Cups to Grams Converter

How to use this calculator

Enter the number of cups in the first field. Use decimals for fractions: 0.25 for a quarter cup, 0.333 for a third cup, 0.5 for a half cup, 0.75 for three quarters. Select your ingredient from the dropdown. Select your cup standard (US, metric, or UK). Press Calculate to see the gram equivalent, ounces, kilograms, and tablespoon count.

Why cups and grams give different amounts per ingredient

A cup measures volume. A gram measures mass. Volume and mass are connected by density: the mass of a substance per unit of volume. Because different ingredients have different densities, the same cup volume gives a very different gram weight.

Consider two common baking ingredients:

• All-purpose flour: 1 cup = 125 g. Flour is light and airy with many tiny gaps between particles.
• Honey: 1 cup = 340 g. Honey is a dense liquid with no air gaps.

A cup of honey weighs 2.72 times as much as a cup of flour. If you substituted cup measurements between these two, your recipe would be completely wrong.

Ingredient density reference table

Ingredient	Grams per US cup
Rolled oats	90 g
Cocoa powder	85 g
Almond flour	96 g
Cake flour	114 g
Powdered sugar	120 g
Whole wheat flour	120 g
All-purpose flour	125 g
Bread flour	130 g
Cornstarch	128 g
Breadcrumbs (dry)	108 g
Brown sugar (packed)	220 g
White sugar (granulated)	200 g
Butter	227 g
Milk (whole)	244 g
Heavy cream	238 g
Water	240 g
Vegetable oil	218 g
Olive oil	216 g
Yogurt (plain)	245 g
Peanut butter	258 g
Rice (raw, white)	185 g
Maple syrup	322 g
Honey	340 g

These values assume standard measurement technique: spoon ingredient into the cup, level off the top. Scooping directly from the bag compacts the ingredient and can add 15-30% extra weight per cup.

US cup vs metric cup vs UK cup

Not all cups are the same size. Three different standards are in common use around the world.

US customary cup: 236.588 mL. Used in all American recipes. This is the standard for the conversion values in the density table above.

Metric cup (Australia, Canada, South Africa): 250 mL. About 5.7% larger than the US cup. Australian, Canadian, and South African recipes use this size. The same recipe using metric cups will produce a slightly larger quantity.

UK imperial cup: 284.131 mL. Equal to half an imperial pint. This is not commonly used in modern UK recipes, which typically follow the US or metric standard, but older British cookbooks may use it.

Always check the origin of a recipe before choosing your cup standard.

How measuring technique affects weight

The density values used in this calculator assume the standard technique: spoon the ingredient loosely into the measuring cup, then level off the top with a straight edge. This method gives the most consistent results.

Scooping directly from the bag: Compacts the ingredient against the sides and bottom of the cup. All-purpose flour scooped this way can reach 150-160 g per cup instead of 125 g. This is a 25% error that changes the texture of baked goods significantly.

Sifted flour: Sifting aerates flour, reducing its density further. Sifted all-purpose flour can weigh as little as 100-110 g per cup.

Packed brown sugar: Recipes specifically calling for “packed” brown sugar expect you to press it firmly into the cup. The calculator uses the packed value (220 g/cup) for brown sugar.

This variability is why professional bakers always weigh ingredients. A scale gives the same result every time regardless of technique.

Fractional cup quick reference

Fraction	Decimal	All-Purpose Flour	White Sugar	Butter
1/8 cup	0.125	15.6 g	25 g	28.4 g
1/4 cup	0.25	31.3 g	50 g	56.8 g
1/3 cup	0.333	41.7 g	66.7 g	75.7 g
1/2 cup	0.5	62.5 g	100 g	113.5 g
2/3 cup	0.667	83.4 g	133 g	151.5 g
3/4 cup	0.75	93.8 g	150 g	170.3 g
1 cup	1.0	125 g	200 g	227 g

Converting between cup standards in recipes

When you find a recipe from another country, you may need to adjust for a different cup standard. The adjustment factor is the ratio of cup sizes.

For most everyday cooking this difference is minor. For precision baking, especially delicate pastries and bread, the 5-20% difference between cup standards can noticeably affect the outcome.

Why professional bakers weigh instead of measuring cups

The baking industry uses grams (or ounces) rather than cups for two main reasons: precision and speed.

Precision: A gram scale is accurate to 1 g, sometimes 0.1 g. A cup measure introduces errors from packing variation, measurement technique, and cup size differences. For bread baking, a 5% variation in flour weight changes the hydration ratio and noticeably affects the final crumb texture.

Speed: Weighing is faster than filling and levelling multiple measuring cups. Professional recipes list all ingredients by weight so the baker can tare the bowl, add each ingredient, and confirm the exact total without washing any cups.

Baker’s percentages: Professional recipes use weights expressed as percentages of total flour weight. This makes scaling recipes up or down trivial. 100 g flour, 65 g water = 65% hydration. Double the batch: 200 g flour, 130 g water. This is impossible to do cleanly with cup measures.

Investing in a kitchen scale that reads in 1 g increments transforms baking precision and is the most useful single upgrade for anyone who bakes regularly.

Common cups-to-grams conversions for baking

Bread and pizza dough (1 batch): 3 cups all-purpose flour = 375 g 1 cup warm water = 240 g 1.5 tsp salt = 8.6 g 1 tsp active dry yeast = 2.6 g

Standard sponge cake: 1.5 cups cake flour = 171 g 1 cup white sugar = 200 g 0.5 cup butter = 113.5 g 0.25 cup milk = 61 g

Chocolate chip cookies: 2.25 cups all-purpose flour = 281 g 1 cup butter = 227 g 0.75 cup white sugar = 150 g 0.75 cup brown sugar = 165 g

Using gram weights from the start eliminates the need to convert mid-recipe and ensures consistent results every time you make the same recipe.

Cups to grams for liquid ingredients

Liquid ingredients are measured by volume (cups or mL), but weight (grams) is often more precise for viscous liquids that cling to measuring cups.

Liquid	1 US cup	1/2 cup	1/4 cup
Water	240 g	120 g	60 g
Whole milk	244 g	122 g	61 g
Heavy cream	238 g	119 g	59.5 g
Vegetable oil	218 g	109 g	54.5 g
Olive oil	216 g	108 g	54 g
Honey	340 g	170 g	85 g
Maple syrup	322 g	161 g	80.5 g
Buttermilk	245 g	122.5 g	61.25 g

Honey and maple syrup are the most important to weigh rather than measure by cup. A cup of honey stuck to the measuring cup sides means you are adding less than the recipe requires, and the difference of 20-30 g can noticeably affect the final sweetness and texture of the dish.

Chocolate and cocoa in baking

Chocolate and cocoa powder are common baking ingredients where gram measurement gives far more consistent results than cup measurement.

Cocoa powder: Very light at 85 g per US cup. Sifted cocoa powder can be as light as 60 g per cup. Packed cocoa can reach 100+ g per cup. The recipe writer’s intent is nearly impossible to replicate with a cup measure.

Chopped chocolate: Not a consistent density at all. Chocolate chips, roughly chopped chunks, and finely chopped chocolate fill a cup to very different weights. 1 cup of chocolate chips (standard baking size) is approximately 170-175 g. Roughly chopped dark chocolate might be 140-160 g per cup. Always weigh chocolate.

Shredded coconut (desiccated): 80-93 g per cup depending on how firmly packed. The calculator uses an unsweetened desiccated coconut value.

For any chocolate-heavy recipe (brownies, chocolate cake, truffles), weighing both the chocolate and cocoa powder is strongly recommended for consistent results across batches.

Cups to grams for gluten-free baking

Gluten-free baking uses a wider variety of flours, each with different densities. Measuring by weight is especially important in gluten-free recipes because small flour ratio changes affect structure significantly (gluten-free batters rely on alternative binding agents like xanthan gum and eggs rather than gluten).

Gluten-free flour	Grams per cup
Almond flour	96 g
Coconut flour	112 g
Rice flour (white)	158 g
Tapioca flour/starch	120 g
Oat flour	92 g
Buckwheat flour	120 g
Chickpea flour	92 g
Cassava flour	120 g
Potato starch	192 g

Notice that rice flour (158 g/cup) is significantly denser than almond flour (96 g/cup). A gluten-free blend recipe calling for a combination of these flours must be measured by weight to get the correct ratio.

Setting up a kitchen scale for cups-to-grams conversion

A digital kitchen scale accurate to 1 g is the tool that makes grams-to-cups conversion unnecessary in your own recipes. Once you cook by weight, you stop needing converters for your own recipes.

Setting up:

1. Place your mixing bowl on the scale and press tare (zero)
2. Add the first ingredient until the scale reads the target gram weight
3. Press tare again (zero out the bowl + first ingredient)
4. Add the next ingredient directly

Recommended specifications:

• Accuracy: 1 g or better (0.1 g for small amounts like spices and yeast)
• Capacity: at least 3 kg for large baking batches
• Tare function: resets to zero with the bowl or container on it
• Multiple units: grams, ounces, and mL for water

Scales accurate to 1 g are available for under $15 at most kitchen retailers. The investment is among the cheapest improvements you can make to cooking consistency.