How Much Salmon Per Person? Fillets and Whole Sides

Buy 6 to 8 oz of skinless salmon fillet per adult when salmon is the main course, or 4 to 6 oz when it’s one of several dishes — so six people need roughly 3 lb, and twelve need about 6 lb. Children eat 3 to 4 oz. If you’re buying a whole side, a typical farmed side runs 2.5 to 3.5 lb and feeds five to seven adults as a main. If you’re buying a whole fish, head and bones and all, budget about a pound per person.

Those four numbers cover almost every salmon decision you’ll make. Here’s the detail underneath them.

The chart

Guests	Main course (7 oz each)	Part of a spread (5 oz each)
4	1.75 lb	1.25 lb
6	3 lb	2 lb
8	3.5 lb	2.5 lb
10	4.5 lb	3 lb
12	5.25 lb	3.75 lb
20	8.75 lb	6.25 lb
30	13 lb	9.5 lb

Those are skinless fillet weights before cooking. Three adjustments:

• Skin-on adds about 5%. Buying 4 lb skin-on gives you a shade under 4 lb of fish. Not enough to change the shopping list at six people; enough to notice at thirty.
• Salmon loses moisture as it cooks, so a 7 oz raw portion lands nearer 5.5 oz on the plate. That’s already built into the numbers above — don’t shrink them again.
• Children under about ten eat half an adult portion, and a room of teenagers eats more than a room of adults.

Buying by the side

A side of salmon is the whole fillet from one flank of the fish, and it’s the best-value way to buy for a group as long as you’re happy to cut it.

Side weight	Adults as a main	Adults as part of a spread
2 lb	4	6
2.5 lb	5	7
3 lb	6	9
3.5 lb	7	11
4 lb (large)	8	12

A whole side also solves the problem of the thin tail end. Cut portions across the side rather than along it and everyone gets a mix of thick and thin, instead of two people getting the dry bit.

Roast it whole for a crowd — one tray, one timing, no turning — and portion it at the table. For twelve people that’s a single 5 to 6 lb side, or two 3 lb sides on two trays, which fit an ordinary oven better.

Buying a whole fish

A whole salmon loses roughly half its weight to head, frame, skin and trim, so buy about twice the fillet weight you’d otherwise need. Ten people who would eat 4.5 lb of fillet need a fish somewhere around 9 to 10 lb.

That’s a lot of oven, and it’s the reason whole-fish cooking is a summer party thing rather than a Tuesday thing. If you go that way, ask the fishmonger to gut and scale it, and take the frame home for stock.

The four things that change the number

How long the party runs. A sit-down dinner served at once needs the numbers above. A grazing spread over three hours needs less salmon per head than you’d think, because people eat across the whole table.

What else is on the table. Salmon next to a big tray of potatoes, a grain salad and bread stretches a long way — this is the same arithmetic as our meat-per-person guide, and the sides do most of the work. Salmon with a green salad and nothing else does not.

Hot or cold. A cold poached side on a buffet gets picked at in small amounts; a hot fillet on a plate gets eaten entirely. Cold service, plan 20% less.

Leftovers, on purpose. Cooked salmon is genuinely useful the next day — flaked into pasta, into fried rice, into a jacket potato. If you want that, add a pound.

Worked examples

Dinner for 6, salmon as the main. 6 × 7 oz = 42 oz, so a 2.5 to 3 lb side. Roast it whole and cut it into six across the fillet.

A buffet for 25 with three other mains. Count salmon as one of four dishes and it isn’t a full portion each — 25 × 3 oz = 75 oz, so about 5 lb, or two small sides. Serve it cold and flaked.

A birthday lunch for 12, salmon plus potatoes and salad. 12 × 5 oz = 60 oz, so a 4 lb side or two 2 lb ones. Add a pound if you want leftovers.

Family of four with a hungry teenager. Two 6 oz fillets, one 8 oz and one 4 oz, and everybody’s honest about who is getting which. Our potluck dishes that travel round out the table when the fish itself is tight.

Cooking it so the portions land right

Buying the right weight doesn’t help if half of it dries out. Salmon is done when the flesh has just turned opaque and flakes under gentle pressure at the thickest point; an instant-read thermometer takes the argument out of it entirely on a big side, where the thick end and the tail end are never done at the same moment.

Cook a whole side on a lined tray in a hot oven and start checking early. Pull it at the thick end and let the residual heat finish it while it rests — the thin end will already be there.

Frequently asked questions

How much salmon do I need for 10 people? About 4.5 lb of fillet if salmon is the main course, or 3 lb if it’s one of several dishes. That’s one large side or two small ones.

How much is a serving of salmon? 6 to 8 oz raw per adult as a main course, which lands around 5 to 6 oz cooked. Restaurant portions are usually 6 oz.

How big is a side of salmon? Usually 2.5 to 3.5 lb for a farmed fish, which feeds five to seven adults as a main course. Larger sides run to 4 lb or more.

How much whole salmon per person? About 1 lb per person, because roughly half the weight of a whole fish is head, frame and skin.

Is it cheaper to buy a whole side? Usually, per pound, and it wastes less than individual fillets because you control the portion sizes. The trade-off is that you have to cut it and cook it in one piece — which is also why it’s the easiest option for a crowd, alongside the rest of our group meal planning.