How many grams is half a cup of dried pasta?

Half a cup of dried pasta (dry pasta) weighs

48g

That's 1.7oz. In a 250ml metric cup it's 50g.

This uses the US cup, the size American recipes mean. Half a cup is 118ml by volume.

Pasta shapes pack differently, so a cup of each weighs a different amount. The headline figure is penne.

Other amounts of dried pasta

Where these numbers come from

USDA FoodData Central, SR Legacy, food 20120: “Pasta, dry, enriched”. USDA lists these household measures for it:

1 cup spaghetti = 91g
2 oz = 57g
1 cup elbows = 122g
1 cup penne = 95g
1 cup farfalle = 81g
1 cup rotini = 96g
1 cup shells = 64g
1 cup lasagna = 90g

Fractions of a cup are the cup weight scaled down. The tablespoon figure is the cup weight divided by 16, since USDA doesn't list a tablespoon for this ingredient. The teaspoon is a third of the tablespoon. Metric-cup figures assume a 250ml cup, and Australian tablespoons hold 20ml. Weights under 10g are rounded to 0.1g, everything else to the nearest gram. Full source list.