Grams to Cups CalculatorIngredient-Specific Baking Conversions
Convert grams to cups, and cups to grams, for 25 common ingredients using their real densities. Results are given in kitchen fractions and cups + tbsp + tsp, with a visual measuring cup.
Built & tested by Manzoor Ahmad, Pharmacist & Calculator Developer · Updated
Ingredient densities from USDA FoodData Central portion weights. US cup defined by NIST as 236.6 mL.
How many grams are in a cup?
It depends on the ingredient, because a cup measures volume, not weight. One US cup of all-purpose flour ≈ 125 g, granulated sugar ≈ 200 g, packed brown sugar ≈ 220 g, butter ≈ 227 g, water ≈ 237 g and rolled oats ≈ 80 g. To convert grams to cups, divide grams by the ingredient’s grams-per-cup, so 200 g of flour ÷ 125 ≈ 1⅝ cups.
Convert
= 1 cup + 9 tbsp + 2 tsp · exactly 1.60 cups
Same weight, different cups
Why grams matter: 200 g of different ingredients fills very different amounts of a cup.
Grams to cups chart for common baking ingredients
US customary cup (236.6 mL), spoon-and-level method. Rounded to the nearest ⅛ cup.
| Ingredient | 1 cup = | 100 g | 250 g | 500 g |
|---|---|---|---|---|
| All-purpose flour | 125 g | ¾ cup | 2 cup | 4 cups |
| Granulated sugar | 200 g | ½ cup | 1¼ cup | 2½ cups |
| Brown sugar (packed) | 220 g | ½ cup | 1⅛ cup | 2¼ cups |
| Butter | 227 g | ½ cup | 1⅛ cup | 2¼ cups |
| Powdered sugar | 120 g | ⅞ cup | 2⅛ cup | 4⅛ cups |
| Rolled oats | 80 g | 1¼ cup | 3⅛ cup | 6¼ cups |
| Uncooked rice | 185 g | ½ cup | 1⅓ cup | 2⅔ cups |
| Milk | 244 g | ⅜ cup | 1 cup | 2 cups |
Why there’s no single grams-to-cups number
A cup measures volume and a gram measures mass, so the conversion depends on each ingredient’s density. A cup of flour weighs about 125 g, while a cup of honey weighs 340 g. Our densities come from USDA portion data and standard US baking references.
A UK recipe asks for 200 g plain flour
- 200 ÷ 125 = 1.6 cups
- That’s about 1⅝ cups, or 1 cup + 9 tbsp + 2 tsp.
- Scoop flour straight from the bag and it can weigh 150 g per cup, which adds 20% extra flour and gives drier bakes. Spoon it in and level it off instead.
Measuring matters in medicine too
The same volume-versus-weight problem applies to liquid medicines. Kitchen teaspoons vary from 2.5 to 7.3 mL, so never use them to dose medicine, especially for children. Use the oral syringe or dosing cup that comes with the product. In baking, a 20% error means a dense cake. With paracetamol (acetaminophen) for a child, it can mean an overdose.
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Grams to Cups calculator FAQs
It depends on the ingredient. 100 g of all-purpose flour is about ¾ cup (0.8), 100 g of granulated sugar is ½ cup, 100 g of butter is a little under ½ cup (7 tbsp), and 100 g of rolled oats is about 1¼ cups.
One US cup of all-purpose flour weighs about 125 g when spooned and levelled, or up to 150 g if scooped straight from the bag. Bread flour is about 130 g per cup and whole wheat about 120 g.
One cup of granulated sugar weighs about 200 g, packed brown sugar about 220 g, and powdered (icing) sugar about 120 g.
About 1 cup + 1½ tbsp. One US cup (2 sticks) of butter weighs 227 g, and one stick is 113 g (½ cup).
Almost. A US customary cup is 236.6 mL, while the metric cup used in Australia, Canada and New Zealand is 250 mL, about 6% more. The UK no longer officially uses cups.
Weighing is more accurate and repeatable than cups, especially for flour, which can vary by 20–30% depending on how you fill the cup. Professional bakers measure in grams.
Manzoor Ahmad
Pharmacist · Supplement & Nutrition Writer (9+ yrs) · Calculator Developer (13+ yrs)
I’m a pharmacist, and precise measurement is part of my job. I built this converter on real ingredient densities rather than one ‘cups to grams’ number that only works for water. The note on kitchen spoons and medicine comes straight from the pharmacy counter.
References
- USDA. FoodData Central (household portion weights).
- NIST. Approximate Conversions from U.S. Customary Measures to Metric.
- Yin HS, et al. Liquid medication dosing errors in children: role of provider counseling strategies. Acad Pediatr. 2014;14(3):262–270. PubMed
Note: Conversions use average densities for the spoon-and-level method. Brands, humidity and packing change real weights. For best results, use a kitchen scale.