125
g
0.125
kg
4.41
oz
7.81
g tbsp
125
g
0.125
kg
4.41
oz
7.81
g tbsp
The Cup to Gram Converter translates volumetric cup measurements into precise weight measurements in grams and ounces. This conversion is essential for accurate baking, following recipes from different countries, and achieving consistent, reproducible results every time you cook.
The fundamental problem with cup measurements is that different ingredients have vastly different densities. One cup of all-purpose flour weighs approximately 125 grams, while one cup of granulated sugar weighs 200 grams, and one cup of water weighs 240 grams. A recipe that says '1 cup flour' can easily become anywhere from 110 to 160 grams depending on how the flour is scooped — loosely spooned into the cup, packed lightly, or packed firmly. Professional bakers and pastry chefs universally use weight measurements rather than volume for this reason.
Weighing ingredients with a kitchen scale eliminates the variability of cup measurements entirely. This is especially important in baking, where the ratio of flour to liquid determines whether a cake is moist or dry, dense or light. Even a 10–15% variation in flour weight can significantly affect the outcome. This calculator provides accurate weight equivalents for the most common baking and cooking ingredients so you can follow any recipe with precision.
The conversion uses ingredient-specific density values expressed as grams per cup.
Grams calculation: $$m_{grams} = V_{cups} \times \rho_{ingredient}$$ where $$V_{cups}$$ is the volume in cups and $$\rho_{ingredient}$$ is the density of the specific ingredient in grams per cup.
Ounces calculation: $$m_{oz} = \frac{m_{grams}}{28.3495}$$ since 1 ounce = 28.3495 grams. Note: these are weight ounces (avoirdupois), not fluid ounces (volume).
Density reference values used:
These values reflect the King Arthur Baking and USDA standards for properly measured ingredients.
For best results in baking, use a digital kitchen scale accurate to 1 gram. The most common conversion to memorize: 1 cup of all-purpose flour ≈ 125g and 1 cup of sugar ≈ 200g. If your recipe uses British or Australian cups (250ml vs. the US 240ml standard cup), you may need to adjust by multiplying by 250/240 = 1.042. Metric recipes from Europe are typically weight-based and don't require conversion. For dairy and liquids, the difference between cup measurements and weight is small enough that volumetric measuring cups are usually adequate.
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2 cups of properly measured all-purpose flour = 250g. Over-packing can add 30-60g — a major cause of dense, dry baked goods.
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¾ cup butter = approximately 170g = 1.5 sticks. Butter is conveniently marked in tablespoons on US wrapper packaging.
Cup measurements depend heavily on how the cup is filled. Flour can vary by 20–30% (110–160g per cup) depending on whether it's sifted, spooned, or scooped. Sugar can vary less but still has significant variability when packed versus loosely filled. Weight is an absolute measurement — 250g is always 250g regardless of how tightly or loosely the ingredient was placed in the container. Professional bakers use weight exclusively for recipe consistency.
A US legal cup = 240 ml. An Australian and Canadian cup = 250 ml. A UK Imperial cup (historical) = 284 ml. Most modern UK and European recipes use metric weight (grams) rather than cups, avoiding this confusion. When following Australian recipes using cups, multiply the cup value by 1.042 (250/240) to get the US cup equivalent, or use the weight conversion which is unambiguous.
The spoon-and-level method: aerate the flour in its container by stirring, spoon it into the measuring cup without packing, then sweep the excess off the top with a straight edge. This method produces approximately 120–130g per cup of all-purpose flour. Never scoop the cup directly into the flour bag — this compresses it and can add 20–30% more flour than the recipe intends. For best results, just use a scale.
No — they are different units. Fluid ounces (fl oz) measure volume: 1 cup = 8 fl oz. Weight ounces (oz) measure mass. For water, they happen to be nearly equal (1 fl oz water ≈ 1.04 oz by weight), but for other ingredients they differ significantly. 1 cup of flour (8 fl oz volume) weighs only about 4.4 oz by weight. Always clarify which type of ounce a recipe means — weight ounces in baking recipes, fluid ounces for liquid measurements.
Go through each ingredient in the recipe, identify its type, and apply the appropriate grams-per-cup density. Keep a reference chart on your phone or printed in your kitchen. Many baking websites (King Arthur Baking, Serious Eats) provide comprehensive ingredient weight tables. Once converted, note the gram amounts next to each ingredient in the recipe for future use — you'll have a much more reliable recipe that produces consistent results every time.
Yes, high altitude (above 3,500 feet / 1,067 m) affects baking significantly. Lower atmospheric pressure causes leavening gases to expand faster, often causing cakes to rise and then collapse. Altitude doesn't change weight measurements but affects volume-based leavening and liquid ratios. At high altitude: reduce baking powder by 20–25%, reduce sugar slightly, increase liquid by 2–4 tablespoons per cup, and increase oven temperature by 15–25°F. Weight-based recipes still need altitude adjustments for leavening but are more reliable than volume-based recipes.
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