A typical 1 cup serving of chocolate soy milk contains 5.5 grams of protein (2.26 g per 100 g), which makes it a moderate source of protein. That covers roughly 11% of the 50 g reference Daily Value, so it adds toward your protein total for the day.
Around 14% of the calories in chocolate soy milk come from protein, so it is more of an energy food than a protein food. It contributes to a day's protein total, but the bulk of what it delivers is energy rather than amino acids - treat it as a contributor alongside a denser source, not as the protein in a meal.
Among the 31 soy foods in the database, chocolate soy milk ranks 23rd by protein per serving, and 464th out of all 796 foods on the site. Set against meatless deli slices, another soy food entry in the database, a serving carries about 0.5 g more protein (meatless deli slices has 5 g per 1 slice).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving above is measured by volume at 243 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #174293 - "Soymilk, chocolate, unfortified" (SR Legacy, published 4/1/2019). Values are the published reference figures for that record, not lab measurements for a specific brand or batch.
Quick answers
Chocolate soy milk protein FAQ
How much protein is in chocolate soy milk per 100 g?
Chocolate soy milk has 2.26 g of protein per 100 g. A typical 1 cup serving (243 g) provides 5.5 g.
Is chocolate soy milk a complete protein?
Yes. Chocolate soy milk is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
How much of the Daily Value does a serving of chocolate soy milk cover?
A 1 cup serving of chocolate soy milk contains 5.5 g of protein, about 11% of the 50 g reference Daily Value.
Is chocolate soy milk a good source of protein?
Chocolate soy milk is a moderate source of protein, and about 14% of its calories come from protein, which makes it more of an energy food than a protein food. Set against meatless deli slices, another soy food entry in the database, a serving carries about 0.5 g more protein (meatless deli slices has 5 g per 1 slice).