Ask why 100 grams of honey fills less than a third of a cup while 100 grams of flour fills nearly a whole cup, and the answer comes down to one word: density. Grams to cups conversions aren’t a single fixed number — they change with every ingredient, because every ingredient packs its mass into a cup differently.
The short answer
A cup is a unit of volume; it always holds the same amount of space no matter what you put in it. A gram is a unit of weight, and how much an ingredient weighs depends entirely on how dense that ingredient is. Fill the same cup with flour and honey and you get two very different weights, even though the volume never changed.
Density is the reason
Think of a cup as a fixed-size box. Flour is light and full of trapped air pockets between its fine particles, so packing a cup with flour doesn’t add up to much weight — about 120 grams. Honey has almost no air in it at all; it’s a thick, continuous liquid, so the same cup holds about 339 grams of it. Butter sits in between, at 227 grams a cup, because it’s a solid fat that’s denser than flour but lighter than a syrup like honey.
This is exactly why a universal “cups → grams” formula doesn’t exist. Any accurate conversion has to start from that specific ingredient’s grams-per-cup value, not a generic assumption.
Grams per cup for common ingredients
| Ingredient | 1 cup in grams | Why |
|---|---|---|
| Flour | 120g | Fine, airy particles trap space between them |
| Almond flour | 96g | Coarser and lighter than wheat flour |
| Powdered sugar | 120g | Fine but fluffier than granulated sugar |
| Brown sugar | 220g | Packed firm, with molasses adding weight |
| Butter | 227g | A dense solid fat |
| Honey | 339g | A thick liquid with almost no trapped air |
Ingredients with similar names can still land far apart — powdered sugar weighs almost half as much per cup as brown sugar, even though both are technically “sugar.” For every ingredient side by side across common gram amounts, see the conversion charts hub.
How to convert
Once you know an ingredient’s grams-per-cup value, converting in either direction is the same formula:
grams = cups × grams per cup
Reverse direction: cups = grams ÷ grams per cup
A recipe asking for “1 cup of brown sugar” means 1 × 220 = 220 grams. The same “1 cup” of honey means 1 × 339 = 339 grams — much heavier for the identical cup measurement.
Try it yourself
Enter a cup amount and any ingredient to see its exact weight in grams.
Examples
- 1 cup of flour weighs 120g, but 1 cup of almond flour weighs only 96g — almond flour’s coarser texture leaves more air between particles.
- 1 cup of granulated sugar weighs 198g, while 1 cup of brown sugar weighs 220g, because packed brown sugar holds together more tightly.
- 1 cup of butter (227g) and 1 cup of honey (339g) show the widest gap on this list — a solid fat versus a dense, air-free liquid.
Density can also shift within one ingredient — how firmly you pack brown sugar, or whether flour is sifted first, changes the real weight per cup. That's why weighing on a scale is more repeatable than scooping. Read our conversion methodology to see how each ingredient's value is measured and verified.
Frequently asked questions
Why does honey weigh so much more per cup than flour?
Honey is a thick liquid with essentially no trapped air, so its full volume is dense, continuous mass. Flour is a dry powder with air pockets between its particles, so a cup of flour is mostly space plus a lighter amount of actual flour. That difference in density is why honey (339g/cup) outweighs flour (120g/cup) by nearly 3×.
Does packing an ingredient change its density?
Yes. Pressing an ingredient into the cup — common with brown sugar and butter — removes air pockets and increases the weight per cup. Spooning an ingredient in loosely, like with flour or powdered sugar, keeps more air in and lowers the weight per cup. Each ingredient's page notes its standard measuring method.
Is it more accurate to bake by weight than by cups?
Generally yes. A gram is an exact, unchanging unit, while a "cup" of a dry or fatty ingredient can vary by how it was scooped or packed. Weighing removes that variability, which is why many professional and European recipes are written in grams. Use the grams to cups calculator if your recipe is in grams but your measuring tools are cups, or the reverse.
Can I still get good results using cups?
Yes — as long as you measure consistently (spoon flour in and level it, firmly pack brown sugar, and so on) and use the ingredient-specific grams-per-cup value rather than assuming every ingredient equals 240 grams per cup. See the full ingredient list for every conversion this site supports.