Volume to Weight Flour Conversion

110–115 g per cup

Sifted flour, then measured — Lightest possible measurement; some pastry recipes specify this explicitly

120–125 g per cup

Spooned and levelled (recommended home method) — Spoon flour into cup, sweep level with a straight edge; standard for King Arthur and most US test kitchens

130–135 g per cup

Fluffed, then scooped and levelled — Stir the bag first, then scoop; middle ground most home cooks actually do

140–150 g per cup

Dip-and-sweep (most common home method) — Scoop cup directly into flour bag and sweep level; adds ~20% mass vs spooned

155–165 g per cup

Packed cup — Tamped down; almost no recipe intends this, but anxious bakers do it unconsciously

145–155 g per cup

Bread flour (dip-and-sweep) — Slightly denser than AP due to lower starch-to-protein ratio

100–110 g per cup

Cake flour (spooned) — Finer particle, lower density; always sift before measuring or weigh

To measure by weight, place the bowl on a digital scale, tare to zero, and spoon flour directly in until the scale reads the target gram weight. To convert a volumetric recipe: identify which filling method the recipe developer intended (check the recipe headnote or the cookbook's measurement note), then use the corresponding gram weight per cup. When in doubt, assume spooned-and-levelled at 120 g per cup — this is the assumption of most American test kitchens and is the lightest defensible interpretation.

• The spooned-and-levelled method is the de facto standard for US recipe developers at major publications (NYT Cooking, Bon Appétit, King Arthur); if a recipe has no note, assume this method and 120–125 g per cup.
• If a recipe feels dry and heavy on first attempt, your cup was likely overfilled by 20–30 g — retest by weight.
• High-altitude baking (above 900 m / 3,000 ft) may require reducing flour by 1–2 tablespoons per cup because lower air pressure allows gases to expand more; this makes exact flour weight even more critical.
• Store flour in an airtight container — flour absorbs ambient humidity, increasing its bulk density over weeks; a cup of damp flour can weigh 10–15 g more than a cup of freshly-opened flour.
• Cake flour is often sold pre-sifted; even so, always fluff it before measuring by volume or simply weigh it — the difference between 100 g and 115 g cake flour will noticeably affect the crumb of a delicate layer cake.

• Whole-wheat flour

  Denser than AP due to bran particles; 1 cup ≈ 120–130 g spooned, 140–150 g dip-and-sweep

• Almond flour

  Very light and clumpy; 1 cup ≈ 96 g; always weigh for macaron and gluten-free baking

• Rye flour

  Medium density; 1 cup ≈ 102–120 g depending on grind; fine rye is lighter than medium or dark

• Gluten-free flour blends

  Wide variation by brand and blend; always check the brand's stated cup weight; typically 130–160 g per cup

• Volume to Weight Conversion (Metric and Imperial)

  The broader conversion framework covering all dry and liquid ingredients

• Hydration Percentage in Bread Baking

  Baker's percentage eliminates cup measurements for flour entirely

• Basic Cake Ratio

  1:1:1:1 butter/sugar/egg/flour by weight; only works correctly when flour is weighed

1. 1.BakeWise — Shirley O. Corriher (Scribner, 2008)
2. 2.King Arthur Baking — Ingredient Weight Chart (King Arthur Baking Company, current edition)
3. 3.The Joy of Cooking, 75th Anniversary Edition — Irma S. Rombauer, Marion Rombauer Becker, Ethan Becker (Scribner, 2006)
4. 4.Ratio: The Simple Codes Behind the Craft of Everyday Cooking — Michael Ruhlman (Scribner, 2009)

Confidence: high