How many cups is 250g of chopped hazelnuts?

250g of chopped hazelnuts is

2 cups + 3 tbsp

That's 2.17 US cups, 2.06 metric cups, or 35 level tablespoons.

Worked out from 1 US cup = 115g. 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 chopped hazelnuts

Where these numbers come from

USDA FoodData Central, SR Legacy, food 12120: “Nuts, hazelnuts or filberts”. USDA lists these household measures for it:

1 cup, chopped = 115g
1 cup, ground = 75g
1 cup, whole = 135g
1 oz (21 whole kernels) = 28.35g
10 nuts = 14g

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.