Understanding Shrimp Size by the Numbers
When you buy shrimp, you'll see a range of numbers printed on the package, such as '16/20' or '51/60'. These numbers represent the 'count per pound,' meaning how many individual shrimp it takes to make one pound. The smaller the number, the bigger the shrimp. This is the most accurate way to gauge the size and approximate weight of a single shrimp.
How to Calculate Individual Shrimp Weight
To determine the approximate weight of one shrimp in ounces, simply take the average of the count range and divide 16 ounces by that number. For a bag labeled 21/25, the average count is 23. You would divide 16 by 23, which equals roughly 0.7 ounces per shrimp.
Comparison Table: Shrimp Size and Weight
This table illustrates the relationship between the standard shrimp count and the approximate weight of a single, uncooked shrimp.
| Shrimp Size Category | Count per Pound (Approx.) | Approximate Weight per Shrimp (Ounces) |
|---|---|---|
| Super Colossal / U-10 | Under 10 | Over 1.6 oz |
| Colossal / 13-15 | 13-15 | 1.07 – 1.23 oz |
| Extra Jumbo / 16-20 | 16-20 | 0.8 – 1.0 oz |
| Jumbo / 21-25 | 21-25 | 0.64 – 0.76 oz |
| Extra Large / 26-30 | 26-30 | 0.53 – 0.61 oz |
| Large / 31-40 | 31-40 | 0.40 – 0.51 oz |
| Medium / 41-50 | 41-50 | 0.32 – 0.39 oz |
| Small / 51-60 | 51-60 | 0.27 – 0.31 oz |
Factors Influencing a Single Shrimp's Weight
Several factors can influence the final weight of a shrimp, so the numbers above should be used as a guideline. When purchasing, consider these variables:
- Head-on vs. Headless: Shrimp with heads on will weigh more, and removing the head can reduce the count per pound by approximately two size grades.
- Shell-on vs. Peeled: Similarly, leaving the shell and tail on adds weight. Peeling the shrimp will increase the count per pound by about one size grade.
- Raw vs. Cooked: Shrimp lose water weight during cooking. As a result, cooked shrimp will weigh about 25% less than their raw counterparts. This is an important consideration for recipes that specify cooked shrimp weight.
- Preservatives: Some processors add preservatives to frozen shrimp that cause them to retain more water. These shrimp will shrink more during cooking than those without preservatives.
Common Uses for Different Shrimp Sizes
Selecting the right size of shrimp for a dish is crucial for achieving the desired texture and cooking results.
- Colossal & Jumbo Shrimp (U-10 to 25 count): Best used as a standalone appetizer like shrimp cocktail or grilled skewers. Their size and firm texture make them the centerpiece of a dish.
- Large & Extra Large Shrimp (26 to 40 count): The versatile 'workhorse' size, perfect for sautéing in butter, adding to pasta dishes like shrimp scampi, or using in stir-fries.
- Medium & Small Shrimp (41 to 60+ count): These cook quickly and are ideal for integrating into larger recipes. Think shrimp salads, soups, or dishes where the shrimp are part of a mix.
Calculating Servings by Count and Weight
For consistent and satisfying portions, it helps to understand how shrimp count translates to serving size. The FDA recommends a 3-ounce serving of cooked seafood per person. Depending on the shrimp size, this translates to:
- Colossal (U-15): 3-5 shrimp per serving.
- Jumbo (21-25): 5-7 shrimp per serving.
- Medium (41-50): 10-12 shrimp per serving.
Conclusion
The question of how many ounces is 1 shrimp has no single answer, as the weight is entirely dependent on the shrimp's size grade, indicated by the count per pound. By understanding the count system and how factors like cooking and processing affect the final weight, home cooks and chefs can ensure consistent results. Whether you need a handful of colossal shrimp for a striking appetizer or a larger number of medium shrimp for a pasta dish, mastering shrimp sizing is key to seafood success. For further reading and context on seafood sizing, sources like the Fulton Fish Market provide valuable insights.
