Cups to Ounces Converter
Use this when a recipe is measured in oz instead of grams, and check whether the ounce means volume or weight.
Last updated: July 2026
Cups to Grams Converter
Exact conversions by ingredient, not a one-size-fits-all cup weight.
"1 cup" means something different depending on what's in it. A recipe asking for "1 cup flour" and one asking for "1 cup butter" aren't asking for the same weight — they're asking for the same volume of two very different ingredients. This converter accounts for that difference, so the number you get is the number that actually works in your kitchen.
Live calculator
Convert cups and grams
237
grams
Measure water in a liquid measuring cup on a flat counter, reading the line at eye level for the cleanest result.
Density makes the conversion
Why 1 Cup of Flour and 1 Cup of Sugar Are Different in Grams
Grams measure weight. Cups measure volume. These are fundamentally different kinds of measurement, and the only reason we can convert between them at all is because every ingredient has a density — a specific relationship between how much space it takes up and how much it weighs. Water happens to have a simple, memorable density: 1 cup of water weighs almost exactly 236 grams, which is part of why many recipes casually treat "cup" and "gram" as interchangeable. But swap that water for flour, and the same cup now holds something far lighter — air gets trapped between the flour particles, so a cup of flour weighs roughly half of what a cup of honey does, even though both fill the identical 236 ml space.
That density bridge is the practical core of every honest cups to grams converter. A cup is fixed at a standard US volume of about 236.6 milliliters, but the ingredient filling that cup determines the gram result. Granulated sugar settles into tight crystals, so a cup weighs about 200 grams. Butter is a compact fat, so a cup weighs about 227 grams. Honey is viscous and dense, so the same volume can weigh around 340 grams. Flour is the outlier that causes the most kitchen trouble because it is full of air pockets and changes dramatically when scooped, sifted, shaken, or packed.
The gap between "spooned" and "packed" flour isn't trivial — it can be a 10-15% difference in weight, which is enough to noticeably dry out a cake or make bread dough too stiff. The standard method used by most published recipes is to spoon flour into the measuring cup until it's overflowing, then level it off with a knife — never scoop directly from the bag, which compresses the flour and packs in more than the recipe intended. Brown sugar is the opposite case: most recipes assume it's packed firmly into the cup, because that's how the sugar is typically sold and stored. When a recipe doesn't specify, the safest assumption is: spoon light, dry ingredients like flour and cocoa powder; pack moist ingredients like brown sugar.
Use cup measurements when the recipe is forgiving, when you are making soups, sauces, smoothies, pancakes, or casual weeknight food where a tablespoon more or less can be adjusted by taste. Use grams when the recipe depends on structure: cakes, cookies, laminated dough, enriched bread, macarons, custards, candy, or any formula where flour, sugar, fat, and liquid need to stay in balance. If you only have cups, choose the ingredient-specific conversion and copy the measuring technique as closely as possible. If you have a scale, weigh the ingredient once and skip the uncertainty completely.
Density at a glance
Water237gLiquid baseline for many kitchen shortcuts.
All-purpose flour125gSpooned and leveled; packed flour is heavier.
Granulated sugar200gFine crystals settle more densely than flour.
Butter227gCompact solid fat with stable wrapper markings.
Honey340gViscous liquid, much denser than water.
| Ingredient | Density Type | 1 Cup (grams) | 3/4 Cup (grams) | 1/2 Cup (grams) | 1/4 Cup (grams) |
|---|---|---|---|---|---|
| Water | Liquid, baseline | 237g | 178g | 118g | 59g |
| All-purpose Flour (spooned) | Light, airy | 125g | 94g | 63g | 31g |
| All-purpose Flour (packed) | Compressed | 140g | 105g | 70g | 35g |
| Granulated Sugar | Dense, fine crystals | 200g | 150g | 100g | 50g |
| Brown Sugar (packed) | Dense, moist | 220g | 165g | 110g | 55g |
| Butter | Solid fat | 227g | 170g | 113g | 57g |
| Rice (uncooked) | Grain, variable | 185g | 139g | 93g | 46g |
| Honey | Viscous liquid | 340g | 255g | 170g | 85g |
| Vegetable Oil | Liquid, lower density | 218g | 164g | 109g | 55g |
Fraction lookup
Common Cup Fractions Converted to Grams
Don't want to type numbers into the calculator above? Here's every common fraction of a cup, pre-converted for the ingredients you're most likely measuring.
| Cup amount | Water | All-purpose Flour | Granulated Sugar | Butter |
|---|---|---|---|---|
| 1/8 cup | 30g | 16g | 25g | 28g |
| 1/4 cup | 59g | 31g | 50g | 57g |
| 1/3 cup | 79g | 42g | 67g | 76g |
| 1/2 cup | 119g | 63g | 100g | 114g |
| 2/3 cup | 158g | 83g | 133g | 151g |
| 3/4 cup | 178g | 94g | 150g | 170g |
| 1 cup | 237g | 125g | 200g | 227g |
| 1.5 cups | 356g | 188g | 300g | 341g |
| 2 cups | 474g | 250g | 400g | 454g |
| 3 cups | 711g | 375g | 600g | 681g |
Unit clarity
Grams vs GM vs Milliliters: Don't Mix Them Up
You might see "grams" abbreviated as g, gm, gr, or even misspelled as "gramm" — in everyday recipe searches, they are usually trying to point to the same standard metric unit of weight. If someone types "convert gm to cups" or "cup g converter," they are almost always looking for a grams to cups or cups to grams calculation. The wording changes, but the conversion problem is still the same: you need the ingredient density before a cup volume can become a gram weight.
The easiest trap is confusing grams with milliliters. For plain water, 1 gram and 1 milliliter are nearly identical, which is a helpful shortcut for liquids and for remembering that 1 cup of water is about 237 grams or 237 ml. That shortcut breaks down quickly for anything denser or lighter than water. Honey is much heavier than water, so 1 cup weighs about 340 grams even though it still fills roughly 237 ml of volume. Vegetable oil is lighter than water, so 1 cup weighs about 218 grams while still filling the same measuring cup.
Ounces add another layer. A fluid ounce measures volume, while a regular ounce measures weight. That means a cups to ounces conversion can mean two different things depending on the recipe. If you are looking for fluid volume, use the Cups to Ounces Converter. If you are adapting a baking recipe and need weight, grams are usually the clearer and more repeatable unit.
Kitchen workflow
How to Use This Converter While Cooking
Start by reading the recipe's wording before typing a number. If it says "1 cup all-purpose flour, spooned and leveled," choose all-purpose flour and use the calculator result directly. If it says "1 packed cup brown sugar," choose brown sugar and press it firmly into the cup before leveling. If the recipe only says "1 cup flour," assume spooned and leveled unless the author clearly uses a scoop-and-pack method elsewhere. Those small wording clues are often more important than adding another decimal place to the conversion.
Next, keep the direction of the conversion honest. When a US recipe gives cups and you want scale weights, use cups to grams. When a metric recipe gives grams and you only have measuring cups, switch to grams to cups and treat the answer as a practical estimate. Reverse conversions are useful for getting dinner made, but they cannot restore the precision of a scale because cups still depend on how the ingredient lands in the measuring cup.
For best results, measure dry ingredients over a sheet of parchment or a bowl so overflow can be returned cleanly. Level powders with the back of a knife, read liquids at eye level, and scrape sticky ingredients like honey fully into the mixing bowl. If you are converting a full recipe, write the gram values beside each line once and reuse that corrected version the next time. That turns a one-time conversion into a repeatable kitchen standard.
When scaling a recipe, convert first and round last. For example, if you are doubling a cake, convert the original cup amounts into grams, multiply the gram values, then round to the nearest practical kitchen gram. Rounding each ingredient too early can stack small errors across flour, sugar, butter, and liquid. This matters most in baking formulas with several measured ingredients, where a few grams per line can become a noticeable texture change and reduce repeatability between batches.
FAQ
Cups to Grams Converter Questions
How many grams are in 1 cup?
It depends entirely on what you're measuring. One cup of water weighs about 237 grams, but 1 cup of flour weighs only about 125 grams, and 1 cup of honey weighs around 340 grams. Because a cup measures volume and a gram measures weight, the conversion always depends on the ingredient's density — there's no single universal answer.
How many grams are in 3/4 cup?
For water, 3/4 cup equals about 178 grams. For flour, spooned and leveled, it's closer to 94 grams. For granulated sugar, it's about 150 grams, and for butter it is about 170 grams. Use the calculator above and select your specific ingredient when the recipe involves anything denser, lighter, packed, or sticky.
How do I convert grams to cups without a scale?
Without a scale, you're estimating rather than measuring precisely, which works fine for forgiving recipes like soups but is risky for baking. Use tablespoon and teaspoon equivalents as a rough guide, with 16 tablespoons equal to about 1 cup, but for best results with flour, sugar, or butter, a kitchen scale remains the most accurate method — even an inexpensive one.
Is 1 cup of flour the same as 1 cup of sugar in grams?
No. One cup of all-purpose flour weighs about 125 grams, while 1 cup of granulated sugar weighs about 200 grams — a 60% difference for the exact same volume. This is because sugar crystals pack more densely than flour particles, which trap air between them and shift depending on whether the flour is spooned, sifted, or packed.
What does "gm to cups" mean — is it different from grams to cups?
"Gm" is simply a common informal abbreviation for grams, most often used in typed searches or non-US recipe sites. It refers to the exact same unit, so there is no functional difference between "gm to cups" and "grams to cups" conversions. The important part is still choosing the ingredient before converting the weight back into cup volume.
Why do baking recipes use cups instead of grams?
Cups became the standard in US home baking largely due to kitchen tradition and the widespread availability of graduated measuring cups. Many professional bakers and most of the rest of the world prefer grams, because weight is unaffected by how tightly an ingredient is packed, making it inherently more precise, repeatable, and easier to scale.
How many grams is 2 cups of flour?
Two cups of all-purpose flour, spooned and leveled, weighs approximately 250 grams. If the flour is packed rather than spooned, that figure can rise to around 280 grams, which is why consistent measuring technique matters as much as the conversion itself. For cakes and cookies, spoon the flour lightly into the cup before leveling.
Does grams to cups conversion change for liquids vs solids?
Yes, indirectly. Liquids like water, milk, or oil have a relatively predictable density, making their gram-to-cup conversion fairly consistent. Solids and semi-solids — flour, sugar, shredded cheese, nut butter, or packed brown sugar — can vary based on how they're packed into the cup, which is why we specify spooned or packed for dry ingredient conversions.
What is 100 grams in cups?
100 grams of water is just under 1/2 cup, about 0.42 cup. 100 grams of flour is a bit under 3/4 cup, about 0.8 cup, since flour is lighter than water by volume. 100 grams of granulated sugar is about 1/2 cup. Select your ingredient in the calculator above to get the precise figure for your recipe.
Can I use the same conversion for cups to grams calculator results across all recipes?
Generally yes, as long as you're using standard US cup measurements, 236.6 ml, and consistent measuring technique as specified in the recipe. If a recipe originates from the UK or Australia, double-check whether it's using an imperial or metric cup, which can shift the conversion by up to 20%. For delicate baking, prefer the gram value.
Methodology
Data Sources and Review Method
All gram values on this page are calculated using ingredient density data cross-referenced with the USDA FoodData Central database and King Arthur Baking's published ingredient weight charts — the same reference many professional recipe developers use to standardize their measurements. Where measuring technique affects the result, such as spooned vs. packed flour, we clearly label both figures rather than presenting a single "average" number that might not match your recipe's assumption. This page is reviewed quarterly to ensure conversion values remain accurate; the last verification date is shown at the top of this page.
The calculator uses the US customary cup standard of 236.588 milliliters. Values are rounded to kitchen-friendly whole grams in lookup tables, while the live calculator keeps enough precision to support reverse conversions from grams back to cups. Ingredient pages remain the source of deeper notes for flour, sugar, butter, oil, honey, rice, and other high-variation pantry staples.