420g Oats in Cups
420 grams of rolled oats is 4⅔ cups — 90g per US cup. Granola and batch flapjacks use weights like this, where oats are usually the base and everything else is scaled against them.
How many cups is 420g of rolled oats?
420 grams of rolled oats equals:
Measuring by hand? That is 4 cups + 10 tablespoons + 2 teaspoons. It is about 84% of a 500 g bag of oats.
Rolled oats are flaky and full of air, so they take up far more cup volume than the same weight of flour or sugar. Do not press them down.
Grams to Cups Converter
Quick select
420 grams of Oats is about 4⅔ cups, using a 236.588 millilitre cup at 90 grams per cup.
Reading
- cups
- 4.67
- tbsp
- 74.7
- tsp
- 224.0
See the full 420g to cups guide →
US customary cup (236.588ml) · 90g per cup
Dedicated conversion guides use the default US customary cup.
Applies to this page only — the database value (90g per US cup) is unchanged.
420g of rolled oats vs other ingredients
Grams measure weight and cups measure volume, so the same 420 grams fills a different amount of cup for every ingredient:
| Ingredient | 420g in cups | g per cup |
|---|---|---|
| Oats | 4⅔ cups | 90 |
| All-Purpose Flour | 3⅜ cups | 125 |
| Granulated Sugar | 2⅛ cups | 200 |
| Butter | 1⅞ cups | 227 |
See all 420g conversions on the 420 grams to cups chart.
Nearby rolled oats amounts
| Grams of rolled oats | Cups | Tablespoons |
|---|---|---|
| 375g | 4⅛ cups | 67 tbsp |
| 390g | 4⅓ cups | 69 tbsp |
| 400g | 4½ cups | 71 tbsp |
| 410g | 4½ cups | 73 tbsp |
| 450g | 5 cups | 80 tbsp |
| 454g | 5 cups | 81 tbsp |
| 480g | 5⅓ cups | 85 tbsp |
| 500g | 5½ cups | 89 tbsp |
Full ladder on the oats grams to cups chart.
Frequently Asked Questions
How many cups is 420g of rolled oats?
420 grams of rolled oats is 4⅔ cups. In kitchen measures that is 4 cups + 10 tablespoons + 2 teaspoons, worked out from 90 grams per US cup.
How many grams are in 1 cup of rolled oats?
One US cup of rolled oats weighs about 90 grams, one tablespoon about 5.63 grams, and one teaspoon about 1.88 grams. This page divides 420 grams by that cup weight.
Is 420g of rolled oats the same as 420g of all-purpose flour?
No. 420g of rolled oats is 4⅔ cups, while 420g of all-purpose flour is 3⅜ cups. Same weight on the scale, different volume in the cup, because the two have different densities.
How do I measure 420g of rolled oats without a scale?
Use 4 cups + 10 tablespoons + 2 teaspoons. Rolled oats are flaky and full of air, so they take up far more cup volume than the same weight of flour or sugar. Do not press them down.
Is it better to weigh rolled oats or measure it in cups?
Weighing is more accurate, especially in baking, because it removes the variation in how the rolled oats is packed into the cup. If you have no scale, use the cup figure above and keep your measuring method consistent across the whole recipe.