Arrowroot Powder/Starch: US Cups & tbsp to Grams (g) & Ounces (oz) Conversion
Convert volumes of arrowroot powder (also known as arrowroot starch or arrowroot flour) measured in US cups and tablespoons (tbsp) to its approximate weight in metric grams (g) and imperial/US ounces (oz). Often used as a gluten-free thickener.
US Volume (Arrowroot Powder)
Grams (g) (approx.)
Ounces (oz) (approx. by weight)
1 teaspoon (tsp)
2.5-3 g
0.09-0.11 oz
1 tablespoon (tbsp)
7.5-9 g (often ~8g)
0.26-0.32 oz
2 tablespoons (1/8 cup)
15-18 g
0.53-0.63 oz
1/4 cup
30-35 g
1.06-1.23 oz
1/3 cup
40-47 g
1.41-1.66 oz
1/2 cup
60-70 g
2.12-2.47 oz
1 cup
120-140 g (often ~120g or 125g)
4.23-4.94 oz
Important Considerations for Arrowroot Powder:
Arrowroot powder is a very fine, light powder similar in density to cornstarch. A common average is around **120-125 grams per US cup** (approximately 4.2-4.4 ounces) when spooned and leveled.
Do not pack arrowroot powder into the measuring cup. Use the "spoon and level" method for volume measurements.
Arrowroot is a popular gluten-free thickener for sauces, gravies, and pie fillings, and it creates a clear, glossy finish. It thickens at a lower temperature than cornstarch.
For consistent thickening, measuring by weight with a kitchen scale is recommended.