Cups to Grams Calculator
Convert cups, tablespoons, teaspoons, sticks or mL to grams and ounces — or grams back to cups — with real densities for 97 ingredients: flours, sugars, butter, oils, dairy, nuts, grains and more.
How it works
grams = cups × grams per cup (ingredient density) · cups = grams ÷ grams per cup · 1 cup = 16 tbsp = 48 tsp = 8 fl oz = 236.6 mL · ounces = grams ÷ 28.35
Cups measure volume, grams measure weight, and the bridge between them is density — which is different for every ingredient. A cup of packed brown sugar (220 g) weighs two and a half times a cup of cocoa powder (85 g), and a cup of honey (340 g) weighs almost three times a cup of all-purpose flour (120 g). The calculator multiplies the amount you enter by the grams-per-cup figure for the ingredient, or divides a weight by it to get cups, and shows the result in grams, ounces, tablespoons and millilitres along with a measuring-cup breakdown such as “½ cup + 2 tbsp”. Amounts can be typed in cups, tablespoons, teaspoons, fluid ounces, millilitres, litres, 250 mL metric cups or sticks of butter. Flours, sugars, nuts and mix-ins follow the King Arthur Baking ingredient weight chart (spooned and leveled); liquids, fats and dairy use USDA FoodData Central weights. For flours and powders you can switch to “scooped” or “sifted” to see how much the fill method changes the weight.
Worked example
One cup of all-purpose flour weighs 120 g, about 4.2 oz; the same cup of granulated sugar weighs 200 g. Three tablespoons of butter is 3 ÷ 16 = 0.1875 cup × 227 g = 42.6 g. Going the other way, 250 g of all-purpose flour is 250 ÷ 120 = 2.08 cups — measure 2 cups plus 1 tablespoon plus 1 teaspoon.
Sources: King Arthur Baking — Ingredient weight chart · USDA FoodData Central — food portion weights · NIST — Culinary measurement conversions (US cup = 236.6 mL)
Frequently asked questions
Why do bakers prefer weight over cups?
Scooping technique alone can swing flour by ±20%, which is the difference between tender and dense. A scale removes the variable entirely and makes recipes repeatable.
How many grams are in a cup?
It depends on the ingredient: about 237 g of water, 120 g of all-purpose flour, 200 g of granulated sugar, 227 g of butter and 85 g of cocoa powder. A cup is a volume (236.6 mL), so only water-like liquids come close to 1 g per mL.
Are weight ounces the same as fluid ounces?
No. Fluid ounces measure volume (a cup is 8 fl oz for any liquid); weight ounces measure mass. A cup of milk is 8 fl oz but weighs about 8.5 oz — for water-like liquids they are close, for everything else they diverge.
How many grams is a stick of butter?
A US stick is ½ cup, 8 tablespoons or 113 g (4 oz). Pick “sticks of butter” in the unit menu to convert directly.
Do these numbers work for UK or Australian recipes?
Use the “metric cups (250 mL)” unit for recipes written with metric cups. Watch spoons too: an Australian tablespoon is 20 mL instead of 15, so convert via the gram weights the recipe lists when it gives them.
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This calculator is for educational purposes. Double-check important results before acting on them.