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⅓ US Cup All-Purpose Flour = 40g

⅓ US Cup of all-purpose flour weighs 40 grams (1.41 ounces or 0.09 pounds; 78.9 mL or 5.33 tablespoons in volume) when measured spooned & leveled at a verified bulk density of 120g per 236.6 mL US Customary cup.

Imperial weight: 1.41 oz (0.09 lb) • Volume: 78.9 mL (5.33 tbsp)

Batch
Measuring density
Converted Measure
0.33 US cup All-Purpose Flour (spooned & leveled) =
40 g
Physical scoop breakdown0.33 cups
1/3 cup
Edit either side to reverseAP Flour chart →
Grams
40 g
Ounces
1.41 oz
US Cups
⅓ cup
Metric (250mL)
0.32 c
Tablespoons
5.33 tbsp
Milliliters
78.9 mL

Kitchen note: Test-kitchen baseline uses spooned & leveled (120g/cup). Switching to dip-and-sweep scooped (142g/cup) changes each cup by 22g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around ⅓ US Cup All-Purpose Flour

Batch scaling conversion table around ⅓ US Cup of All-Purpose Flour (0.5× to 3× recipe batches in grams, ounces, US cups, and milliliters)
Batch Scale Weight (g / oz) US Cups & Spoons Metric (mL)
Half Batch (0.5×) 20g (0.71 oz) 2 tbsp + 2 tsp 39.4 mL
Standard (1×) 40g (1.41 oz) ⅓ cup 78.9 mL
1.5× Batch 60g (2.12 oz) ½ cup 118.3 mL
Double Batch (2×) 80g (2.82 oz) ⅔ cup 157.7 mL
Triple Batch (3×) 120g (4.23 oz) 1 cup 236.6 mL

Measuring ⅓ US Cup of All-Purpose Flour in the Kitchen

Measured spooned & leveled at a verified bulk density of 120g per US cup, ⅓ US cup of all-purpose flour weighs 40 grams (1.41 ounces). Measured using the dip-and-sweep scooped method (142g/cup), that same ⅓ cup holds 47.3g — a 7.3g difference in your mixing bowl.

Fluff flour with a fork, spoon gently into the measuring cup until mounded, and sweep level with a straight knife. Never pack or tap the cup, which compresses flour up to 142g.

Source note: King Arthur standard (120g/cup spooned) & USDA FDC #169761

Frequently Asked Questions

How many grams is ⅓ cup of all-purpose flour? ▾

⅓ US Cup of all-purpose flour measured spooned & leveled weighs 40 grams (1.41 ounces).

Why does 1 cup of all-purpose flour vary from 120g to 145g? ▾

Dipping the cup straight into the bag compacts the tiny particles, packing up to 25% more flour than gently spooning and leveling.

Can I swap all-purpose flour for bread flour by weight? ▾

Yes, substitute 100g of bread flour for 100g of AP flour, but note bread flour absorbs slightly more water due to higher protein.