How many grams is 1 cup of all-purpose / plain flour?
1 US cup of all-purpose / plain flour is approximately 120 grams.
Cups to grams, for the ingredient you're actually holding
A cup of flour is 120g. A cup of honey is 340g. Pick the ingredient and get the weight that actually belongs to it.
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120g
All-purpose / plain flour · 4.23 oz
Grams
120g
Ounces
4.23oz
Cups
1
Tablespoons
16tbsp
1 cup all-purpose / plain flour = 120g. Spooned and levelled. Scooping straight from the bag packs in up to 145g.
Based on the US cup (236.6ml) and King Arthur Baking's published weights. Metric and imperial cups differ by a few percent — enough to matter in bread, not in soup.
Cups to grams chart for common ingredients
Grams per US cup. Cocoa powder and honey are both “one cup” and four times apart in weight, which is the whole argument for owning a scale.
Flour
- All-purpose / plain flour120g
- Bread flour128g
- Cake flour114g
- Whole wheat / wholemeal flour113g
- Almond flour96g
Sugar
- Granulated / caster sugar200g
- Brown sugar, packed213g
- Powdered / icing sugar113g
- Honey340g
- Maple syrup322g
Dairy & fat
- Butter227g
- Milk240g
- Heavy / double cream232g
- Greek yogurt245g
- Sour cream240g
- Cheddar, shredded113g
- Parmesan, finely grated90g
Liquid
- Water237g
- Vegetable / olive oil218g
Baking
- Cocoa powder85g
- Cornstarch / cornflour120g
- Chocolate chips170g
Other
- Rolled oats90g
- Rice, uncooked185g
- Breadcrumbs, dry108g
- Peanut butter258g
- Nuts, chopped120g
- Table salt292g
- Kosher salt (Diamond Crystal)142g
How to measure flour without a scale
Fluff the flour in its container with a fork, spoon it loosely into the cup until it mounds over the rim, then sweep the excess off with the back of a knife. Never tap the cup or press down — both pack the flour and quietly add 15–25% to the recipe.
Recipes that mix units mid-list
Video recipes are the worst offenders — cups for flour, grams for butter, “a splash” for the milk. When ReelsMeals extracts a recipe it keeps each measurement exactly as the creator gave it, so you can convert what you need and leave the rest alone. The recipe scaler handles the resizing.
Popular 1 cup to grams conversions
Quick answers for the ingredient conversions cooks search most often. These are US cups; choose a different amount or unit in the converter above.
How many grams is 1 cup of granulated / caster sugar?
1 US cup of granulated / caster sugar is approximately 200 grams.
How many grams is 1 cup of butter?
1 US cup of butter is approximately 227 grams.
How many grams is 1 cup of rice, uncooked?
1 US cup of rice, uncooked is approximately 185 grams.
How many grams is 1 cup of water?
1 US cup of water is approximately 237 grams.
How many grams is 1 cup of rolled oats?
1 US cup of rolled oats is approximately 90 grams.
Measurement basis: a US measuring cup is approximately 237ml, and ingredient weights follow published test-kitchen values where available. See the NIST capacity table and King Arthur Baking ingredient weight chart.
Common questions
How many grams is 1 cup of flour?
120g for all-purpose or plain flour, measured by spooning it into the cup and levelling the top. If you scoop the cup straight into the bag, you compress the flour and can end up with 145g or more — over 20% extra, which is enough to turn a tender cake dry.
Why can't I just use one cups-to-grams number for everything?
Because a cup measures volume and a gram measures weight, and the bridge between them is density. A cup of cocoa powder weighs 85g; a cup of honey weighs 340g. That is a fourfold difference from the same measuring cup, which is why any single conversion factor is wrong for almost every ingredient.
Is a US cup the same as a metric cup?
No. A US cup is 236.6ml, a metric cup is 250ml, and an imperial cup is 284ml. The gap between US and metric is about 6% — invisible in a stew, but enough to change hydration noticeably in bread dough or pastry.
Should I weigh ingredients instead of measuring cups?
For baking, yes. A scale removes every source of variation at once: how firmly you packed the cup, how settled the flour was, whose cup you borrowed. It is also less washing up, since you can tare between ingredients into one bowl.
How do I convert a recipe that only gives cups?
Convert each ingredient individually using its own density — that is what this tool does. If you need to change the yield at the same time, scale the ingredient list first and then convert, so the rounding only happens once.
Other free kitchen tools
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While you're here
The recipe you're converting probably came from a video.
ReelsMeals turns saved Reels, TikToks, YouTube links, and photos of paper cards into recipes you can search by ingredient.