Free Online Calculators
Convert US recipes: cups, sticks & oz to grams โ per ingredient
This calculator converts US recipe measurements like cups, sticks (butter) and ounces into grams, so you can follow American recipes accurately. Since weight per cup varies by ingredient (flour, sugar, butter, etc.), just select the ingredient and get the correct conversion factor instantly.
It depends entirely on the ingredient, because a cup measures volume while grams measure weight. Flour, sugar, butter and liquids all have different densities, so each one gives a different gram figure for the same cup.
No, only for ingredients whose density happens to match that weight โ a cup is a unit of volume, not a fixed weight. Light, airy ingredients weigh far less per cup than dense ones like butter or honey.
No, that is not a general rule. Only some light ingredients, such as flaked coconut or certain cereals, come close to that weight per cup, while most staples are heavier.
No, not as a general conversion. The weight of four cups depends on which ingredient you measure, so you have to convert per ingredient rather than using a fixed ratio.
No โ a cup of an ordinary baking ingredient weighs much less than that. Only very dense ingredients approach such a weight per cup, so always convert by ingredient.
Pick the ingredient first, then multiply the number of cups by that ingredient's weight per cup. Since flour, sugar, cocoa and butter all pack differently, using one universal factor will throw off your recipe.
Yes, divide the weight in grams by the ingredient's gram-per-cup value. The conversion works in both directions as long as you use the density of the specific ingredient.
It depends on the flour type and how you fill the cup โ spooned and levelled flour weighs noticeably less than scooped, packed flour. For consistent baking results, weigh the flour on a scale instead of measuring by volume.
Baking powder is a fine, dense powder, so a full cup weighs considerably more than the same volume of flour. Recipes almost always call for teaspoons rather than cups, so convert from the small spoon measures instead.
A cups to grams converter turns US recipe measurements into precise metric weights so your baking and cooking come out right every time. It sounds like a simple unit conversion, but there's a catch that trips up most online tools: a cup measures volume, while a gram measures weight. These are fundamentally different physical properties, and the relationship between them depends entirely on the density of the ingredient you're measuring. One cup of rolled oats weighs just 90 grams because oats are light and full of air pockets, while one cup of honey weighs a hefty 340 grams because honey is dense and syrupy โ that's a difference of nearly four times for the exact same "1 cup" measurement. This is precisely why a generic volume-to-weight converter fails at cooking conversions, and why this calculator relies on a dedicated ingredient density table instead of a single multiplier.
The underlying math is straightforward once you know the ingredient's density in grams per cup. The formula is:
grams = (amount_in_ml / cup_size_ml) ร grams_per_cup
And to reverse the calculation:
cups = grams / grams_per_cup
The tricky part isn't the arithmetic โ it's knowing which "cup" you're using. The reference US customary cup is 236.588 ml, but there's also the US legal cup (240 ml, used on US nutrition labels), the metric cup (250 ml, standard in Australia, New Zealand, and Canada), and the historic UK cup (284 ml). This matters more than most people realize: an Australian recipe calling for "1 cup of flour" means 127 grams, while an American "1 cup of flour" means 120 grams. That seven-gram gap explains many of the contradictory numbers you'll find scattered across the internet when people don't specify which cup standard they're using.
Flour is the single biggest source of baking failures, and it's not because of the recipe โ it's because flour has no fixed density. How you get flour into the cup dramatically changes its weight:
That's up to a 25% difference in flour weight from the same "1 cup" measurement, and it is the single most common reason American recipes turn out dry, dense, or tough. If you scoop your measuring cup directly into the flour bag instead of spooning flour in lightly and leveling it off, you could be adding a quarter more flour than the recipe author intended.
US butter is sold in sticks, and this creates its own conversion shorthand: one stick of butter equals 113.4 grams, which equals half a cup, which equals 8 tablespoons. Recipes that call for "1 stick" or "2 sticks" are really just using a different unit for the same measurement.
Also watch out for a classic mix-up: an ounce (a unit of weight, equal to 28.35 g) and a fluid ounce (a unit of volume, equal to 29.57 ml) are not the same thing, even though the numbers look similar. They only roughly coincide when measuring water, because water happens to have a density close to 1 gram per milliliter. For anything denser or lighter than water โ which is basically every other ingredient โ using ounces and fluid ounces interchangeably will throw your recipe off.
Example 1 โ Converting a US cookie recipe: A recipe calls for 2 1/4 cups of all-purpose flour. Using 120 g per cup (spooned and leveled), that's 2.25 ร 120 = 270 grams. Weighing this out on a kitchen scale removes the guesswork of scooping versus spooning and guarantees consistent results every time you bake.
Example 2 โ An Australian recipe converted for a US baker: An Australian cake recipe lists "1 1/2 cups caster sugar" using the 250 ml metric cup. Since granulated sugar is close to 200 g per US cup, but the metric cup is larger, the actual weight comes out closer to 211 g per cup, so 1.5 cups equals roughly 317 grams total โ noticeably more than if you'd used a US cup measure for the same instruction.
Example 3 โ Butter and honey together: A recipe needs 1 stick of butter (113.4 g) and 1/3 cup of honey. Since honey weighs 340 g per cup, one-third of that is about 113 g. Converting both to grams and weighing them on the same scale is faster and more accurate than switching between a butter wrapper's markings and a sticky measuring cup.
| Ingredient | Grams per US Cup |
|---|---|
| All-purpose flour | 120 |
| Bread flour | 127 |
| Cake flour | 114 |
| Whole wheat flour | 113 |
| Cornstarch | 128 |
| Granulated sugar | 200 |
| Powdered sugar | 120 |
| Brown sugar packed | 213 |
| Honey | 340 |
| Maple syrup | 322 |
| Butter | 227 |
| Oil | 218 |
| Water | 237 |
| Milk | 240 |
| Rolled oats | 90 |
| Rice uncooked | 185 |
| Cocoa powder | 85 |
| Chocolate chips | 170 |
| Breadcrumbs | 108 |
| Table salt | 273 |
It comes down to density and particle structure. Flour is a fine powder with lots of tiny air pockets trapped between the particles, so a cup of it is mostly air by volume. Sugar granules pack together more tightly with less air space, so the same cup holds more actual mass โ roughly 200 g of sugar versus 120 g of flour.
Match the cup standard to where the recipe originated. American recipes almost always mean the US customary cup (236.588 ml), Australian, New Zealand, and Canadian recipes typically use the 250 ml metric cup, and older British recipes may use the 284 ml historic UK cup. When in doubt, converting to grams and weighing your ingredients removes this ambiguity entirely.
Yes, significantly. A cup measurement can vary by up to 25% depending on how you scoop, pack, or level an ingredient like flour, while a kitchen scale gives you the exact same weight every single time. Professional bakers weigh ingredients almost universally for this reason, and switching to grams is one of the easiest ways to make your home baking more consistent.