How many gram is 1 ounce of rolled oats?

1 ounce of rolled oats weighs approximately 28 gram. This is based on a density of 0.34 g/ml for rolled oats.

How do I measure rolled oats accurately?

For the most accurate measurement of rolled oats, use a kitchen scale. Volume measurements can vary based on how the ingredient is packed.

Why should I weigh rolled oats instead of using cups?

Weighing rolled oats gives more consistent results than volume measurements. A cup of rolled oats can vary by 10-20% depending on how it's measured (spooned vs scooped). Professional bakers always weigh ingredients for this reason.

Why does rolled oats have a specific cup-to-gram conversion?

Rolled Oats has a density of 0.34 g/ml, meaning each milliliter weighs 0.34 grams. Different ingredients have different densities—for example, flour is lighter than sugar—which is why each needs its own conversion factor.

Rolled Oats

Ounce to Gram

Ingredient

Amount

From

Result

28g

high confidence USDA source

Rolled Oats — Quick Reference

Common ounce to gram conversions

Rolled Oats: Ounce to Gram conversion table
Ounce	Gram
1oz	28g
2oz	57g
3oz	85g
4oz	113g
5oz	142g
6oz	170g
8oz	227g
10oz	283g

Based on rolled oats density of 0.34 g/ml (spooned method). Source: USDA FoodData Central.

Understanding Rolled Oats Conversions

The Math Behind This Conversion

To convert 1 ounces of rolled oats to grams, multiply by 28.3495 (the number of grams per ounce). So 1oz × 28.3495 = 28.3g.

Measurement Tip

For consistent results with rolled oats, use a scale whenever possible. Volume measurements of grains can vary significantly based on how tightly packed they are. The density of 0.34 g/ml we use is based on a standard pour into a measuring cup.

About Our Data

The density value of 0.34 g/ml for rolled oats is from the USDA FoodData Central database (ID: 173904). This measurement was taken with rolled oats spooned into the measuring cup and leveled. Different measurement methods affect the density: packed (0.42 g/ml).

View source data on USDA FoodData Central (ID: 173904)

Frequently Asked Questions

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