Baking Conversion Calculator
Convert cups of a common baking ingredient to grams.
Input sheet
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Cup measurements drift — a scooped cup of flour can weigh anywhere from 120 to 150 grams depending on how packed it is. Converting to grams with a known density removes that guesswork, which is why serious bakers weigh everything.
How it works
Cups times the ingredient's grams-per-cup density. Weighing is more accurate than scooping.
Each ingredient has a typical grams-per-cup density: all-purpose flour around 125 g, granulated sugar 200 g, packed brown sugar 220 g, butter 227 g, powdered sugar 120 g, and water or milk 240 g. Multiply your cup quantity by that density to get the weight to put on the scale.
Flour is the ingredient where volume goes most wrong. The same cup can hold roughly 20% more flour if you scoop straight from the bag versus spooning it in level. Weighing eliminates that swing and is the single biggest accuracy upgrade for baking.
Grams = cups × ingredient density (grams per cup)
Worked examples
Converting 2 cups of all-purpose flour to grams. → 250 grams (about 8.8 oz, 32 tablespoons)
2 cups × 125 g/cup = 250 g.
Weighing 1.5 cups of granulated sugar. → 300 grams
1.5 cups × 200 g/cup = 300 g.
Tips & gotchas
- A cheap digital kitchen scale (roughly $10–20) pays for itself in consistency — set it to grams and tare the bowl between additions.
- Densities are ingredient-specific. Do not reuse the flour factor for sugar or butter; powdered sugar (120 g/cup) and granulated (200 g/cup) are far apart.
- Packed brown sugar means firmly pressed into the cup; that is why it weighs more per cup than granulated. If a recipe says loosely packed, weigh slightly under.
- When a recipe lists both volume and weight, trust the weight — it is what the developer actually used.
FAQ
Why do flour conversions vary between sources?
Because a cup of flour has no fixed weight. Different cookbooks assume different scooping methods, so you will see anywhere from 120 to 142 grams per cup. This calculator uses 125 g, a common spoon-and-level standard. Match whatever your recipe specifies if it states a weight.
Is weighing really more accurate than measuring cups?
Yes, substantially. Volume depends on how compacted the ingredient is; weight does not. For flour and powdered sugar especially, weighing removes the largest source of error in home baking.
How do I convert grams back to cups?
Divide the gram weight by the ingredient's grams-per-cup density. For example, 250 g of flour ÷ 125 g/cup = 2 cups.
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