One Third Cup in Grams: ⅓ Cup Conversion for Every Common Ingredient
⅓ US cup of all-purpose flour = 42 g. ⅓ cup of granulated sugar = 67 g. ⅓ cup of butter = 76 g. ⅓ cup of whole milk = 81 g. ⅓ cup of honey = 113 g.
What is ⅓ cup?
A third of a cup is a common measurement in US recipes. Because it measures volume, ⅓ cup of flour weighs roughly 42 g while ⅓ cup of honey weighs 113 g. This page gives the gram weight for one third cup of every common ingredient using the US cup (78.9 ml) and the metric cup (83.3 ml), plus a reference table for 2/3 cup.
A third cup is one third of the cup unit — 78.863 ml US and 83.333 ml metric. One third cup is approximately 5 tablespoons plus 1 teaspoon (US), making it the least divisible of the common cup fractions. Weighing by grams is especially reliable at this fraction.
US cup (⅓ cup): 78.9 ml · Metric cup (⅓ cup): 83.3 ml · ⅓ cup = 5⅓ US tablespoons = 16 US teaspoons
⅓ cup in grams — all 47 ingredients
All US cup values use the spoon-and-level method for dry ingredients and direct measure for liquids. US cup = 236.588 ml. Metric cup = 250 ml.
| Ingredient | ⅓ cup — US cup (236.6 ml) | ⅓ cup — Metric cup (250 ml) |
|---|---|---|
| All-purpose flourFlour | 42 g | 44 g |
| Bread flourFlour | 42 g | 45 g |
| Cake flourFlour | 35 g | 37 g |
| Whole wheat flourFlour | 43 g | 46 g |
| Almond flourFlour | 32 g | 34 g |
| Coconut flourFlour | 37 g | 39 g |
| Rye flourFlour | 34 g | 36 g |
| Self-raising flourFlour | 42 g | 44 g |
| Oat flourFlour | 31 g | 32 g |
| Granulated sugarSugar | 67 g | 70 g |
| Caster sugarSugar | 67 g | 70 g |
| Brown sugar (packed)Sugar | 73 g | 77 g |
| Brown sugar (loose)Sugar | 65 g | 69 g |
| Icing / powdered sugarSugar | 40 g | 42 g |
| Raw / turbinado sugarSugar | 67 g | 70 g |
| ButterFat | 76 g | 80 g |
| Vegetable oilFat | 73 g | 77 g |
| Olive oilFat | 72 g | 76 g |
| Coconut oil (melted)Fat | 73 g | 77 g |
| WaterLiquid | 79 g | 83 g |
| Whole milkLiquid | 81 g | 86 g |
| Heavy creamLiquid | 79 g | 84 g |
| ButtermilkLiquid | 81 g | 85 g |
| HoneyLiquid | 113 g | 120 g |
| Maple syrupLiquid | 104 g | 110 g |
| Cream cheeseDairy | 75 g | 79 g |
| Greek yogurtDairy | 82 g | 86 g |
| Sour creamDairy | 77 g | 81 g |
| RicottaDairy | 82 g | 87 g |
| Almonds (whole)Nuts | 48 g | 50 g |
| Walnuts (chopped)Nuts | 39 g | 41 g |
| Peanut butterNuts | 86 g | 91 g |
| Almond butterNuts | 86 g | 91 g |
| TahiniNuts | 80 g | 85 g |
| Rolled oatsGrains | 30 g | 32 g |
| CornmealGrains | 46 g | 49 g |
| Rice (white, dry)Grains | 62 g | 65 g |
| Quinoa (dry)Grains | 62 g | 65 g |
| CornstarchGrains | 43 g | 45 g |
| Cocoa powderBaking | 33 g | 35 g |
| Baking powderBaking | 64 g | 68 g |
| Salt (table)Baking | 97 g | 103 g |
| Breadcrumbs (dry)Baking | 38 g | 41 g |
| Chocolate chipsOther | 56 g | 59 g |
| Shredded coconutOther | 25 g | 26 g |
| RaisinsOther | 55 g | 58 g |
| Shredded cheeseOther | 38 g | 40 g |
A cup measures volume. Different ingredients have different densities, so the same volume holds different masses. This is why ⅓ cup of honey weighs far more than ⅓ cup of flour.
US cup vs metric cup: ⅓ cup in grams
The metric cup (250 ml) is 5.7 percent larger than the US cup (236.6 ml). The table below shows the gram difference for 15 key ingredients.
| Ingredient | US cup (78.9 ml) | Metric cup (83.3 ml) | Difference |
|---|---|---|---|
| All-purpose flour | 42 g | 44 g | +2 g |
| Bread flour | 42 g | 45 g | +3 g |
| Cake flour | 35 g | 37 g | +2 g |
| Whole wheat flour | 43 g | 46 g | +3 g |
| Granulated sugar | 67 g | 70 g | +3 g |
| Brown sugar (packed) | 73 g | 77 g | +4 g |
| Icing / powdered sugar | 40 g | 42 g | +2 g |
| Butter | 76 g | 80 g | +4 g |
| Vegetable oil | 73 g | 77 g | +4 g |
| Water | 79 g | 83 g | +4 g |
| Whole milk | 81 g | 86 g | +5 g |
| Heavy cream | 79 g | 84 g | +5 g |
| Honey | 113 g | 120 g | +7 g |
| Rolled oats | 30 g | 32 g | +2 g |
| Cocoa powder | 33 g | 35 g | +2 g |
US recipes use 236.6 ml. Australian, Canadian, and New Zealand recipes use 250 ml. See the full cup sizes guide.
Cup fraction relationships
⅓ cup in context — how it relates to other common cup fractions (US customary standard).
| Cup Fraction | Volume (US) | Relationship |
|---|---|---|
| ⅔ cup | 157.7 ml | Double of ⅓ cup |
| ¼ cup | 59.1 ml | Smaller by 19.8 ml |
| ½ cup | 118.3 ml | Larger by 39.4 ml |
| 1 cup | 236.6 ml | Three times ⅓ cup |
2/3 cup in grams (section reference)
Two thirds cup (2/3 cup) is 157.725 ml US and 166.667 ml metric. It equals 10 tablespoons plus 2 teaspoons (US). Gram weights for key ingredients at the 2/3-cup mark:
| Ingredient | 2/3 cup |
|---|---|
| All-purpose flour | 83 g |
| Bread flour | 85 g |
| Cake flour | 70 g |
| Whole wheat flour | 87 g |
| Granulated sugar | 133 g |
| Brown sugar (packed) | 147 g |
| Icing / powdered sugar | 80 g |
| Butter | 151 g |
| Vegetable oil | 145 g |
| Water | 158 g |
| Whole milk | 163 g |
| Heavy cream | 159 g |
| Honey | 227 g |
| Rolled oats | 60 g |
| Cocoa powder | 67 g |
Convert any gram amount to cups →Ingredient-specific density · US and metric cup options
Frequently asked questions
How many grams is 1/3 cup of flour?
One third of a US cup of all-purpose flour weighs approximately 42 g. Bread flour is 42 g, cake flour is 35 g, whole wheat flour is 43 g per third cup.
How many grams is ⅓ cup of sugar?
One third cup of granulated sugar weighs 67 g. Packed brown sugar is 73 g. Icing sugar is 40 g per third cup.
How many grams is ⅓ cup of butter?
One third cup of butter weighs 76 g — approximately two thirds of a US butter stick.
How many ml is ⅓ cup?
One third of a US cup is 78.863 ml. One third of a metric cup (Australia) is 83.333 ml.
Is ⅓ cup 5 tablespoons plus 1 teaspoon?
Yes. In the US system, 1/3 cup equals 5 tablespoons plus 1 teaspoon. This awkward fraction makes weighing preferable.
How many grams is 2/3 cup of flour?
Two thirds of a US cup of all-purpose flour weighs approximately 83 g. See the 2/3 cup reference table on this page.
Is ⅓ cup the same in Australia and the US?
No. One third of a US cup is 78.9 ml. One third of a metric cup is 83.3 ml — about 4.4 ml larger.
Why is ⅓ cup harder to measure accurately?
Because 1/3 does not divide evenly into tablespoons, small fill errors compound. A kitchen scale eliminates this issue.