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½ US Cup Cornstarch = 64g

½ US Cup of cornstarch weighs 64 grams (2.26 ounces or 0.14 pounds; 118.3 mL or 8 tablespoons in volume) when measured spooned & leveled at a verified bulk density of 128g per 236.6 mL US Customary cup.

Imperial weight: 2.26 oz (0.14 lb) • Volume: 118.3 mL (8 tbsp)

Batch
Measuring density
Converted Measure
0.5 US cup Cornstarch (spooned & leveled) =
64 g
Physical scoop breakdown0.50 cups
1/2 cup
Edit either side to reverseCornstarch chart →
Grams
64 g
Ounces
2.26 oz
US Cups
½ cup
Metric (250mL)
0.47 c
Tablespoons
8 tbsp
Milliliters
118.3 mL

Kitchen note: Test-kitchen baseline uses spooned & leveled (128g/cup). Switching to dip scooped (145g/cup) changes each cup by 17g—use the packing toggle on the scale bench to match your recipe.

Batch Scaling Around ½ US Cup Cornstarch

Batch scaling conversion table around ½ US Cup of Cornstarch (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×) 32g (1.13 oz) ¼ cup 59.1 mL
Standard (1×) 64g (2.26 oz) ½ cup 118.3 mL
1.5× Batch 96g (3.39 oz) ¾ cup 177.4 mL
Double Batch (2×) 128g (4.52 oz) 1 cup 236.6 mL
Triple Batch (3×) 192g (6.77 oz) 1 ½ cups 354.9 mL

Measuring ½ US Cup of Cornstarch in the Kitchen

Measured spooned & leveled at a verified bulk density of 128g per US cup, ½ US cup of cornstarch weighs 64 grams (2.26 ounces). Measured using the dip scooped method (145g/cup), that same ½ cup holds 72.5g — a 8.5g difference in your mixing bowl.

Cornstarch packs easily into a solid cake when pressed; scoop gently with a spoon and sweep level with a straightedge.

Source note: USDA FDC #169698 & Argo technical specifications

Frequently Asked Questions

How many grams is ½ cup of cornstarch? ▾

½ US Cup of cornstarch measured spooned & leveled weighs 64 grams (2.26 ounces).

Why must cornstarch be dissolved in cold liquid first? ▾

Adding dry cornstarch directly to hot liquid gelatinizes the surface instantly, causing stubborn lumps.

Is cornstarch in the UK called cornflour? ▾

Yes, British recipes calling for cornflour mean pure white refined cornstarch (128g/cup), not yellow cornmeal.