A typical 3 oz cooked serving of scallops contains 17.4 grams of protein (20.5 g per 100 g), which makes it a very good source of protein. That covers roughly 35% of the 50 g reference Daily Value, so it can anchor a high-protein meal for the day.
About 74% of the calories in scallops come from protein, which makes it extremely protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Among the 121 seafood in the database, scallops ranks 79th by protein per serving, and 198th out of all 796 foods on the site. Set against pacific herring, another seafood entry in the database, a serving carries about 0.5 g less protein (pacific herring has 17.9 g per 3 oz cooked).
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 weight at 85 g. The per-100 g figure lets you compare it directly against any other food here, whatever its serving.
Source: USDA FoodData Central #167742 - "Mollusks, scallop, (bay and sea), cooked, steamed" (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
Scallops protein FAQ
How much protein is in scallops per 100 g?
Scallops has 20.5 g of protein per 100 g. A typical 3 oz cooked serving (85 g) provides 17.4 g.
Is scallops a complete protein?
Yes. Scallops 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 scallops cover?
A 3 oz cooked serving of scallops contains 17.4 g of protein, about 35% of the 50 g reference Daily Value.
Is scallops a good source of protein?
Scallops is a very good source of protein, and about 74% of its calories come from protein, which makes it extremely protein-dense. Set against pacific herring, another seafood entry in the database, a serving carries about 0.5 g less protein (pacific herring has 17.9 g per 3 oz cooked).