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150g Cornstarch = 1 cup + 2 tbsp + 2 ¼ tsp

150 grams of cornstarch equals 1 cup + 2 tbsp + 2 ¼ tsp (1.17 US Customary cups, 1.11 Metric 250 mL cups, 277.3 mL, 18.75 tablespoons, or 5.29 oz) when measured spooned & leveled at a verified density of 128g per US Customary cup.

Exact decimal volume: 1.17 US Customary Cups • 1.11 Metric Cups (250 mL) • 18.75 tbsp • 5.29 oz

Batch
Measuring density
Converted Measure
150 g Cornstarch (spooned & leveled) =
1 US Cup + 2 tbsp + 2 ¼ tsp
Physical scoop breakdown1.17 cups
1 cup
×2
2 tbsp
2 ¼ tsp
Edit either side to reverseCornstarch chart →
Grams
150 g
Ounces
5.29 oz
US Cups
1 cup + 2 tbsp + 2 ¼ tsp
Metric (250mL)
1.11 c
Tablespoons
18.75 tbsp
Milliliters
277.3 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 150g Cornstarch

Batch scaling conversion table around 150g 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×) 75g (2.65 oz) ½ cup + 1 tbsp + 1 ¼ tsp 138.6 mL
Standard (1×) 150g (5.29 oz) 1 cup + 2 tbsp + 2 ¼ tsp 277.3 mL
1.5× Batch 225g (7.94 oz) 1 ¾ cups 415.9 mL
Double Batch (2×) 300g (10.58 oz) 2 ⅓ cups 554.5 mL
Triple Batch (3×) 450g (15.87 oz) 3 ½ cups 831.8 mL

Measuring 150g of Cornstarch in the Kitchen

Because 1 US Customary Cup (236.6 mL) of cornstarch weighs 128g when measured spooned & leveled, 150 Grams (150g) translates to 1.17 US cups (1 cup + 2 tbsp + 2 ¼ tsp). By contrast, using the dip scooped measure (145g/cup — a 17g per-cup shift), 150g occupies 1 cup + 1 ¾ tsp (1.03 cups).

Without a kitchen scale, measure 1 cup + 2 tbsp + 2 ¼ tsp (18.75 tablespoons total) using spooned & leveled technique. 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 cups is 150 grams of cornstarch? ▾

150 grams of cornstarch (spooned & leveled, 128g per US cup) equals 1 cup + 2 tbsp + 2 ¼ tsp (1.17 US Customary Cups, 1.11 Metric 250 mL cups, or 18.75 tablespoons).

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.