do US and UK ounces convert the same way?

For weight, the standard ounce is the same conversion: 1 oz = 28.3495 g. Most differences come from fluid ounces and serving terms, not the weight ounce.

How many grams are in a quarter ounce?

A quarter ounce is 0.25 oz.
0.25 oz = 7.0874 g (about 7.09 g).

How many grams are in a half ounce?

A half ounce is 0.5 oz.
0.5 oz = 14.1748 g (about 14.17 g).