Date sugar

One US cup of date sugar weighs between 144 and 240 grams (5.1 to 8.5 ounces), depending on how the cup is filled and which source measured it. That range is the answer; a single number would not be. Every figure behind it is below, with the method each source used.

Sugars compared: cup weights side by side, the source behind each, and why they differ.

TL;DR: Date sugar shows extreme commercial variance from 144 to 240 grams per cup across producer labels, driven by the lack of any standard definition, differences in grind fineness, and Wikipedia-documented compositional variation (some products contain added maltodextrin). Publishing a wide range because five brand labels genuinely disagree by nearly 70 percent. This is closer to a category of related products than a single ingredient.

Date sugar is not a sugar in the traditional refined-sucrose sense — it is dehydrated dates ground into a granulated or powdered form, with the fiber, minerals, and dark caramel-like flavor of whole dates intact. Wikipedia notes that many commercial date 'sugars' are actually date powder made by drying a date paste mixed with maltodextrin (a common food additive), then grinding the result. Others are simply pulverized dried dates. There is no legal definition, no USDA composition entry, no King Arthur chart listing, and no dominant retail brand — Date Lady, NOW Real Food, Let's Date, Kartago, Just Date, Amrita, and Shields Date Garden are all distinct products with distinct textures and densities.

The producer label data spans roughly 144 to 240 grams per cup, a 67 percent spread. Three convergent brands (NOW Real Food, Amrita's Powdered Dried Dates, Date Lady) all list 2 teaspoons at 6 grams, extrapolating to 144 g per cup — this represents the finely-ground, whole-date-powder convention. Let's Date Organic Date Sugar lists 2 teaspoons at 8 grams (192 g/cup), a more granular product. Kartago's Date Sugar lists 1 tablespoon at 15 grams (240 g/cup), at the extreme dense end, possibly reflecting a packed serving convention or an unusually fine grind that eliminates air gaps.

The physical explanation for the wide spread is straightforward. A finely-milled whole-date powder behaves more like cocoa powder than like a crystalline sugar — the particles are irregular, low-density, and fibrous, so a spooned cup holds a lot of air and less material by mass. A coarser granulated date product packs more efficiently because the particles nestle together with fewer gaps. Products containing maltodextrin (a fine white powder that flows freely) shift the density in either direction depending on the mixing ratio. And unlike refined sugars, date sugar is hygroscopic — it absorbs atmospheric moisture — so the density of the same bag can change measurably between a dry pantry and a humid kitchen.

King Arthur Baking does not list date sugar on their ingredient weight chart, and USDA FoodData Central has no distinct date-sugar composition entry. The closest USDA reference is for chopped dried dates, which sits around 150 g/cup — roughly aligning with the finely-ground end of the date-sugar range and consistent with the intuition that ground dates should not weigh much more per cup than the chopped whole fruit unless there is compaction or added ingredients.

Practical baker recommendation: this is one of the strongest cases for weighing ingredients rather than measuring by cup. Two brands of 'date sugar' can differ by 40 to 60 grams per cup, enough to fundamentally change the sugar-to-flour ratio of a recipe. If you must measure by volume, check the specific bag's Nutrition Facts panel — the teaspoon or tablespoon serving size is usually listed, and multiplying by 48 (teaspoons per cup) or 16 (tablespoons per cup) gives an approximate cup weight for that specific product. When substituting date sugar for granulated sugar in a recipe, most producers recommend a 1:1 volume swap plus a 25 percent reduction in flour to account for date sugar's moisture-absorbing fiber, though the exact adjustment depends on which product you are using.