A 5 lb bag of whole wheat flour holds about 20.1 cups. The arithmetic is simple: 5 lb is 2,268 g, and one cup of whole wheat flour weighs 113 g spooned and levelled, so 2,268 divided by 113 is 20.1 cups. That is more cups than a bag of white flour, which holds 18.9 cups — because whole wheat flour is lighter per cup. The bran and germ in whole wheat flour make it less dense than white flour, so a cup weighs less and a bag holds more cups. Some sources quote 120 g per cup for whole wheat flour, which would give 18.9 cups, but the King Arthur figure of 113 g is the one this site uses, and it is the figure that matches the way whole wheat flour actually measures.
Twenty point one cups is about six loaves of whole wheat bread at 3 cups per loaf, or ten batches of whole wheat muffins at 2 cups per batch. Whole wheat flour is used differently from white flour: it makes denser, heartier baked goods, and it is often mixed with white flour rather than used alone — a common ratio is half whole wheat and half white, which gives the flavour and nutrition of whole wheat with the lighter texture of white. Knowing the bag holds 20.1 cups helps you plan a mix: if a recipe uses 1 1/2 cups of whole wheat and 1 1/2 cups of white, a 5 lb bag of each covers about thirteen loaves.
Bag of whole wheat flour conversion table
The table below shows how many cups you get from fractions of a 5 lb bag, and how many cups of whole wheat flour weigh how many grams. All figures use 113 g per cup, spooned and levelled.
| Amount | Cups (approx.) | Weight |
|---|---|---|
| 1/4 bag | 5.03 cups | 567 g |
| 1/2 bag | 10.05 cups | 1,134 g |
| 3/4 bag | 15.08 cups (about 15 1/8 cups) | 1,701 g |
| Full bag | 20.10 cups (about 20 1/8 cups) | 2,268 g |
| Cups | Grams (approx.) |
|---|---|
| 1 cup | 113 g |
| 2 cups | 226 g |
| 3 cups | 339 g |
| 4 cups | 452 g |
| 5 cups | 565 g |
| 10 cups | 1,130 g |
Whole wheat flour is lighter per cup than white flour (113 g vs 120 g), so a 5 lb bag holds more cups — 20.1 instead of 18.9. Some sources quote 120 g per cup; the King Arthur figure of 113 g is used here.
Worked examples
Whole wheat sandwich loaves for a month
A household that bakes a whole wheat sandwich loaf every weekend uses about 3 cups of flour per loaf. One 5 lb bag holds 20.1 cups, so it covers six loaves with 2 cups to spare — about six weeks of baking. Whole wheat bread is denser than white bread, so use a little more yeast and let the dough rise a little longer, and add a tablespoon of honey or molasses per loaf to balance the bitterness of the bran. Weigh the flour: 3 cups is 339 g, and weighing is more reliable than cup measurements, which vary with how you fill the cup.
A half-and-half loaf for better texture
A baker who finds 100% whole wheat bread too dense uses a half-and-half mix: 1 1/2 cups of whole wheat flour and 1 1/2 cups of white flour per loaf. One 5 lb bag of whole wheat flour holds 20.1 cups, so it covers thirteen loaves at this ratio, and a 5 lb bag of white flour covers the other half. The mixed loaf has the flavour and fibre of whole wheat with a lighter, more open crumb. Let the dough rest for twenty minutes after mixing before kneading — the bran needs time to absorb water, and a rest makes the dough easier to handle.
Whole wheat muffins for a week of breakfasts
A batch of twelve whole wheat muffins uses 2 cups of flour, so one 5 lb bag holds enough for ten batches — 120 muffins. Bake a double batch on Sunday, freeze half, and you have breakfast for two weeks. Whole wheat muffins are heartier than white muffins, so add a little extra liquid — a tablespoon of milk or yogurt per batch — to keep them moist. The bran in the flour absorbs water as the muffins bake, which is why whole wheat batters often look wetter than white batters at first and then firm up.
How the figure is worked out
There is no weighing involved in the headline answer — it is arithmetic on two published numbers. The package weight is a standard 5 lb (2,268 g) bag of whole wheat flour. The cup weight comes from the ingredient table, and dividing one by the other gives the cups in the package. That is also why the answer is approximate: scoop a cup differently and the grams per cup change, so the cups per bag move with it. For anything where the amount truly matters, weigh the ingredient instead of counting cups. The cup weight used here is 113 g per cup, spooned and levelled, sourced from King Arthur Baking. King Arthur lists 113 g per cup; some sources quote 120 g. The bran makes whole wheat flour lighter per cup than white flour.
Practical guidance
Whole wheat flour goes off faster than white flour, and that is the most important thing to know about it. The bran and germ contain oils, and those oils go rancid at room temperature — whole wheat flour keeps for about three months in a cool cupboard, compared with a year for white flour. Store it in an airtight container in the fridge or freezer, where it will keep for six months or more. If the flour smells bitter or oily, it has gone rancid and should be thrown away — rancid flour will ruin a loaf, and no amount of seasoning will hide it. Buy whole wheat flour in the 5 lb bag only if you bake with it regularly; if you bake with it rarely, buy the smaller bag.
Measure whole wheat flour by weight. A cup can weigh 113 g spooned and levelled or more scooped, and the bran makes the variation worse, because bran does not pack the way white flour does. Weighing removes the variable: 3 cups is 339 g, every time. When you substitute whole wheat flour for white flour in a recipe, do not swap it cup for cup by weight without adjusting the liquid — whole wheat flour absorbs more water, so add a tablespoon or two of extra liquid per cup of flour, and let the dough rest for twenty minutes so the bran can hydrate before you judge the consistency.
Frequently asked questions
Why does a bag of whole wheat flour hold more cups than white flour?
Because whole wheat flour is lighter per cup — 113 g instead of 120 g. The bran and germ make it less dense, so a cup weighs less and a 5 lb bag holds more cups: 20.1 instead of 18.9. Some sources quote 120 g per cup for whole wheat flour, which would give 18.9 cups, but the King Arthur figure of 113 g is the standard used here.
How long does whole wheat flour keep?
About three months in a cool cupboard, or six months or more in the fridge or freezer, in an airtight container. The oils in the bran and germ go rancid at room temperature, so whole wheat flour keeps for much less time than white flour. If it smells bitter or oily, throw it away.
Can I use whole wheat flour instead of white flour?
Yes, but expect a denser, heartier result. Whole wheat flour absorbs more water, so add a tablespoon or two of extra liquid per cup, and let the dough rest for twenty minutes so the bran can hydrate. For a lighter result, use half whole wheat and half white flour — the most common compromise.
How many loaves does a 5 lb bag of whole wheat flour make?
About six loaves at 3 cups per loaf, or thirteen loaves if you use a half-and-half mix with white flour. A batch of twelve muffins uses 2 cups, so a bag covers ten batches. The exact number depends on the recipe and on whether you use the flour alone or mixed.
Should I store whole wheat flour in the fridge?
Yes, if you will not use it within a few weeks. The fridge or freezer slows the oils in the bran from going rancid, and whole wheat flour keeps for six months or more when refrigerated in an airtight container. Bring it to room temperature before baking, because cold flour absorbs water more slowly.