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Cups to Grams Converter
Instantly convert cups to grams for flour, sugar, butter, and 20+ baking ingredients with approximate reference weights for US, UK, and Metric recipes.
Instant Converted Result
144.1 g
Approximate reference weights from King Arthur Baking, Land O'Lakes butter measures and USDA household portions. Volume units follow NIST factors. Double cream needs a product-specific reference.
UK Fan Oven vs. Conventional Oven: Temperature Conversion Guide
Master UK Fan (Convection) vs Conventional oven temperatures, Gas Mark settings, and baking time adjustments for perfect cakes and roasts.
Quick Reference: Common British & Universal Baking Ingredients
Standard weight equivalents per fraction for key pantry staples (US Customary Cup baseline).
Because dry ingredients trap varying amounts of air and liquids have uniform mass density, 1 cup of flour weighs significantly less than 1 cup of sugar or butter. Refer to this quick density lookup table for approximate US-cup reference weights across standard recipe quantities:
| Ingredient Name | Category | 1/4 Cup | 1/2 Cup | 1 Full Cup |
|---|---|---|---|---|
| Plain Flour | Flours & Starches | 30g | 60g | 120g |
| Bread Flour | Flours & Starches | 30g | 60g | 120g |
| Cake Flour (unbleached reference) | Flours & Starches | 30g | 60g | 120g |
| Granulated Sugar | Sugars & Sweeteners | 49.5g | 99g | 198g |
| Caster Sugar | Sugars & Sweeteners | 47.5g | 95g | 190g |
| Brown Sugar (Packed) | Sugars & Sweeteners | 53.3g | 106.5g | 213g |
| Icing Sugar | Sugars & Sweeteners | 28.3g | 56.5g | 113g |
| Butter | Dairy & Fats | 56.7g | 113.4g | 226.8g |
| Rolled Oats | Baking & Pantry Staples | 22.3g | 44.5g | 89g |
| Cocoa Powder | Baking & Pantry Staples | 21g | 42g | 84g |
| Water | Dairy & Fats | 59.1g | 118.3g | 236.6g |
| Whole Milk (3.25% reference) | Dairy & Fats | 61g | 122g | 244g |
| Honey | Sugars & Sweeteners | 84g | 168g | 336g |
| Molasses | Sugars & Sweeteners | 85g | 170g | 340g |
How to Convert Cups to Grams for Baking
A step-by-step guide to estimating metric grams from recipe cups.
Converting cups to grams isn't a single universal calculation because volume measures space (milliliters) while grams measure mass (weight). Since 1 cup of granulated sugar is much denser than 1 cup of aerated flour, applying a single conversion multiplier causes major baking errors.
Select Your Ingredient
Always choose the exact ingredient first. Density dictates weight: 1 cup of granulated sugar is about 198g, while 1 cup of plain flour weighs only 120g.
Enter Your Recipe Amount
Input your required recipe measurement. Our calculator supports whole numbers, decimals, and fractional cup measures (e.g. 0.5 or 1.25 cups).
Get Instant Metric Precision
View approximate reference weights adjusted for your chosen regional cup standard (US, Metric, or UK Imperial).
Understanding Regional Cup Sizes for Gram Conversions
Why American, British, and Commonwealth recipes define 1 cup differently.
One of the most confusing aspects of international baking is that a "cup" is not standard worldwide. Depending on where your recipe originated, the fluid volume of a measuring cup varies significantly:
| Regional Standard | Volume (ml) | Flour Weight (1 Cup) | Sugar Weight (1 Cup) |
|---|---|---|---|
| Imperial / UK | 284.131 ml | Approx. 144.1g | Approx. 237.8g |
| Metric Cup | 250 ml | Approx. 126.8g | Approx. 209.2g |
| US Customary | 236.588 ml | Approx. 120g | Approx. 198g |
Why Weighing Ingredients in Grams Matters
The science of aeration and why volume scoop techniques produce inconsistent weights.
In professional British baking, digital kitchen scales are considered essential equipment. Measuring flour by volume introduces huge variances depending on how the cup is filled:
Common spoon-and-level method: Fluff flour first, gently spoon it into the cup and level with a knife edge. Our reference is approximately 120g per US cup.
Compacted Flour: Scooping straight from the bag can pack flour into the cup. Weigh it when the recipe needs a specific amount.
Aerated Structure: Sifting flour before measuring creates extra air pockets, making 1 cup weigh slightly less than standard un-sifted flour.
Common Cup to Gram Conversion Mistakes
Three frequent pitfalls to avoid when measuring baking ingredients by volume.
Mistake 1: Assuming 1 Cup = 240g for All Ingredients
The Fix: A US cup of water is about 236.6g using the approximate density of 1 g/ml. Our references use 84g per US cup of cocoa powder and 336g per US cup of honey.
Mistake 2: Scooping Flour Straight from the Bag
The Fix: Never scoop your measuring cup straight into a sack of flour. Fluff the flour (with a fork!), spoon it lightly into your measuring cup, and level off the top using the flat back of a butter knife.
Mistake 3: Treating All Sugars Identically
The Fix: Our references are 198g for granulated sugar, 190g for caster sugar, 213g for packed brown sugar and 113g for unsifted icing sugar per US cup. Never swap them 1:1 by volume!
Frequently Asked Questions
Answers to common conversion queries for home cooks and bakers.
How many grams are in 1 cup of plain flour?
One US customary cup of plain flour is about 120g in our spoon-and-level reference. Packing and brands change the weight; prefer the recipe’s gram amounts when available.
How many grams are in 1 cup of sugar?
US-cup reference weights differ by sugar: granulated 198g, caster 190g, packed brown sugar 213g and unsifted icing sugar 113g. These are approximate baking references.
How do I convert grams to cups using a formula?
Divide grams by the selected ingredient’s reference grams per cup. For example, 198g of granulated sugar is approximately one US customary cup in our reference. Different cup sizes need the corresponding volume adjustment.