Cups to grams converter
Cups to grams: pick the amount and ingredient – the result appears instantly in grams, plus the same amount in spoons and other cup sizes. Works the other way round too.
Example: Amount 1 · From: cup (US, 236.6 ml) · Ingredient: all-purpose flour · To: g → Result: 1 cup (US, 236.6 ml) all-purpose flour = 125 g. Source: USDA ARS – Nutritive Value of Foods, Home and Garden Bulletin 72 (Gebhardt & Thomas, 2002): Gramm je Tasse/Löffel. Updated: .
How it is calculated
In short: One US cup is 236.6 ml. Its weight depends on the ingredient: 1 cup of all-purpose flour weighs about 125 g, 1 cup of granulated sugar 200 g, 1 cup of butter 226 g and 1 cup of whole milk 244 g (USDA). This converter uses those weights to turn cups, tablespoons and teaspoons into grams – and grams back into cups.
How it works
- Enter the amount, e.g. 1.5 or 0.75.
- Under “From” choose the unit in your recipe – US recipes mean the US cup.
- Choose the ingredient. Not listed? Pick “custom density” and enter grams per milliliter.
- Under “To” choose grams, ml or spoons. The table shows the same amount in other measures.
How it is calculated
Volumes convert exactly: 1 US cup = 236.588 ml = 16 tablespoons = 48 teaspoons (NIST SP 811). Nutrition labels use a 240 ml cup; Australia, Canada and the UK use a 250 ml metric cup, Japan 200 ml, and an Australian tablespoon holds 20 ml. Converting between weight and volume needs the ingredient’s density: grams per cup come from the USDA bulletin “Nutritive Value of Foods”, e.g. flour spooned and leveled 125 g, sifted 115 g, packed brown sugar 220 g. 125 g per 236.588 ml gives 0.528 g/ml for flour.
Honest limits
Cup measures are imprecise: scooping flour straight from the bag packs it down and can add 20 %. For baking, weigh whenever you can. Oats, cocoa and nuts are not listed because we found no solid primary source for their cup weights – use “custom density” for those.
Frequently asked questions
How many grams is 1 cup of flour?
About 125 g of all-purpose flour, spooned into the cup and leveled (USDA). Sifted flour is about 115 g; scooped and packed flour can be much more.
How many grams is 1 cup of sugar?
1 cup of granulated sugar weighs 200 g, 1 cup of packed brown sugar 220 g and 1 cup of unsifted powdered sugar 120 g (USDA).
How many grams is 1 cup of butter?
226 g. One stick of butter is ½ cup, 113 g or 8 tablespoons.
How many grams is 1 cup of water?
About 237 g – water weighs roughly 1 g per ml, and a US cup holds 236.6 ml.
How many grams is 1 cup of rice?
About 185 g of uncooked long-grain white rice (USDA). A cup of cooked rice weighs only about 158 g.
Is a US cup the same as a metric cup?
No. A US cup is 236.6 ml, a metric cup (Australia, Canada, UK) 250 ml – about 6 % more. For most cooking the difference is small, for baking it matters.
Sources and legal basis
- USDA ARS – Nutritive Value of Foods, Home and Garden Bulletin 72 (Gebhardt & Thomas, 2002): Gramm je Tasse/Löffel
- NIST SP 811, Appendix B.9 – Conversion factors (cup, tablespoon, teaspoon, fluid ounce, pint, gallon UK, ounce, pound)
- 21 CFR 101.9(b)(5)(viii) – Nutrition labeling: 1 cup = 240 mL, 1 tbsp = 15 mL, 1 tsp = 5 mL
- Wikipedia – Cup (unit): metric cup 250 mL, Japanese cup 200 mL
- Wikipedia – Cooking weights and measures: Australian tablespoon 20 mL
As of:
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