Cups to Grams Converter
Precisely convert cups to grams for over 50 cooking and baking ingredients. Our converter accounts for ingredient density — because 1 cup of flour (125g) is very different from 1 cup of sugar (200g).
Quick reference: All-purpose flour
125g
= 1 cup
7.81g
= 1 tbsp
2.6g
= 1 tsp
4.41oz
= 1 cup
Like this tool?
MealMatics creates personalized meal plans that match your nutrition goals. AI-powered, medically-aware, 20+ diet types supported.
Try MealMatics FreeHow to Convert Cups to Grams
The idea for this converter came from a frustration we kept seeing in baking forums: someone plugs 'one cup of almond flour' into a generic converter and gets 240 grams — the density of water — when the real number is 96 grams, less than half. That kind of error turns macaron shells into dense little hockey pucks. King Arthur Baking's ingredient weight chart lists all-purpose flour at 120 grams per cup, but scooping technique alone can push that number up to 155 grams — a variance of nearly 30 percent from one measuring cup. The USDA's FoodData Central database lists distinct density values for thousands of food items, and the differences between common baking staples are staggering: one cup of granulated sugar clocks in at 200 grams, one cup of honey hits 340 grams, and one cup of cocoa powder barely reaches 86 grams.
We get emails from people who followed a British baking recipe, used their American measuring cups, and ended up with pancake batter instead of scone dough — and the root cause is always the same 10 to 15 percent flour variance that King Arthur Baking documents in their weight guide. Scoop aggressively from the bag and you pack in 155 grams per cup; spoon gently and you get 120. That gap wrecks anything where ratios matter, which is exactly why Serious Eats and America's Test Kitchen started printing gram weights next to every cup measurement on their sites. Gram scales cost eight dollars on Amazon now, but most American kitchens still do not own one — so when you are mid-recipe with a European cookbook open and a set of US cups in hand, you need a converter that knows cocoa powder is not the same density as butter.
Cups to Grams — Quick Reference Chart
| Ingredient | 1 Cup | ½ Cup | ¼ Cup |
|---|---|---|---|
| All-purpose flour | 125g | 63g | 31g |
| Granulated sugar | 200g | 100g | 50g |
| Brown sugar (packed) | 220g | 110g | 55g |
| Powdered sugar | 120g | 60g | 30g |
| Butter | 227g | 114g | 57g |
| Milk | 245g | 123g | 61g |
| Honey | 340g | 170g | 85g |
| Rolled oats | 90g | 45g | 23g |
| Rice (uncooked) | 185g | 93g | 46g |
| Cocoa powder | 86g | 43g | 22g |
Frequently Asked Questions
How many grams is 1 cup of flour?
1 cup of all-purpose flour weighs approximately 125 grams. Bread flour weighs slightly more at 130g per cup, and cake flour is lighter at 114g per cup.
How many grams is 1 cup of sugar?
1 cup of granulated white sugar weighs 200 grams. Brown sugar (packed) weighs 220g per cup, and powdered sugar weighs 120g per cup.
Why is a cup of flour lighter than a cup of sugar?
Flour particles are irregularly shaped and trap a lot of air between them, making flour less dense. Sugar granules are more uniform and pack together tightly, resulting in a heavier cup.
Is this converter accurate for baking?
Yes. Our data comes from USDA FoodData Central and professional baking references. For maximum baking precision, we recommend using a kitchen scale.
What size cup does this converter use?
We use the US customary cup (236.588 ml). This is different from the metric cup (250 ml) used in Australia.