Cups to grams
A cup measures volume, so how many grams it holds depends on the ingredient: a cup of flour is about 120 g, a cup of sugar about 198 g and a cup of honey about 339 g. Pick an ingredient below to convert any amount.
All-purpose flour cups to grams converter
All-purpose flour: 1 US cup ≈ 120 g · source: King Arthur Baking
Cup sizes: US customary cup 236.588 mL (default) · metric cup 250 mL (Australia, Canada, New Zealand) · UK imperial cup 284.13 mL. Pick the cup in the unit list. Weights vary with how the cup is filled.
How it’s calculated
1 US cup of flour ≈ 120 g · 1 tbsp ≈ 7.5 g · 1 metric cup (250 mL) ≈ 126.8 g · 1 UK cup (284 mL) ≈ 144.11 g
grams = US cups × 120
Step by step
- Multiply by the weight of one cup: 1 × 120 g = 120 g.
Spoon the flour into the cup and level it with a knife. Scooping straight from the bag packs it down, so the cup holds noticeably more flour than the recipe expects. Weighing is more accurate than cups; weights vary with how the cup is packed.
Cups to grams chart
| Ingredient | 1 US cup | ½ cup | 1 tbsp | Metric cup (250 mL) |
|---|---|---|---|---|
| All-purpose flour | 120 g | 60 g | 7.5 g | 126.8 g |
| Granulated sugar | 198 g | 99 g | 12.375 g | 209.22 g |
| Brown sugar (packed) | 213 g | 106.5 g | 13.313 g | 225.07 g |
| Powdered sugar | 113 g | 56.5 g | 7.0625 g | 119.41 g |
| Butter | 227 g | 113.5 g | 14.188 g | 239.87 g |
| White rice (uncooked) | 185 g | 92.5 g | 11.563 g | 195.49 g |
| Rolled oats | 89 g | 44.5 g | 5.5625 g | 94.045 g |
| Honey | 339 g | 169.5 g | 21.188 g | 358.22 g |
| Milk | 244 g | 122 g | 15.25 g | 257.83 g |
FAQ
Every figure comes from a published weight chart (King Arthur Baking or USDA FoodData Central) and is linked under Sources. Weighing is always more accurate than measuring by cup.
How many grams is a cup?
It depends on the ingredient. A US cup of water weighs 236.6 g, a cup of all-purpose flour about 120 g, granulated sugar about 198 g and butter about 227 g.
Which cup does this use?
The US customary cup (236.588 mL) by default. You can switch to the 250 mL metric cup used in Australia, Canada and New Zealand, or the 284 mL British imperial cup.
Why weigh ingredients instead of using cups?
Cups vary with how you fill them: flour scooped straight from the bag weighs noticeably more than flour spooned in and levelled. Recipes from bakers and most UK and European recipes use grams for that reason.
Where do the gram figures come from?
Unitglide uses the King Arthur Baking ingredient weight chart and USDA FoodData Central household measures; each ingredient page links its source.
Sources
- King Arthur Baking, Ingredient Weight Chart: Ingredient weights per cup.
- USDA FoodData Central: Household measures for butter, rice, honey and milk.
- NIST Handbook 44, Appendix C: 1 US cup = 8 US fl oz = 236.5882365 mL; 1 tbsp = 3 tsp.
Checked by Unitglide on 2026-10-27.
Related conversions
- All-purpose flour: cups to grams
- Granulated sugar: cups to grams
- Brown sugar (packed): cups to grams
- Powdered sugar: cups to grams
- Butter: cups to grams
- White rice (uncooked): cups to grams
- Rolled oats: cups to grams
- Honey: cups to grams
- Milk: cups to grams
- All-purpose flour: grams to cups
- Granulated sugar: grams to cups
- Butter: grams to cups
- US cups to millilitres
- Gas mark conversion chart