Ingredient Weight ↔ Volume Converter
A cup of flour weighs 120g. A cup of sugar weighs 200g. Stop guessing — convert exactly.
Why Weight Matters in Baking
A cup of flour can weigh anywhere from 100g to 160g depending on how you scoop it. That 60% variance is the difference between a fluffy cake and a hockey puck. Professional bakers always use weight (grams) for this reason.
This calculator contains accurate grams-per-cup values for 30 common baking ingredients, sourced from King Arthur Flour and USDA data.
The Most Important Conversions
The conversions that matter most: 1 cup all-purpose flour = 120g (spooned and leveled — 140g if scooped directly). 1 cup granulated sugar = 200g. 1 cup butter = 227g = 2 sticks. 1 cup brown sugar (packed) = 220g.
Tips for Accurate Measuring
If you don't have a kitchen scale: spoon flour into the measuring cup and level with a knife (don't scoop — it compacts). Pack brown sugar firmly. Level dry ingredients with a straight edge. For liquids, use a liquid measuring cup and read at eye level.
King Arthur Flour found that a single cup of flour can vary by up to 30% depending on the measuring technique. Their standard is 120g per cup (spooned and leveled). Using a $12 kitchen scale eliminates this variable entirely.
