Estimate the edible yield from whole fish and shellfish before buying.
Usage Tip
Ask the fishmonger to fillet whole fish and keep the bones for stock.
What Is Seafood Yield?
Seafood yield is the share of the weight you buy that ends up as edible meat on the plate. Whole fish loses its head, bones, and skin; shrimp lose their shells; crab and lobster are mostly shell. Yield is what stands between buying ten pounds and actually feeding everyone.
raw to buy = edible needed ÷ yield %
The calculator above works both directions: enter what you have to see how many it feeds, or enter a guest count to see how much to buy.
Seafood Yield Percentage Chart
| Seafood | Edible yield |
|---|---|
| Whole fish | 40–55% |
| Fish fillet | 90–100% |
| Shrimp (shell-on) | 45–55% |
| Crab legs | 40–50% |
| Whole crab | 25–30% |
| Lobster | 20–30% |
| Scallops | 90–100% |
| Raw amount | Edible meat |
|---|---|
| 10 lb whole fish | 4–5 lb |
| 10 lb shrimp (shell-on) | ~5 lb |
| 10 lb crab legs | 4–5 lb |
Whole Fish vs Fillet Yield
A whole fish yields only 40–55% edible meat after the head, frame, skin, and fins are removed – round-bodied fish sit at the low end, while long lean fish do better. A fillet is already 90–100% edible, so you pay more per pound but waste almost nothing. Buying whole is cheaper per pound only if you can use the frames for stock.
Shrimp Yield
Shell-on shrimp yield about 45–55% peeled meat; the shells and heads are the rest. Already-peeled shrimp are close to 100% but cost more per pound. Save the shells for stock to claw back some value.
Crab Yield
Crab is mostly shell. Crab legs yield 40–50% meat; a whole crab yields only about 25–30%. Plan generously – crab looks like a lot of food until it is picked.
Lobster Yield
Whole lobster yields just 20–30% meat – a 1.25–1.5 lb lobster gives roughly 4–6 oz of picked meat, about one main-course portion. This is why lobster feels expensive: you are buying three to four pounds of shell for every pound of meat.
Cooking Shrinkage & Shell Weight
Two things shrink your yield. Shell and bone are removed before or after cooking and are pure loss. Cooking shrinkage – moisture lost to heat – trims another 10–25% from the cooked weight, more for lean fish cooked hard. The yield figures here are for edible raw meat; expect the cooked portion to be a little smaller.
Trimming Loss
Even fillets lose a little to trimming – skin, pin bones, bloodline, and ragged edges. Allow about 5–15% trimming loss for skin-on fillets you will clean yourself. The calculator has an optional trimming-loss field for this.
Serving Guide
| Seafood | Per person |
|---|---|
| Fish fillet | 6–8 oz |
| Shrimp | 6–8 oz |
| Crab legs | 1–1.5 lb |
| Lobster | 1 whole (1.25–1.5 lb) |
| Scallops | 5–6 oz |
Serve more for a main course, less for an appetizer or a multi-dish spread.
Seafood Purchasing Guide & Tips
- Buy by edible yield, not sticker weight – a cheaper whole fish can cost more per edible pound than fillets.
- For lean budgets, fillets and peeled shrimp waste the least.
- Ask the fishmonger to clean or fillet for you to skip the trimming loss at home.
- Buy whole only if you will use the frames and shells for stock.
- Round up – running short at a seafood dinner is expensive to fix mid-meal.
Catering & Buffet Planning
For events, plan per edible portion and add a 10–15% buffer. At a buffet with several proteins, people take less of each – figure 3–4 oz of seafood per guest rather than a full 6–8 oz main portion. Example: a shrimp boil for 20 guests at 6 oz edible each needs 7.5 lb of peeled meat, which is about 15 lb of shell-on shrimp at 50% yield. The guest mode above does this math for you.
Frequently Asked Questions
What does seafood yield mean?
It is the percentage of the purchased weight that becomes edible meat after removing shell, bone, skin, and head.
How much seafood per person should I buy?
For a main course, 6–8 oz of edible meat per person. Convert to purchase weight by dividing by the yield – for shell-on shrimp at 50%, that is about 12–16 oz to buy per person.
How much meat is in a whole lobster?
About 20–30% of its weight – roughly 4–6 oz of picked meat from a 1.25–1.5 lb lobster.
Is it cheaper to buy whole fish or fillets?
Whole fish is cheaper per pound but yields only 40–55% meat, so compare price per edible pound. Fillets win unless you use the frames.
How much shrimp do I need for a crowd?
Figure 6–8 oz edible per guest. At ~50% yield, that is roughly 12–16 oz of shell-on shrimp each – the guest mode above totals it for you.
Do these yields include cooking loss?
They are for edible raw meat. Cooking removes another 10–25% in moisture, so the cooked portion is a bit smaller.
Related Seafood Calculators
Food service note: yields are estimates and vary by species, size, season, how the fish was cut, and how carefully it is cleaned and trimmed. Cooking removes additional weight. Use these figures for planning and purchasing, add a buffer for events, and confirm with your supplier – this is general guidance, not a food-cost guarantee.