Cups of Oats to Grams Converter
This page converts cups of rolled oats into grams, the way serious bakers weigh ingredients. One US cup of rolled oats is about 90 g, so the conversion is a multiplication by 90. Because rolled oats is measured by volume in many American recipes but by weight in most European and professional ones, a quick, reliable conversion saves failed bakes.
How to convert Cups of oats to grams
Multiply the number of cups by 90. For example 2 cups of rolled oats is 2 × 90 = 180 g. To go the other way, divide grams by 90: 180 g ÷ 90 = 2 cups.
Cups of oats to grams chart
| Cups (cup) | Grams (g) |
|---|---|
| 1/8 cup | 11.25 g |
| 1/4 cup | 22.5 g |
| 1/3 cup | 30 g |
| 3/8 cup | 33.75 g |
| 1/2 cup | 45 g |
| 2/3 cup | 60 g |
| 3/4 cup | 67.5 g |
| 1 cup | 90 g |
| 1 1/2 cup | 135 g |
| 2 cup | 180 g |
| 2 1/2 cup | 225 g |
| 3 cup | 270 g |
| 4 cup | 360 g |
| 5 cup | 450 g |
| 6 cup | 540 g |
| 8 cup | 720 g |
| 10 cup | 900 g |
Grams to Cups of oats (reverse)
| Grams (g) | Cups (cup) |
|---|---|
| 10 g | 0.1111111 cup |
| 25 g | 0.2777778 cup |
| 50 g | 0.5555556 cup |
| 75 g | 0.8333333 cup |
| 100 g | 1.111111 cup |
| 125 g | 1.388889 cup |
| 150 g | 1.666667 cup |
| 175 g | 1.944444 cup |
| 200 g | 2.222222 cup |
| 225 g | 2.5 cup |
| 250 g | 2.777778 cup |
| 300 g | 3.333333 cup |
| 350 g | 3.888889 cup |
| 400 g | 4.444444 cup |
| 500 g | 5.555556 cup |
| 600 g | 6.666667 cup |
| 750 g | 8.333333 cup |
| 1,000 g | 11.11111 cup |
How much does a cup really weigh?
Density is the reason there is no single answer: a cup is a measure of space, not weight, so its weight depends on the ingredient. Old-fashioned rolled oats weigh about 80 to 90 g per cup; quick oats are slightly denser. The figure of 90 g per cup used here is a common baking reference value; your own flour, humidity and scooping habit can move it a few percent either way.
Measure by spooning the ingredient lightly into the cup and leveling the top with a knife; never press it down unless the recipe says "packed". Scooping straight from the bag compacts dry ingredients and can add 20% or more. A digital kitchen scale removes the guesswork entirely, and it also means fewer dishes to wash.
Cups of oats to grams FAQ
How many grams are in one cup of rolled oats?
One US cup of rolled oats weighs about 90 g. That is a typical reference value, not an exact constant, because the weight changes with how the ingredient is packed.
What is the quickest way to convert cups of rolled oats and grams in my head?
Round the factor to about 90 g per cup: 2 cups is then about 180 g against an exact 180 g.
Why do recipes disagree about the weight of a cup of rolled oats?
Brands, sifting and scooping style change how much fits in the cup. Old-fashioned rolled oats weigh about 80 to 90 g per cup; quick oats are slightly denser.
Should I weigh rolled oats instead of using cups?
Yes, if you can. Weight is repeatable, so a recipe that calls for 180 g of rolled oats will give the same result every time, while two cups can differ by 10 to 20% from one person to the next.