1 cup all-purpose flour in grams
- Ingredient
- All-purpose flour
- Amount
- 1
- From
- US cup (cup)
- To
- gram (g)
- Converted amount
- 120 g
Checked against: King Arthur chart: all-purpose flour, 1 cup = 120 g
Cups to grams converter for cooking and baking
Convert cups to grams, and grams to cups, for 27 baking ingredients including flour, sugar and butter, using King Arthur Baking and USDA weight charts.
By AdminDrafted with AI writing toolsUpdated Checked examples: 7
Converted amount
g
Converted amount: 120 g
- Conversion
- 1 cup of All-purpose flour ≈ 120 g
- Weight
- 120g
- Volume
- 236.6mL
- Density used
- 0.5072g/mL
Measured volumes depend on packing: flour scooped straight from the bag weighs more than flour spooned into the cup and levelled, and the chart's brown sugar is packed. Weigh ingredients when a recipe gives grams.
1 cup of All-purpose flour ≈ 120 g. All-purpose flour weighs about 0.507 g per mL (120 g per US cup), per the King Arthur Baking ingredient weight chart.
What 1 cup of each ingredient weighs
How it's calculated S
Density from the chart
King Arthur Baking ingredient weight chart: 1 cup = 120 g
Volume to weight
About the cups to grams converter
First convert a cup, spoon or millilitre measure to millilitres, then multiply by the ingredient’s density in grams per millilitre to get grams; convert that mass to ounces if needed. In reverse, convert mass to grams before dividing by density. Each density is worked out from a published chart entry: all-purpose flour at 120 g per US cup is 0.507 g/mL, while water is approximated as 1 g/mL in this culinary model.
Use it to weigh a cup-based recipe on a kitchen scale, or to measure a gram recipe with cups. The default, 1 US cup of all-purpose flour, gives 120 g; the same cup holds 198 g of granulated sugar and 336 g of honey. Converting cups to tablespoons or millilitres needs no density, because both sides are volumes.
Results are typical values, not guarantees. Flour scooped straight from the bag packs down and weighs more than flour spooned in and levelled, so weigh whenever a recipe already gives grams.
In the formula, m is mass in grams, V is volume in millilitres and ρ is density in g/mL. The chart's mass m₀ and volume V₀ determine the density.
How to convert cups to grams
Multiply the cups by the ingredient's weight per cup. A US cup of all-purpose flour weighs 120 g and one of granulated sugar 198 g, so 2 cups of flour ≈ 240 g. Each ingredient needs its own figure, because a cup measures volume, not weight.
How many grams are in a cup?
Weights for one US cup, from King Arthur Baking's ingredient weight chart unless noted:
- Flour: all-purpose, bread and cake flour 120 g; whole wheat 113 g; almond 96 g.
- Sugar: granulated 198 g; brown sugar, packed, 213 g; confectioners' 113 g.
- Butter: 226 g, two US sticks of 8 tablespoons at 113 g each.
- Honey: 336 g, from 21 g per tablespoon.
- Rolled oats 89 g, chocolate chips 170 g, raisins 149 g.
- Whole milk 244 g and water 236.6 g, from USDA FoodData Central.
How cup-to-gram conversion works
A chart weight fixes the ingredient's density. For all-purpose flour, 120 g ÷ 236.5882365 mL ≈ 0.50721 g/mL. Weight is volume × density, and volume is weight ÷ density:
- 100 g of granulated sugar is 100 ÷ 198 ≈ 0.505 cup, just over half a cup.
- One tablespoon of butter is 113 g ÷ 8 = 14.125 g.
- A 250 mL metric cup of all-purpose flour holds 250 × 0.50721 ≈ 126.8 g.
Volume-to-volume conversions need no density: 3 teaspoons make 1 tablespoon whatever the ingredient. Amounts can be typed as kitchen fractions, such as 1 1/2 or 3/4.
Cups to grams chart
| Ingredient | Amount | From | To | Converted amount |
|---|---|---|---|---|
| All-purpose flour | 1 | US cup | g | 120 |
| Granulated sugar | 1 | US cup | g | 198 |
| Brown sugar (packed) | 1 | US cup | g | 213 |
| Butter | 1 | US tablespoon | g | 14.125 |
| Honey | 1 | US tablespoon | g | 21 |
| Granulated sugar | 100 | g | US cup | 0.505051 |
The sugar-to-cup row is rounded to six decimal places.
US cup, metric cup or 240 mL cup?
- US customary cup: 236.5882365 mL, half a US liquid pint (NIST Handbook 44). The cup weights above use this cup.
- US nutrition-label cup: 240 mL under 21 CFR 101.9, about 1.4% larger.
- Metric cup: 250 mL, used in Australia, Canada and New Zealand, about 5.7% larger than the US customary cup. Under this chart-based density model, a metric cup of packed brown sugar is about 225 g instead of 213 g.
A US tablespoon is 1/16 cup (14.79 mL) and a teaspoon a third of that (4.93 mL). An Australian tablespoon is 20 mL. For a 240 mL cup or a 20 mL spoon, convert from milliliters.
Common mistakes with cups
- Scooping flour from the bag. It packs down and weighs more than flour spooned into the cup and leveled.
- Leaving brown sugar loose. The 213 g figure is for packed brown sugar.
- Converting a gram recipe to cups. The grams are already the exact amount; measuring by cup brings the packing error back.
- Mixing ounces and fluid ounces. A cup is 8 US fl oz of volume, but a cup of flour weighs about 4.2 oz.
Related converters
Use the volume converter for cups, pints and liters, the weight converter for grams, ounces and pounds, and the recipe scaler to change the number of servings.
Worked examples
100 g sugar in cups
- Ingredient
- Granulated sugar
- Amount
- 100
- From
- gram (g)
- To
- US cup (cup)
- Converted amount
- 0.5051 cup
Checked against: King Arthur chart: 1 cup granulated sugar = 198 g; 100/198 ≈ 0.50505
1 tablespoon butter in grams
- Ingredient
- Butter
- Amount
- 1
- From
- US tablespoon (tbsp)
- To
- gram (g)
- Converted amount
- 14.13 g
Checked against: King Arthur chart: 8 tbsp butter = 113 g; 113/8 = 14.125
1 cup whole milk in grams
- Ingredient
- Whole milk
- Amount
- 1
- From
- US cup (cup)
- To
- gram (g)
- Converted amount
- 244 g
Checked against: USDA FoodData Central 171265: 1 cup = 244 g
Questions
How many grams are in a cup of flour?
About 120 g for all-purpose or bread flour, according to King Arthur Baking's ingredient weight chart. Whole wheat flour is lighter at 113 g per US cup and almond flour lighter still at 96 g. Flour compresses, so a cup scooped straight from the bag can weigh noticeably more than one spooned in and levelled; when a recipe gives grams, weigh instead of converting back to cups.
How many grams of sugar are in a cup?
198 g of granulated sugar fill one US cup (King Arthur Baking chart). Packed brown sugar is heavier at 213 g, and confectioners' (icing) sugar is lighter at 113 g because its fine powder holds more air. Going the other way, 100 g of granulated sugar is 0.505 cup, just over half a cup.
Is a cup 236.6 mL, 240 mL or 250 mL?
All three conventions are in use. The US customary cup is exactly 236.5882365 mL, half a US liquid pint (NIST Handbook 44). US nutrition labelling defines a cup as 240 mL (21 CFR 101.9). The metric cup common in Australian, Canadian and New Zealand recipes is 250 mL, approximately 5.7% larger than the US customary cup. In this chart-based packed-brown-sugar model, a metric cup is about 225 g rather than 213 g.
How many grams is a tablespoon of butter?
About 14 g. A US stick of butter is 8 tablespoons, half a cup or 113 g (4 oz), so each tablespoon weighs 113 ÷ 8 ≈ 14.1 g (King Arthur Baking chart). The US tablespoon is 14.8 mL; an Australian tablespoon is 20 mL, so for Australian recipes enter 20 mL per tablespoon instead.
About this calculator
Sources
Checked against references
This calculator includes 7 worked examples with independently sourced answers. They run in the test suite, and you can run them here too.