Cup Fractions to Grams: ¼, ⅓, ½, ⅔ and ¾ Cup by Ingredient

Published October 9, 2026

Why « ½ cup » has no single answer

A cup measures volume — the space an ingredient occupies — and every ingredient packs that space differently. Butter fills it densely at 0.959 g/ml; rolled oats barely reach 0.38 g/ml. That is why « ½ cup in grams » gets a different answer on every ingredient page, and why this chart exists: it gathers the answers in one place, computed with the same densities the converters use — a US cup of 236.6 ml multiplied by each ingredient's bulk density.

The chart: ¼ cup to 1 cup in grams

All values assume a US cup (236.6 ml), level fill, and the sourced bulk density of each ingredient. Rounded to the gram; expect a few percent either way in a real kitchen — see the packing note further down.

• Butter: ¼ cup = 57 g · ⅓ = 76 g · ½ = 113 g · ⅔ = 151 g · ¾ = 170 g · 1 cup = 227 g
• All-purpose flour: ¼ cup = 31 g · ⅓ = 42 g · ½ = 63 g · ⅔ = 83 g · ¾ = 94 g · 1 cup = 125 g
• Granulated sugar: ¼ cup = 50 g · ⅓ = 67 g · ½ = 100 g · ⅔ = 133 g · ¾ = 150 g · 1 cup = 200 g
• Brown sugar (packed): ¼ cup = 55 g · ⅓ = 73 g · ½ = 110 g · ⅔ = 147 g · ¾ = 165 g · 1 cup = 220 g
• Powdered sugar: ¼ cup = 31 g · ⅓ = 42 g · ½ = 63 g · ⅔ = 84 g · ¾ = 94 g · 1 cup = 125 g
• Unsweetened cocoa powder: ¼ cup = 31 g · ⅓ = 41 g · ½ = 62 g · ⅔ = 82 g · ¾ = 92 g · 1 cup = 123 g
• Rolled oats: ¼ cup = 23 g · ⅓ = 30 g · ½ = 45 g · ⅔ = 60 g · ¾ = 67 g · 1 cup = 90 g
• White rice (raw): ¼ cup = 46 g · ⅓ = 61 g · ½ = 92 g · ⅔ = 123 g · ¾ = 138 g · 1 cup = 184 g
• Cornstarch: ¼ cup = 32 g · ⅓ = 43 g · ½ = 64 g · ⅔ = 85 g · ¾ = 96 g · 1 cup = 128 g
• Honey: ¼ cup = 84 g · ⅓ = 112 g · ½ = 168 g · ⅔ = 224 g · ¾ = 252 g · 1 cup = 336 g
• Maple syrup: ¼ cup = 79 g · ⅓ = 105 g · ½ = 157 g · ⅔ = 210 g · ¾ = 236 g · 1 cup = 315 g
• Molasses: ¼ cup = 82 g · ⅓ = 110 g · ½ = 164 g · ⅔ = 219 g · ¾ = 247 g · 1 cup = 329 g
• Whole milk: ¼ cup = 61 g · ⅓ = 81 g · ½ = 122 g · ⅔ = 162 g · ¾ = 183 g · 1 cup = 244 g
• Water: ¼ cup = 59 g · ⅓ = 79 g · ½ = 118 g · ⅔ = 158 g · ¾ = 177 g · 1 cup = 237 g
• Neutral oil: ¼ cup = 54 g · ⅓ = 72 g · ½ = 108 g · ⅔ = 145 g · ¾ = 163 g · 1 cup = 217 g
• Greek yogurt: ¼ cup = 70 g · ⅓ = 93 g · ½ = 140 g · ⅔ = 186 g · ¾ = 209 g · 1 cup = 279 g
• Sour cream: ¼ cup = 57 g · ⅓ = 76 g · ½ = 115 g · ⅔ = 153 g · ¾ = 172 g · 1 cup = 229 g
• Heavy cream: ¼ cup = 59 g · ⅓ = 78 g · ½ = 117 g · ⅔ = 156 g · ¾ = 176 g · 1 cup = 234 g

The formula behind every cell

Grams = cups × 236.6 × density. A ⅔ cup of all-purpose flour is 0.667 × 236.6 ml × 0.529 g/ml ≈ 83 g. Density is the only ingredient-specific input — which is why a generic « cup to grams » converter cannot answer a fraction query without asking what is in the cup. With a metric cup (250 ml, standard in Australia and modern UK recipes), multiply by 250 instead: the same ½ cup of flour becomes 66 g, not 63.

Packed, spooned, scooped: the ±10% reality

Bulk densities are averages, and the hand that measures moves them. Brown sugar is conventionally measured packed — pressed down, a cup holds ~220 g; poured loose, far less. Flour scooped straight from the bag compacts up to 10% over the spooned-and-leveled figure; sifted powdered sugar runs lighter still. Liquids like honey or milk barely vary (±3–5%), which is why recipes full of sticky ingredients are safer measured by weight. When the recipe is sensitive — bread, macarons — the gram column beats the cup column every time.

Small fractions hide in spoons

Below ¼ cup, American recipes switch to spoons: ¼ cup is exactly 4 tablespoons, ⅛ cup is 2 tablespoons, and a tablespoon is 3 teaspoons. So « ⅛ cup of cocoa » = 2 tbsp ≈ 15 g, and « ⅔ cup minus ⅓ cup » is a 4-tablespoon gap. When a recipe calls for a fraction your cup set does not carry — ⅔ or ⅙ — spoons get you closer than guessing between cup lines.

Let the converter carry the density

Every page in the converters section runs this same multiplication for one ingredient — cups, tablespoons, teaspoons, milliliters and ounces in both directions. When the fraction is unusual — 5/8 cup, 1.75 cups — the ingredient's own converter page is faster than any chart.