Seafood Portion Calculator
How much fish, shellfish or oysters to buy per person, using real, sourced portion ranges, not a guess.
Enter the number of adults on the left to see how much to buy.
Frequently Asked Questions
Where do these portion sizes come from?
Real, published portion guides from UK fishmongers and seafood suppliers, not a guess, see the note under the calculator for the exact sources and how any gaps between them were handled honestly.
Why is there a range instead of one exact number?
Real appetites vary. The range shown is the genuine sourced range, the headline figure is just where in that range your chosen appetite level points to, never a number outside it.
How are children's portions worked out?
Counted as roughly half an adult portion, a common, low-stakes catering rule of thumb, not a precise claim, since a real child's appetite varies far more by individual than any single figure could honestly capture.