Ounces to Grams Converter

Convert ounces to grams instantly. Free online oz to g calculator—multiply by 28.3495. For cooking, postage, and nutrition labels.

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How to Convert Ounces to Grams

To convert ounces to grams, multiply the number of ounces by 28.3495. This conversion factor is based on the international avoirdupois ounce, which is the standard ounce used in the United States and most other countries.

Conversion Formula:

value * 28.3495

Conversion Examples

Example: 1 oz to grams

1 × 28.3495 ≈ 28.35 g

1 ounce ≈ 28.35 grams

Standard food ounce.

Example: 4 oz to grams

4 × 28.3495 ≈ 113.4 g

4 ounces ≈ 113.4 grams

Common serving size.

Conversion Chart

Ounces	Grams
1	28.3495
2	56.699
4	113.398
8	226.796
16	453.592
32	907.184

Conversion Formula

The formula to convert ounces to grams is:

ounces × 28.3495 = grams

Mathematically, you can write this as:


ounces × 28.3495 grams/ounce = grams

The ounce units cancel out, leaving you with grams.

Quick Conversion Tip

Quick conversion: Multiply ounces by 28.35 (approximately) to get grams. For example, 1 ounce ≈ 28.35 grams, 8 ounces ≈ 227 grams, 16 ounces ≈ 454 grams.

Unit Definitions

Ounce (oz)

An ounce is an imperial unit of mass. The avoirdupois ounce, used in the United States and most countries, equals approximately 28.3495 grams.

1 ounce = 28.3495 grams = 0.0625 pounds = 0.0283495 kilograms

Gram (g)

A gram is a metric unit of mass equal to one thousandth of a kilogram. It is widely used in science, cooking, and everyday measurements.

1 gram = 0.001 kilograms = 1000 milligrams = 0.035274 ounces

Common Use Cases

Baking with metric scales.
Supplement and nutrition facts.
Small parcel weight in grams.
Import/export product weights.

Understanding the Conversion

Ounces to grams: 1 oz = 28.349523125 g (avoirdupois). Inverse of g→oz; vital for metric recipes and EU labels.

1 oz ≈ 28.35 g.

Baking with metric scales. The table and FAQ on this page walk through the factor if you need it.

FAQs

How many grams in an ounce?

About 28.35 grams per ounce.

How do I convert oz to g?

Multiply ounces by 28.3495.

Is a troy ounce the same?

No—troy oz ≈ 31.1 g; this page is avoirdupois.