How many cups is 100g of dried egg noodles?

100g of dried egg noodles (dry egg noodles) is

2½ cups + 2 tbsp

That's 2.63 US cups, 2.49 metric cups, or 42 level tablespoons.

Worked out from 1 US cup = 38g. Cups are rounded to the nearest kitchen fraction, with what's left over in level tablespoons. If you have scales, weighing is more accurate.

Other amounts of dried egg noodles

200g: 5¼ cups
250g: 6½ cups + 1 tbsp
1 cup: 38g
Half a cup: 19g
A quarter cup: 9.5g
1 tablespoon: 2.4g
Full table for dried egg noodles

Where these numbers come from

USDA FoodData Central, SR Legacy, food 20109: “Noodles, egg, dry, enriched”. USDA lists these household measures for it:

1 cup = 38g
2 oz = 57g

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.