What Is 16/20 Shrimp Sizing? (Count & Weight Chart)

16/20 shrimp means a count grade of about 16 to 20 shrimp per pound, or roughly 454 g. Each piece therefore weighs about 0.8 to 1.0 oz (23 to 28 g) on the package’s stated count basis. The label does not guarantee edible yield: head-on, shell-on, and peeled shrimp provide different amounts of meat.

A bag label can look precise while leaving out the detail that matters most: what was counted. I check the net weight and whether shrimp are raw, cooked, peeled, shell-on, or head-on before estimating pieces or portions. Those details make 16/20 useful for comparison, but not a promise that every bag contains the same number of edible shrimp.

What 16/20 shrimp sizing means

16/20 is a count-size grade: it usually indicates 16 to 20 shrimp per pound, or about 454 g. The number describes how many pieces fit into that weight, not a fixed length or a guaranteed serving size. Always read the package details, because suppliers may use different count bases.

In plain terms, 16/20 shrimp are relatively large. A pound counted as 16 pieces averages about 1 oz (28 g) per piece. If it has 20 pieces, the average is about 0.8 oz (23 g). These are estimates calculated from the count range, not a claim that each shrimp in the bag weighs exactly the same.

The most important qualifier is the count basis. The package may count raw shrimp with shells on, peeled shrimp, or another form. A head-on shrimp includes more non-edible weight than a peeled shrimp, so two bags with the same grade and net weight may not produce the same amount of meat.

Check the label for:

• Net weight, such as 1 lb or 2 lb
• Count grade, such as 16/20
• Whether shrimp are raw or cooked
• Whether they are peeled, shell-on, or head-on
• Any wording that explains what form the count applies to

Key takeaway: Use 16/20 to compare approximate piece size. Use the package’s net weight and count basis to estimate the amount you can serve.

Shrimp count and weight chart

This chart shows common count grades as approximate numbers of shrimp per pound. “U” means “under” the listed number. Grades and label conventions can vary by supplier, so use the chart as a comparison guide and check the bag for its own count basis.

The chart’s direction is easy to miss: a lower count number generally means larger shrimp, because fewer pieces make up a pound. A higher count means more pieces fit into the same weight.

Count labels are ranges, not exact pack counts. A 1 lb pack marked 16/20 is expected to contain about 16 to 20 shrimp on the stated count basis. A 2 lb pack would be about 32 to 40. Actual package counts can depend on the product form and supplier’s grading practices.

Key takeaway: Compare grades within the same product form when you can. A peeled 16/20 pack and a head-on 16/20 pack may not offer the same edible yield.

Individual weight, pack count, and serving yield

A 16/20 shrimp averages about 0.8 to 1.0 oz (23 to 28 g) by simple division of one pound by 20 or 16. Pack count is an estimate based on net weight and the stated count basis; serving yield also depends on whether shells and heads are included.

Here is the calculation:

• 1 lb is about 16 oz, or 454 g.
• 16 oz divided by 20 shrimp is 0.8 oz each.
• 16 oz divided by 16 shrimp is 1 oz each.
• 454 g divided by 20 is about 23 g; divided by 16 is about 28 g.

The arithmetic estimates average piece weight across the range. Individual shrimp in one bag can vary, so do not use the result as a strict piece-by-piece specification.

For portion planning, first decide how much edible shrimp you want per person. For example, if you choose a 4 oz (113 g) portion of peeled shrimp, 1 lb of peeled shrimp makes four such portions by weight. At 16/20, that pound contains about 16 to 20 pieces, or roughly four to five pieces per portion. This is a planning example, not a universal serving standard.

For shell-on or head-on shrimp, do not treat the full package weight as edible meat. Shells and heads contribute to the scale weight but are not part of the peeled portion. If the label does not give a usable edible-yield figure, allow for that difference when buying and avoid promising an exact number of peeled pieces.

Key takeaway: For reliable portions, plan from net weight and edible form first; use the count range to estimate how many whole shrimp will be on the plate.

How to cook 16/20 shrimp safely

The 16/20 label does not set a cooking time. Starting temperature, pan crowding, and heat all affect how quickly shrimp cook. Thaw safely, dry them, cook in a single layer, and verify the thickest pieces reach 145°F (63°C) with a food thermometer.

1. Read and prep. Check whether the shrimp are raw or cooked, and whether they are peeled or shell-on. Thaw frozen shrimp in the refrigerator or in a sealed bag under cold running water. Drain them and pat dry before cooking. Do not thaw at room temperature.

2. Preheat and portion. Choose a pan that suits your burner and cooking method. Preheat over medium to medium-high heat, then add an appropriate cooking fat. If the shrimp would crowd the pan, cook in batches. Too many pieces at once release moisture and can steam rather than sear.

3. Cook and check. Arrange shrimp in one layer and turn them once as they become opaque. Check the thickest shrimp with a food thermometer and cook to 145°F (63°C). Shrimp should also look pearly and feel firm, but appearance alone is less reliable than checking temperature.

4. Remove promptly. Take the shrimp off the heat once they reach the safe endpoint. Do not cook them longer just because the package grade or piece count seems uncertain; extra cooking can make them tough.

5. Finish and clean. If desired, add a suitable liquid to the pan and loosen browned bits. Serve promptly. Let cookware cool before cleaning, and follow the maker’s care instructions.

Key takeaway: Size helps you plan the pan and portion, but temperature—not the 16/20 label—confirms the cooking endpoint.

Cookware choices for 16/20 shrimp

Shrimp sizing is separate from cookware performance. Stainless steel, cast iron, carbon steel, and nonstick can all cook shrimp; the best choice depends on the method and your stove. Match cookware to the burner, follow its oven and heat limits, and avoid long acidic cooking in reactive, uncoated aluminum or iron.

Stainless steel is a practical choice for searing and for making a quick pan sauce. Cast iron and carbon steel also work for searing, but they retain heat, so manage the burner and remove shrimp promptly at the safe endpoint. Nonstick can be convenient when you want easier release, but follow the maker’s heat limits and care instructions.

On an induction stove, use cookware marked as induction-compatible. The shrimp grade does not change that requirement. For a quick cook, pan size and avoiding crowding matter more than choosing a particular material.

If you add an acidic liquid, such as a wine or tomato-based ingredient, avoid prolonged cooking in reactive, uncoated aluminum or iron. A short deglaze is different from simmering an acidic sauce for a long time; for extended acidic cooking, choose cookware suited to that use.

After cooking, cool the pan before washing to reduce the risk of damage from abrupt temperature changes. Dry bare cast iron or carbon steel thoroughly and restore a thin film of oil after washing.

Key takeaway: Choose the pan for the cooking method, not the shrimp grade, and follow the cookware maker’s limits.

Worked examples for buying and serving

These examples show how to apply the count range without treating it as an exact edible-yield promise. Each estimate uses the package’s stated basis; shells, heads, and supplier grading can change the result in practice.

Example 1: A 1 lb peeled pack. A 16/20 label suggests about 16 to 20 shrimp. If you plan 4 oz of edible shrimp per person, the pound divides into four portions by weight. That works out to roughly four to five shrimp per portion.

Example 2: A 2 lb shell-on pack. The count estimate is about 32 to 40 pieces if the grade applies to the package as sold. But the whole 2 lb is not 2 lb of peeled meat. For a meal that needs a specific amount of edible shrimp, account for the shells and heads rather than relying only on the piece count.

Example 3: Comparing 16/20 with 26/30. For the same count basis and one-pound weight, the 16/20 pack has fewer, larger pieces; the 26/30 pack has more, smaller pieces. If you want whole shrimp that stand out on a plate, 16/20 may suit the presentation. If your dish calls for many smaller bites, a higher count grade may be easier to portion.

When describing a meal to guests, state both the grade and product form, such as “16/20 peeled shrimp” or “16/20 shell-on shrimp.” That is more informative than giving a piece count alone.

Key takeaway: The count grade helps set expectations for piece size; net weight and product form are the better basis for serving math.

Frequently asked questions

These answers clarify the most common points about 16/20 shrimp: what the numbers mean, how to estimate count and weight, and what the label cannot tell you. Use the package’s count basis whenever it is available, especially when shrimp are sold with shells or heads.

Is 16/20 shrimp large?
Yes. It is generally considered a large count grade because about 16 to 20 pieces make up a pound.

How many shrimp are in a pound of 16/20?
About 16 to 20 on the package’s stated count basis. The actual number may vary with the supplier and product form.

How much does one 16/20 shrimp weigh?
About 0.8 to 1.0 oz (23 to 28 g), estimated by dividing a pound by 20 or 16.

How many 16/20 shrimp are in a 2 lb bag?
A rough estimate is 32 to 40 pieces, if the count grade applies to the product as sold.

Does 16/20 mean 16 to 20 shrimp in every bag?
No. It is a count range tied to weight and a stated basis, not a guarantee of an exact number in each package.

Are 16/20 shrimp counted with the shell on?
Not always. Check the label. The count basis may depend on whether shrimp are shell-on, peeled, or head-on.

How many 16/20 shrimp should I serve per person?
There is no serving count set by the grade. Choose an edible-weight portion for your meal, then use the count range to estimate pieces. Shell-on shrimp yield less peeled meat than their package weight.

What temperature should shrimp reach?
Cook shrimp to 145°F (63°C). Check the thickest shrimp with a food thermometer; firmness and pearly opacity are helpful visual signs but do not replace the temperature check.

Does the shrimp size change how long it takes to cook?
Larger shrimp may need more time than smaller ones, but the 16/20 label does not provide a reliable cooking time. Pan heat, starting temperature, and crowding also matter.

Can I cook 16/20 shrimp in cast iron or stainless steel?
Yes. Both can work, as can carbon steel and nonstick. Choose a pan suited to your stove and cooking method, and follow the manufacturer’s heat and care instructions.

(This article was written by one of our staff writers, Julian R. Hayes. Visit our Meet the Team page.)