Convert ounces to grams

Ounce

An ounce is a US customary and imperial mass unit equal to one sixteenth of a pound.

Ounces are common in US food packaging, recipes, parcels, postal weights, and smaller product specifications.

Gram

A gram is a metric mass unit equal to one thousandth of a kilogram.

Grams are widely used for food, packaging, recipes, lab work, parcels, and small product weights.

How to Convert Ounce to Gram

Mathematically, gram (g) = ounce (oz) multiplied by the conversion factor shown below.

1 oz = 28.349523 g

1 g = 0.035274 oz

1 oz x 28.349523 = 28.349523 g

The mass in gram (g) is the mass in ounce (oz) multiplied by 28.349523.

mass_(g) = mass_(oz) x 28.349523

Or:

g = oz x 28.349523

Formula: value × 28.349523125

Example: 15 oz = 425.242847 g

1. Start with the mass in ounces (oz).
2. Multiply by 28.349523125 to convert ounces into grams.
3. Use grams when the result needs to match metric labels, kitchen scales, or product specifications.

Precision note: Use 28.349523125 grams per ounce. Round according to the scale, label, or recipe precision after calculating with the exact factor.

How many oz in g and g in oz

1 oz = 28.349523 g

1 g = 0.035274 oz

If you are starting with gram instead, use the grams to ounces page.

Common Use Cases for oz to g

• Converting recipe ingredients from ounces to grams.
• Checking food, parcel, jewelry, or small product weights in metric units.
• Preparing labels or product pages for metric readers.
• Comparing US customary package weights with gram-based scales.

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