A cup of steel-cut oats is 140 g — the King Arthur Baking figure, measured spooned and levelled. Whole oat groats cut into pieces; chewy and hearty. It is used for porridge and hearty breakfast bowls. They are the least processed oat you can buy, whole groats cut into pieces, and at 140 g per cup they are far heavier than rolled oats at 89 g. That gap is the first thing to know, because the two oats are not interchangeable by volume, and a recipe that swaps them cup-for-cup ends up with the wrong amount and the wrong texture. This guide covers the weight of steel-cut oats in every measure you will use — cups, tablespoons and teaspoons — how to measure it correctly, what to use instead when you run out, and how to store it. All weights on this page are approximate; verify with a kitchen scale when the recipe matters.
Steel-Cut Oats: weight and measurement table
The table below gives the weight of Steel-Cut Oats in every measure you will use, from a teaspoon up to 2 cups, all derived from the King Arthur Baking figure of 140 g per cup, spooned and levelled. Every figure is approximate — spooned and levelled is a technique, not a machine setting — so when the recipe matters, weigh the ingredient on a kitchen scale instead.
| Amount | Weight (approx.) |
|---|---|
| 1 teaspoon | 2.9 g |
| 1 tablespoon | 8.8 g |
| 1/4 cup (4 tbsp) | 35 g |
| 1/3 cup | 46.7 g |
| 1/2 cup (8 tbsp) | 70 g |
| 3/4 cup (12 tbsp) | 105 g |
| 1 cup (16 tbsp) | 140 g |
| 2 cups | 280 g |
| 100 g | 0.71 cups |
There are 3 teaspoons in a tablespoon and 16 tablespoons in a cup, so you can move between any of these measures by multiplying or dividing. If a recipe calls for 100 g and you only have measuring cups, that is about 0.71 cups. Keep the cups to grams converter open while you cook and you will never need to do the arithmetic in your head.
What is Steel-Cut Oats?
Whole oat groats cut into pieces; chewy and hearty. Steel-Cut Oats is used for porridge and hearty breakfast bowls. The ingredient is a familiar one in most kitchens, but it is worth knowing what it actually is before you measure it, because the form it comes in decides how it behaves in a recipe. Steel-Cut Oats as sold is the form the weight on this page refers to: 140 g per cup, spooned and levelled, from King Arthur Baking. If you buy it in a different form — chopped, ground, toasted, sweetened or unsweetened — the weight per cup changes, sometimes by a lot, so weigh the ingredient in the form the recipe asks for, or weigh it before you change its form. That single habit, weighing before chopping, grinding or toasting, is what keeps the recipe consistent from one bake to the next.
How to measure Steel-Cut Oats
Spoon the steel-cut oats lightly into the measuring cup or spoon, then level the top with the back of a knife. Do not scoop the measure straight from the bag or the jar, because scooping packs the ingredient down and adds weight with every spoonful. Do not press it down or shake the measure to settle it, because that packs it too. The spooned and levelled method is a technique, not a machine setting, so two people measuring the same ingredient can still differ by a few grams, which is why the figures on this page are approximate. When the recipe matters, weigh the steel-cut oats on a kitchen scale instead: put the bowl on the scale, press tare, and add the steel-cut oats until the scale reads the weight you need.
How to store Steel-Cut Oats
Airtight container, cool and dry, up to 6 months. That storage advice is worth following, because steel-cut oats goes stale faster than most cooks expect, and stale steel-cut oats will spoil a whole batch of baking. Keep it sealed, because air and moisture are what make it go stale, and keep it away from strong smells, because it absorbs odours from the cupboard. Check the ingredient before you use it: smell it, taste a little, and look at it. If it smells sharp, stale or off, or if it has changed colour or texture, replace it rather than risking a recipe on it. A small amount of fresh steel-cut oats is always better than a large amount of stale steel-cut oats, and the cost of replacing it is far less than the cost of a ruined bake.
What to use instead of Steel-Cut Oats
If you run out of steel-cut oats, the closest swaps are Rolled Oats at 89 g per cup, Quinoa at 177 g per cup. Swap by weight, not by volume, because the cup weights differ, and a volume swap gives the wrong amount. Each substitute changes the flavour a little, so choose the one that suits the dish: a mild substitute for a delicate bake, and a stronger one where the flavour can carry it. Taste the finished dish before serving, because a substitute that works in a salad may not work in a cake, and the other way round.
Worked examples: Steel-Cut Oats in real recipes
1. A pot of steel-cut oat porridge
A pot of steel-cut oat porridge for four uses 12 tablespoons of steel-cut oats, about 105 g, simmered in water and milk for about thirty minutes until thick and creamy. The oats give the porridge a chewy, hearty texture that rolled oats cannot match, and the ratio is everything: too many oats and the porridge turns into a solid lump, too few and it stays thin and watery. Soak the oats overnight to cut the cooking time, and stir the porridge regularly so it does not catch on the bottom of the pan.
2. Overnight steel-cut oats for a busy morning
Overnight steel-cut oats for two uses 8 tablespoons of oats, about 70 g, soaked in milk and yogurt in the fridge overnight. The oats soften slowly in the cold liquid and are ready to eat in the morning, with a chewy texture that is quite different from cooked porridge. The ratio matters here too: too many oats and the mixture turns solid, too few and it stays milky. Stir the oats once before bed, so they absorb the liquid evenly, and add fresh fruit in the morning.
3. A hearty breakfast bowl with steel-cut oats
A hearty breakfast bowl uses 10 tablespoons of steel-cut oats, about 87.5 g, cooked with water and topped with nuts, seeds and honey. The oats give the bowl its substance and its slow-release energy, and the weight is what decides whether the bowl is filling or stodgy: too many oats and the bowl turns heavy, too few and it feels like a snack. Cook the oats until they are tender but still chewy, and top them just before serving so the nuts stay crisp.
Why the weight of Steel-Cut Oats matters
Steel-cut oats matter by weight because they are dense and slow to cook, and the amount decides both the texture and the cooking time. In a porridge, the oat-to-water ratio is what makes the difference between a thick, hearty bowl and a thin, watery one, and a 20 g error is enough to tip it. Steel-cut oats take much longer to cook than rolled oats, about thirty minutes against five, so a recipe written for one cannot use the other without changing the cooking time as well. The cup measure is unreliable because the cut pieces are irregular and leave air gaps, so a scooped cup can be 10 g heavier than a spooned and levelled one. Weighing the oats keeps the ratio right, and it also matters because steel-cut oats absorb more water than rolled oats, so the liquid needs adjusting too.
The King Arthur Baking figure, and how it was measured
The King Arthur Baking figure for steel-cut oats is not disputed: 140 g per cup, spooned and levelled, is the accepted value, and other sources agree within a few grams. Small differences between brands and batches are normal, because natural ingredients vary, but the variation is small enough that the figure on this page is a reliable guide for everyday cooking. The figure on this page, 140 g per cup, was measured spooned and levelled, which is the standard method for this kind of ingredient. If you measure it differently — scooping instead of spooning, packing instead of levelling, or measuring after chopping — the weight changes, and the recipe changes with it. The source matters too: King Arthur Baking is the reference used throughout this site, because its figures are consistent and widely used in baking, and the USDA figures are used where King Arthur does not publish one. When two sources disagree, this site says so, and the figure given is the one judged most reliable for everyday cooking.
Common mistakes with Steel-Cut Oats
The most common mistake is swapping steel-cut oats for rolled oats cup-for-cup in a recipe: steel-cut oats are far denser, so the same cup holds 50 g more oats, and they take six times as long to cook. The second mistake is cooking steel-cut oats without soaking them first, which makes the porridge take even longer and can leave the oats tough; soak them overnight to cut the cooking time. The third mistake is using too little water, because steel-cut oats absorb a lot of liquid as they cook, and a porridge that looks right at the start can turn thick and dry by the end. Finally, do not store steel-cut oats in a damp place, because they go stale and taste woody within weeks; a sealed jar in a cool cupboard keeps them fresh for months.
Frequently asked questions
How many grams is 1 cup of steel-cut oats?
One cup of steel-cut oats weighs about 140 g, spooned and levelled, using the King Arthur Baking figure. That is for dry, uncooked oats as sold, and the weight is far higher than rolled oats at 89 g per cup, because the cut pieces are dense and pack tightly. The figure is approximate, so verify with a kitchen scale when the recipe matters.
How many tablespoons is 100 grams of steel-cut oats?
100 grams of steel-cut oats is about 11.4 tablespoons, spooned and levelled, because one tablespoon weighs about 8.8 g. Eleven level tablespoons is just under 100 g, so add a small pinch more, or weigh the oats on a scale for accuracy.
Can I substitute rolled oats for steel-cut oats?
Only with changes: rolled oats are lighter at 89 g per cup, so the same cup holds 50 g less, and they cook in five minutes against thirty for steel-cut oats. If you swap them, use more rolled oats by weight and cut the cooking time drastically, or the porridge will turn to mush. The texture is also different, because rolled oats give a softer, creamier porridge.
Do I need to soak steel-cut oats?
It helps a lot. Soaking steel-cut oats overnight in water cuts the cooking time from about thirty minutes to fifteen, and it makes the oats easier to digest. Drain the soaking water before cooking, and use fresh water or milk. If you skip the soak, the oats will still cook, but they take longer and can stay tough in the middle.
How should I store steel-cut oats?
Keep them in an airtight container in a cool, dry place for up to 6 months. Damp makes them go stale and taste woody, and warmth shortens their shelf life. Cooked steel-cut oats keep in the fridge for up to five days, and they reheat well with a splash of milk or water.