Cups to Grams Converter
Instantly convert cups to grams for flour, sugar, butter, and 20+ baking ingredients with accurate density measurements for US, UK, and Metric recipes.
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 exact metric conversions across standard recipe quantities:
| Ingredient Name | Category | 1/4 Cup | 1/2 Cup | 1 Full Cup |
|---|---|---|---|---|
| Plain / All-Purpose Flour | Flour | 30g | 60g | 120g |
| Bread Flour | Flour | 30g | 60g | 120g |
| Cake Flour | Flour | 27g | 54g | 108g |
| Granulated & Caster Sugar | Sugar | 50g | 100g | 200g |
| Packed Brown Sugar | Sugar | 55g | 110g | 220g |
| Icing / Powdered Sugar | Sugar | 30g | 60g | 120g |
| Unsalted Butter | Fats & Dairy | 58.8g | 113.5g | 227g |
| Rolled Oats | Pantry | 22.5g | 45g | 90g |
| Cocoa Powder | Pantry | 21.3g | 42.5g | 85g |
| Water / Milk | Liquid | 60g | 120g | 240g |
| Honey / Molasses | Liquid | 85g | 170g | 340g |
How to Convert Cups to Grams for Baking
A step-by-step guide to converting volumetric recipe cups into precise metric grams.
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 sugar weighs 200g, 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
Instantly view density-accurate metric 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) |
|---|---|---|---|
| US Customary Cup (Default) | 236.6 ml (240 ml rounded) | 120g – 125g | 200g |
| Metric Cup (Commonwealth / AU / NZ) | 250 ml | 132g – 140g | 211g |
| Imperial Cup (Vintage UK / Pre-1970s) | 284.1 ml | 150g | 240g |
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 into cup and level with the knife edge gives 120g correct cups.
Compacted Flour Mistake: Scooping a cup straight from the bag causes flour to pack tightly against the bowl, adding up to 30g of extra flour per cup!
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: Only equivalent to water, milk, and very high-water liquids; 1 cup = ~240g if density is equal to 1.0 g/ml. Volume of dry ingredients varies between 85g (cocoa powder) and 340g for honey in a cup.
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: Granulated and caster sugars pack tightly (200g/cup), brown sugar must be firmly pressed into the cup (220g/cup), and icing/powdered sugar is super light and fluffy (120g/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 (all-purpose) flour weighs about 120 grams when measured using the professional "spoon-and-level" method. A cup can be 145g–150g packed straight from a bag resulting in dense, dry baked goods.
How many grams are in 1 cup of sugar?▼
Sugar weights vary based on type of sugar and density: 1 cup of castor (granulated) or caster sugar = 200g; packed brown sugar = 220g; icing/powdered sugar = 120g.
So how can we convert grams to cups with a mathematical formula?▼
To perform your own Gram to Cup conversions, please use the following equation: Volume (cup) = Weight (g) ÷ (Density (g/ml) × cup size volume in ml). Example: 200g sugar (US cups) = 200 / (0.845 × 236.6) = ~1 cup.