How many cups is 200g of coconut milk (tinned)?

200g of coconut milk (tinned) (canned coconut milk) is

¾ cup + 2 tbsp

That's 0.88 US cups, 0.84 metric cups, or 13 level tablespoons.

Worked out from 1 US cup = 226g. 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 coconut milk (tinned)

100g: ⅓ cup + 2 tbsp
250g: 1 cup + 2 tbsp
1 cup: 226g
Half a cup: 113g
A quarter cup: 57g
1 tablespoon: 15g
Full table for coconut milk (tinned)

Where these numbers come from

USDA FoodData Central, SR Legacy, food 12118: “Nuts, coconut milk, canned (liquid expressed from grated meat and water)”. USDA lists these household measures for it:

1 cup = 226g
1 tbsp = 15g

Fractions of a cup are the cup weight scaled down. 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.