How much food per person is actually 'enough'?
Every host asks this question and most rely on rough instinct, which is exactly why buffets so often run out of the popular dish or drown in leftovers of another. Catering professionals instead use per-category baseline weights — grams of rice, grams of meat, millilitres of soup — multiplied by an event-type factor that reflects how much people tend to eat in that setting.
This tool follows the same logic on a smaller scale: pick a food category to get an industry-typical baseline, then the event type adjusts that baseline up or down. A quiet tea gathering needs far less food per head than a celebration where guests are expected to eat generously across several dishes.
Why event type changes the numbers so much
At a light snack event, people nibble across a short window and rarely eat a full meal's worth of any one item. A sit-down family meal is closer to a standard full plate. A buffet with many dishes on offer paradoxically needs slightly more total food per guest, because guests take smaller amounts of many things rather than a large amount of one, and inevitably over-serve themselves on favourites.
Celebrations and festivals push portions higher still, both because people eat more in a celebratory mood and because social norms often expect visible abundance rather than food running out.
Using this for multiple dishes at once
If your event has more than one dish per category — say, two curries — run the calculator once per dish and split the category's total portion between them rather than doubling it, otherwise you will over-cater significantly. A good rule of thumb is roughly 60/40 or 50/50 split in the main-dish category when two similar dishes are served side by side.
Frequently Asked Questions
Does this account for kids attending the event?
The baseline assumes adult portions. For events with a significant number of children, count each child as roughly half a guest when entering the guest count.
What if I'm serving several main dishes instead of one?
Calculate the main-dish category total once, then divide it across your dishes rather than running the full calculation separately for each — see the guidance above.
Is this suitable for professional catering quotes?
It's a solid starting estimate for planning purposes, but professional caterers typically also adjust for guest demographics, season and specific menu items, so treat this as a planning baseline rather than a final order.
Why does buffet food need more per person than a sit-down meal?
Guests at a buffet tend to sample multiple items and often take slightly more than they will actually eat, so caterers build in extra to avoid running short on popular dishes.