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Cups to Grams Converter

Convert baking cups to exact grams and ounces based on true ingredient physical densities for consistent pastry and bread results.

Cups to Grams Baking Ingredient Converter

Convert recipe cup volumes to weight in grams and ounces using verified density tables from King Arthur Baking & USDA.

Standard wheat all-purpose flour (spooned and leveled).

Supports fractions or decimals (e.g. 1/4, 1/3, 1/2, 3/4, 1 1/2, or 2).

Common Kitchen Measures
Critical Measuring Technique: Spooned vs. Scooped

✓ Spooned & Leveled

~120g / cup

Fluffed with a fork, spooned lightly into cup, and leveled with a knife. Recipe standard.

✗ Dipped & Scooped

~140–150g / cup

Dipping the cup directly into the flour bag compacts it by 20–25%, causing dry, tough baked goods.

Source: King Arthur Baking Weight Chart & USDA FoodData Central (FDC ID 168893).

Calculated Weight
240 Grams

Equivalent to 8.47 oz for 2 cups of All-Purpose Flour

Metric Grams240 gKitchen digital scale
Ounces (Weight)8.47 ozAvoirdupois dry ounces
Standard Reference120 g/cupSpooned and leveled
Pounds Equivalent0.53 lbs1 lb = 453.6 grams
Calculation Steps
  • 1.Reference density for All-Purpose Flour: ~120 grams per US cup (King Arthur Baking Weight Chart & USDA FoodData Central (FDC ID 168893))
  • 2.Multiply cups by density: 2 cups × 120 g/cup = 240 grams
  • 3.Ounces equivalent (dry weight): 240 g ÷ 28.35 g/oz = 8.47 oz
  • 4.Technique note: Fluff with a fork, spoon into the measuring cup, and sweep level with a straight knife edge. Scooping directly from the sack packs up to 145–150g, causing dense, dry baked goods.
Why Professional Pastry Chefs Use Weight

Volume measuring cups are inherently imprecise for compressible dry goods like flour, cocoa, and brown sugar. Humidity, particle settling, and scooping force can alter cup weight by more than 25%. Weighing ingredients directly into the mixing bowl eliminates measuring cups, guarantees consistent recipe crumb structure, and speeds up kitchen cleanup.

Mathematical Formula & Calculation Method

Weight (Grams) = Cups × Ingredient Density (Grams per Cup)

Formula Components:

  • All-Purpose Flour: 120 grams per US cup (King Arthur & USDA FDC 168893, spooned & leveled)
  • Bread Flour: 125 grams per US cup
  • Granulated White Sugar: 200 grams per US cup
  • Packed Brown Sugar: 220 grams per US cup (Domino Sugar / King Arthur)
  • Unsalted Butter: 227 grams per cup (2 standard sticks = 8 oz)
  • Powdered Confectioners Sugar: 120 grams per cup (unsifted)
  • Unsweetened Cocoa Powder: 85 grams per cup
  • Rolled Oats: 90 grams per cup

How It Works

1

Choose conversion direction: Cups → Grams or Grams → Cups.

2

Select your baking ingredient from the standardized density database.

3

Enter the quantity of cups (fractions like 1/2 or 1 1/2 supported) or grams.

4

View accurate digital scale grams, avoirdupois dry ounces, and baker’s measuring tips.

Practical Calculation Examples

2.5 Cups of All-Purpose Flour to Grams (Spooned & Leveled)

Baking sourdough bread using a digital kitchen scale.

Step 1:Flour density: 1 cup = 120 grams (King Arthur & USDA spooned & leveled standard).
Step 2:Calculate: 2.5 cups × 120 g/cup = 300 grams.
Outcome: 2.5 cups of all-purpose flour equals 300 grams (10.58 oz).

1 Cup of Packed Brown Sugar to Grams

Measuring brown sugar for chocolate chip cookies.

Step 1:Brown sugar density: 1 cup packed = 220 grams.
Step 2:Calculate: 1.0 × 220 = 220 grams.
Outcome: 1 cup packed brown sugar equals 220 grams (7.76 oz).

Important Assumptions & Estimator Guidance

  • Bulk densities calibrated to King Arthur Baking Company Master Weight Chart and USDA FoodData Central (FDC ID 168893).
  • All-purpose flour is assumed spooned and leveled at 120g/cup; dipping the measuring cup directly into the flour sack packs 140–150g, causing dry, heavy baked goods.
  • Brown sugar assumes standard firmly packed density (holds cup shape when inverted).
  • Butter is converted at standard US stick density (1 cup = 2 sticks = 8 oz = 227g).
  • Liquid measures (water, milk) use US legal cup definition of 240 mL (240g water).

Common Pitfalls & Mistakes to Avoid

Scooping flour directly with the measuring cup

Scooping flour packs it down tightly, packing up to 150g into a 1-cup measure (a 25% error that makes baked goods dry and dense).

Correction: Fluff flour with a fork, spoon it into the measuring cup, and sweep the excess level with a butter knife.
In-Depth Companion Guide

How to Scale a Recipe Up or Down

Scale culinary recipes accurately: serving conversion ratios, fraction math, volume to weight adjustments, and ingredients that do not scale linearly.

Read Companion Guide

Frequently Asked Questions

Flour can vary in volume by up to 30% depending on humidity and how tightly it is packed in a cup. A kitchen scale reading grams is 100% repeatable and foolproof.

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