100 grams of oat flour is about 17.4 tablespoons. A tablespoon is one sixteenth of a cup, and a cup of oat flour is 92 g spooned and levelled, so the maths is 1600 ÷ 92 = 17.4 tbsp — or, the other way round, one tablespoon weighs 5.8 g. If you cook from recipes written in grams and spoons, this page is the bridge between the two, and the worked examples show the conversion inside real dishes rather than in isolation.

Oat flour is the gluten-free flour for pancakes, muffins and tender bakes with a mild, oaty flavour. A hundred grams is about 17.4 tablespoons, which is far more spoons than wheat flour needs, because oat flour is light per cup — only 92 g. That lightness is the practical point: a recipe written in cups will call for more oat flour by volume than by weight, and a cook who swaps flours by the spoon will end up short. Weigh oat flour whenever you can, and use the tablespoon table as a guide rather than a rule.

All figures on this page are approximate, and they come from King Arthur Baking, measured spooned and levelled. When a recipe has to work the first time, verify with a kitchen scale.

Conversion table

One tablespoon is one sixteenth of a cup, so every tablespoon figure here is the gram amount divided by the weight of one tablespoon. All figures are approximate; verify with a kitchen scale when it matters.

Grams Tablespoons (approx.)
10 g 1.7 tbsp
20 g 3.5 tbsp
25 g 4.3 tbsp
30 g 5.2 tbsp
40 g 7.0 tbsp
50 g 8.7 tbsp
60 g 10.4 tbsp
75 g 13.0 tbsp
80 g 13.9 tbsp
100 g 17.4 tbsp
120 g 20.9 tbsp
125 g 21.7 tbsp
150 g 26.1 tbsp
200 g 34.8 tbsp
250 g 43.5 tbsp
300 g 52.2 tbsp
500 g 87.0 tbsp

The reverse table is just as useful: when a recipe gives tablespoons and you want to know the weight before you reach for the scale.

Tablespoons Grams (approx.)
1 tbsp 5.8 g
2 tbsp 11.5 g
3 tbsp 17.2 g
4 tbsp 23.0 g
5 tbsp 28.8 g
6 tbsp 34.5 g
7 tbsp 40.2 g
8 tbsp 46.0 g
9 tbsp 51.8 g
10 tbsp 57.5 g
11 tbsp 63.2 g
12 tbsp 69.0 g
13 tbsp 74.8 g
14 tbsp 80.5 g
15 tbsp 86.2 g
16 tbsp 92.0 g

One tablespoon of oat flour weighs 5.8 g, and one cup weighs 92 g. Those two figures are all you need to move between grams, tablespoons and cups for this ingredient.

Cups to grams for reference

When a recipe jumps from spoons to cups, use this table instead of counting out tablespoons. Every figure is the cup weight multiplied by the fraction, rounded to one decimal place, and all figures are approximate.

Cups Grams (approx.)
1/4 cup 23.0 g
1/3 cup 30.7 g
1/2 cup 46.0 g
2/3 cup 61.3 g
3/4 cup 69.0 g
1 cup 92.0 g

How the measurement works

The figure on this page comes from King Arthur Baking, measured spooned and levelled. Finely ground whole oats; naturally gluten-free but often milled in wheat facilities. Pancakes, muffins and gluten-free baking.

All results on this page are approximate. Ingredient weights vary with brand, humidity, temperature and how firmly you pack the spoon, so when a recipe has to work the first time, weigh the ingredient on a kitchen scale and use the numbers here as a guide. The method matters more than the number itself, because the same spoon of oat flour measured two different ways can give two different weights, and the King Arthur Baking value assumes the spooned and levelled method every time.

Worked examples

Oat flour pancakes for two

A pancake batter for two takes 100 g of oat flour, which is about 17.4 tablespoons spooned and levelled, and the batter needs to rest for ten minutes before cooking, so the oat flour hydrates. The amount matters because oat flour absorbs liquid slowly — a batter that looks too thin at first will thicken as it rests, and adding more flour too soon makes dry pancakes.

A single-serve oat muffin

A muffin for one takes 8 tablespoons (46.0 g) of oat flour mixed with an egg, milk and a little baking powder, and the spoon measure is what keeps the muffin tender instead of dense. Do not overmix the batter — oat flour has no gluten, so overmixing does not toughen it, but it does knock out the air and the muffin will not rise.

Oat flour in a cookie dough

A cookie dough takes 4 tablespoons (23.0 g) of oat flour swapped in for part of the white flour, and the oat flour gives the cookies a soft, chewy bite. Swap only part of the flour — a cookie made with all oat flour spreads flat and crumbles, because there is no gluten to hold it together.

Practical guidance

Spoon oat flour lightly into the measure and level it, and never press it down: oat flour is fine and airy, and packing it can add a third to the weight. Oat flour is naturally gluten-free, but it is often milled in wheat facilities, so if you are baking for someone with coeliac disease, buy certified gluten-free oat flour and check the label. Oat flour absorbs liquid slowly, so let a batter rest for ten minutes after mixing — a batter that looks too thin at first is usually right once the flour has hydrated.

You can make oat flour at home by blending rolled oats, but the result is coarser and heavier per spoon than bought oat flour, so the figures on this page will not hold for homemade flour — weigh it instead. Store oat flour in an airtight container in a cool, dry place for up to six months; it goes stale faster than wheat flour, because oats contain more fat.

Scaling with spoons is easy once you know the weight of one spoon. To measure 100 g of oat flour, count out about 17.4 tablespoons, and for 50 g, about 8.7 tablespoons. Halving a recipe that calls for 4 tablespoons means using 2 tablespoons, or 11.5 g, and doubling it means 8 tablespoons, or 46.0 g. The key is to scale every ingredient by the same factor, because changing one ingredient without changing the others throws the recipe out of balance. For large amounts, switch to a cup measure or a scale, since counting out tablespoons one by one is slow and error-prone, and a cup is faster and more accurate.

When should you weigh oat flour instead of measuring it? Whenever the recipe has to work the first time, and whenever the amount is large. A kitchen scale costs less than a single failed bake, and it removes the biggest source of variation in home cooking, which is the way ingredients pack into a cup or a spoon. Put the bowl on the scale, press tare, and add the oat flour until the display shows the number you need. There is nothing to wash afterwards except the bowl, and the result is the same every time. For small amounts, a level spoon is accurate enough, and for anything where precision matters, the scale is the tool to reach for.

Storage. Airtight container, cool and dry, up to 6 months.

  • Level every spoon with the back of a knife.
  • Use spoons for small amounts, and a scale for large ones.
  • Keep the same spoon for the whole recipe so errors stay consistent.

Frequently asked questions

How many tablespoons is 100 g of oat flour?

100 g of oat flour is about 17.4 tablespoons, measured spooned and levelled. Because a level tablespoon is not always exactly the same, treat that as an approximation and verify with a kitchen scale when the recipe has to work the first time.

How many grams is 1 tablespoon of oat flour?

One level tablespoon of oat flour weighs approximately 5.8 g. That figure comes from dividing the cup weight of 92 g by 16, and it assumes the ingredient is measured spooned and levelled. All figures on this page are approximate, so verify with a kitchen scale when it matters.

Why does 100 g of oat flour need so many tablespoons?

Because oat flour is light. A cup weighs only 92 g, against 120 g for wheat flour, so 100 g needs about 17.4 tablespoons. That is also why swapping flours by the spoon is risky: a cup of oat flour is much lighter than a cup of wheat flour, so always swap by weight.

Is oat flour gluten-free?

Oats are naturally gluten-free, but oat flour is often milled in wheat facilities, so it can be contaminated. If you are baking for someone with coeliac disease, buy certified gluten-free oat flour and check the label.

Can I make oat flour at home?

Yes, by blending rolled oats until fine — but homemade oat flour is coarser and heavier per spoon than bought oat flour, so the figures on this page will not hold for it. Weigh homemade oat flour instead of using the tablespoon table.

How should I store oat flour?

Airtight container, cool and dry, up to 6 months. Keeping it stored properly also keeps its weight consistent, since an ingredient that has absorbed moisture or dried out will not weigh the same per spoon as a fresh one.

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