Buffet Food Quantity Calculator
Tell us the number of guests and what kind of buffet it is for a quantity list.
Answer
120 sandwich quarters and 120 hot savoury items
Quantities to prepare
- Four quarters is one whole sandwich.
- Buffet food gets picked at rather than plated, so guests eat more of the first two or three things they reach.
- Add roughly 10% if the event runs longer than three hours, and put out the extra later rather than all at once.
- Cold food should not sit out for more than four hours. Keep the rest chilled and top the table up.
Source: Standard UK catering and home-cooking portion guidance · Reviewed 2026-09-10 · Guidance version 1.0.0
Reference and detail
Be honest about what kind of buffet it is
This is the decision that gets the numbers right. Drinks and nibbles after a christening is a very different quantity from a wedding buffet that is standing in for dinner. If the invitation implies a meal, guests will arrive expecting one.
Variety beats volume
Eight modest dishes look far more generous than four large ones, and people eat about the same. It is the first two or three things on the table that get eaten most, so put the cheapest items there and keep the expensive platters further along.
Long events need topping up
Add roughly 10% if it runs past three hours, but hold that back and refill the table rather than putting everything out at the start. Cold food should not be out for more than four hours, so the second half stays in the fridge until it is needed.
Dietary needs
Assume at least one guest in ten needs a vegetarian option and label anything containing nuts, gluten or shellfish. Keep those dishes at their own end of the table with their own serving spoons.
Questions and answers
Questions about buffet quantities
How much food do I need per person for a buffet?
Enter your guest numbers above for a full breakdown. Buffets need slightly less food per head than a plated meal because portion sizes are self-selected, but more variety, since people take a little of several dishes rather than one full plate.
Does a buffet replace a full meal?
It depends on the time of day and how substantial the dishes are. A lunchtime or evening buffet with hot dishes, bread and a dessert can stand in for a full meal; a mid-afternoon spread of nibbles usually cannot and guests will expect a proper meal either side of it.
Should I buy extra food for a buffet?
Yes, buy a little more than the calculated total. Buffets are harder to portion precisely than a plated meal, and a table that looks generous encourages people to relax rather than hold back.
How do children change buffet numbers?
Children typically eat around half an adult portion at a buffet and gravitate towards a narrow range of dishes, so it is worth including a few simple, plain items alongside anything more adventurous.
How do I keep buffet food safe while it is out on the table?
Keep cold dishes cold and do not leave food that needs to stay chilled sitting out at room temperature for long periods.
Food safety
Cool cooked food at room temperature and get it into the fridge within one to two hours. Eat leftovers within two days, or freeze them. Your fridge should be between 0 and 5°C.
Source: Food Standards Agency, How to chill, freeze and defrost food safely: chilling food (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0
What should I do with buffet leftovers?
Cool leftovers quickly and refrigerate them, then reheat until steaming hot throughout and only reheat once.
Food safety
Cool cooked food at room temperature and get it into the fridge within one to two hours. Eat leftovers within two days, or freeze them. Your fridge should be between 0 and 5°C.
Source: Food Standards Agency, How to chill, freeze and defrost food safely: chilling food (GOV.UK) · Reviewed 2026-09-11 · Guidance version 2.0.0