1 Cup Steel-Cut Oats in Grams

1 cup of steel-cut oats weighs 140 g (spooned and levelled, King Arthur Baking). Whole oat groats cut into pieces; chewy and hearty. All the figures on this page are approximate conversions based on the King Arthur Baking value, so when a recipe really matters, verify with a kitchen scale.

Why weighing steel-cut oats beats measuring it in cups

Steel-cut oats weigh 140 g per cup, far more than rolled oats at 89 g, and the difference is entirely about shape. Rolled oats are flattened flakes full of air, while steel-cut oats are dense little pieces of whole oat groat, cut with steel blades and never flattened, so they pack tightly into a cup with very little air space. A recipe that swaps one for the other cup for cup will be badly wrong: a cup of steel-cut oats contains half as much again by weight as a cup of rolled oats, and it also absorbs far more water and takes far longer to cook.

Cooking time is the second reason the weight matters. Steel-cut oats take 25 to 30 minutes to cook, compared with 5 minutes for rolled oats, because the dense pieces need time for water to penetrate. The ratio is about one part oats to four parts water by volume, or 140 g of oats to about 560 ml of water, and that ratio only works when the oats are weighed. A cup measured loosely can be 15 g light, which changes the porridge from thick to thin. Steel-cut oats are also the chewiest oat, with a nutty flavour and a texture that holds up in the bowl, which is why they are the choice for a hearty breakfast rather than a quick one.

Steel-Cut Oats cups to grams conversion table

Cups Grams Tablespoons
1/4 cup 35 g 4
1/3 cup 46.7 g 5.3
1/2 cup 70 g 8
2/3 cup 93.3 g 10.7
3/4 cup 105 g 12
1 cup 140 g 16
1 1/2 cups 210 g 24
2 cups 280 g 32
3 cups 420 g 48
4 cups 560 g 64

One tablespoon of steel-cut oats weighs about 8.8 g, since a cup is 16 tablespoons. That is useful when a recipe calls for a spoonful or two rather than a whole cup, though for small amounts a scale that reads to the gram is far more reliable than a spoon, because a heaped tablespoon can weigh half as much again as a level one.

Worked examples

Steel-cut oat porridge for four

Porridge for four people uses about 1 cup of steel-cut oats, which is 140 g, simmered in 560 ml of water with a pinch of salt for 25 to 30 minutes. Weigh 140 g rather than measuring by cups, because the dense pieces settle differently and a cup can be 15 g light or heavy. Stir occasionally, add milk at the end if you like, and serve with honey and fruit.

Overnight steel-cut oats for two

Overnight oats for two people use about 1/2 cup of steel-cut oats, which is 70 g, soaked in 240 ml of milk or water overnight in the fridge. Steel-cut oats need a long soak, and even then they will be chewier than rolled oats, so this method suits people who like a hearty texture. Weigh 70 g and use a ratio of about one part oats to three parts liquid for the soak.

Steel-cut oat breakfast bowls for a week

A batch of porridge for a week uses about 2 cups of steel-cut oats, which is 280 g, cooked in 1.1 litres of water and portioned into containers. Weighing 280 g keeps the batch consistent, and the porridge reheats well with a splash of milk. Steel-cut oats hold their texture better than rolled oats when stored, so the Friday bowl is almost as good as the Monday one.

How the weight was measured

The figure on this page comes from King Arthur Baking, measured spooned and levelled unless the method line says otherwise. Spooning means filling the cup with a spoon rather than plunging the cup into the bag, and levelling means sweeping a knife across the rim. Scooping packs the ingredient down and can add a fifth or more to the weight, which is why two bakers following the same cup-based recipe can get visibly different results.

Confidence in this value is high. That reflects how consistent the ingredient is from brand to brand: a uniform, factory-packed ingredient is more predictable than a fresh, variable one. Even a high-confidence figure is still an approximation, because moisture, grind size and settling all shift the weight a little. Treat the grams on this page as a reliable starting point and check with a scale when the recipe is fussy, expensive, or being made for the first time.

Practical guidance

Store steel-cut oats in an airtight container in a cool, dry place for up to 6 months, and refrigerate them in warm weather, because their oils go rancid. Do not confuse steel-cut oats with rolled oats or instant oats: they look different, weigh differently per cup, and cook differently, so check the packet before you start. Toast the oats in a dry pan for a few minutes before cooking for a nuttier flavour, and add a pinch of salt to the water, which brings out the flavour. If you do not have a scale, spoon the oats into the cup and level it, remembering that the 140 g figure is approximate. For porridge, the water ratio matters more than the exact oat weight, so measure the water carefully as well.

Common mistakes with grains and crumbs

The most common mistake is measuring grains and crumbs by scooping the cup through the bag. Scooping compresses the contents and a cup can easily hold a fifth more than a spooned cup, which changes the liquid balance of a porridge, a stuffing or a coating. Spoon and level, or weigh. The second mistake is confusing cooked and uncooked weights: a cup of dry barley and a cup of cooked barley are entirely different ingredients, and recipes that mix them up fail badly. This page covers the dry ingredient only. The third is storing crumbs and grains in the open bag: they go stale and pick up kitchen smells within weeks, so decant into an airtight jar. Finally, do not substitute panko for fine breadcrumbs cup for cup: panko is far lighter, so the same volume weighs less than half as much and the coating comes out thin and patchy.

Frequently asked questions

How many grams is 1 cup of steel-cut oats?

1 cup of steel-cut oats weighs 140 g when spooned and levelled, according to King Arthur Baking. The figure is approximate, because the cut pieces settle differently, so verify with a kitchen scale when it matters.

Why do steel-cut oats weigh more than rolled oats?

Because steel-cut oats are dense pieces of whole oat groat that pack tightly, while rolled oats are flattened flakes full of air. A cup of steel-cut oats is 140 g and a cup of rolled oats is 89 g, so the two are not interchangeable by volume.

Can I use steel-cut oats instead of rolled oats?

Only with adjustments. Steel-cut oats weigh more per cup, absorb more water, and take 25 to 30 minutes to cook compared with 5 minutes for rolled oats. Weigh them, increase the liquid, and allow much more cooking time.

How much water do I need for 1 cup of steel-cut oats?

About 560 ml of water, or a ratio of one part oats to four parts water by volume. Weigh 140 g of oats and measure the water, then simmer for 25 to 30 minutes until tender, stirring occasionally.

How many cups is 100 g of steel-cut oats?

100 g of steel-cut oats is about 0.71 cups, or just under 3/4 cup. At 140 g per cup, divide 100 by 140 to get the answer, and use a scale for the most accurate result.

Related conversions

If you need a different amount, the table above scales in both directions, and the converter tool will do the maths for any quantity. When a recipe really matters, weigh the ingredient on a kitchen scale rather than trusting the cup alone, because the figures on this page are approximate and natural ingredients vary by brand, variety and moisture.