How many crisps per person at a party?

Allow about 30g per person per hour for casual grazing — roughly one standard single-serve portion (a Walkers grab bag is ~45g, a multipack bag ~25g, and 30g is the long-standing single-serve crisp portion). For a 3-hour party, that is 90g per person, which lines up with UK caterers planning 4-6 nibble pieces per person per hour for snack-only grazing. If crisps are the only snack, increase to 40-50g per hour; if there is other food on offer, 20-30g per hour is plenty.

How many snack bowls do I need?

Place 1 bowl per 8-10 guests. For 30 guests, put out 3-4 bowls in different locations. Spread them around the room so guests do not cluster in one spot. Refill regularly rather than putting huge amounts out at once.

What snacks should I put out?

A good mix: salted crisps, tortilla chips with dips, mixed nuts, pretzels, and breadsticks. For something different: wasabi peas, rice crackers, popcorn, or vegetable crisps. Offer at least 2-3 types for variety.

Should I buy sharing bags or multipack?

Sharing bags (150-200g) are the best value for filling bowls. Multipacks of individual bags (25g) are convenient but more expensive per gram. For 20+ guests, buy large sharing bags. Keep some spare bags unopened as backup.

PartyCalcs

Snack Bowl Calculator — Crisps & Nibbles

Calculate crisps, nuts, and snack quantities for bowls at your party.

Number of Guests

How many people will be grazing on snacks

Party Duration

How long guests will be snacking — longer parties need more

Snack Bowls

Number of bowls to spread out (about 1 per 8-10 guests)

Bag Size

Weight of one bag you'll buy — sharing bags are 150-200g, single-serve ~25-45g

Cost per Bag

Price of one bag in pounds, for the total cost estimate

How We Calculate This

This calculator estimates snack quantities based on guests, duration, and grazing rates. The default grazing rate of 30g per person per hour reflects a standard UK single-serve crisp portion (~25-45g) and the 4-6 nibble pieces per person per hour that caterers plan for snack-only grazing.

Formula

Total snacks = guests × hours × grams per person per hour (default 30g)
Bags needed = total grams ÷ grams per bag (rounded up)
Per bowl = total grams ÷ number of bowls (the snacks each bowl gets)
Min bowl capacity = per-bowl grams ÷ fill level (so the snacks sit at, e.g., 75% full — pick bowls at least this big)

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Adjust quantities based on your guests and event type.