PartyCalcs.uk
Party Hat Calculator — Hats & Accessories
Calculate party hats, blowers, and accessories for each guest.
How We Calculate This
This calculator works out party hat and blower pack quantities including spares.
Formula
- Total hats = (children + adults) + spares
- Hat packs = total hats / hats per pack (rounded up)
- Blower packs = (total hats × accessory multiplier) / blowers per pack (rounded up)
- Grand total = hat cost + blower cost
Frequently Asked Questions
One per guest (adults and children) plus 10-15% spares. Hats break, get squashed, and some guests want a fresh one. For a party of 20, buy 23-24 hats. They usually come in packs of 6, 8, or 12.
For kids parties, having hats for adults is optional but fun. For birthday parties (any age), New Year, and themed events, include everyone. If budget is tight, prioritise children and buy a couple of extra for enthusiastic adults.
Party blowers (one per person), poppers (for countdowns/entrances), whistles (noisy but fun), leis or bead necklaces (for themed parties), and glow sticks (for evening parties). Buy these in multi-packs for value.
Standard party hat packs contain 6, 8, or 12. Party blowers come in packs of 8-12. Buying larger packs is better value per item. Theme-specific packs may have fewer items but match your party decorations.
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Last updated: February 2026
All calculations are estimates. Adjust quantities based on your guests and event type.