Chair quantity calculator
Work out how many chairs to hire or set out for an event, from your guest count and a spare allowance for staff, last-minute guests or breakages.
Result
Chairs needed
How to use this calculator
- Enter the number of guests.
- Set a spare percentage for extra chairs.
- Read the total chairs needed.
Assumptions
- Assumes every guest needs exactly one seat — a mixed standing/seated event needs a separate estimate for the seated portion only.
Technical details: what the fields mean
- Number of guests
guests - Total number of seated guests expected.
- Spare chairs
extraPercent - Extra chairs to cover staff, last-minute additions or a damaged/unusable chair.
Methodology
Chairs needed = guests × (1 + spare%), rounded up.
Worked example
80 guests, 10% spare
Inputs: guests=80, extraPercent=10
Result: 88 chairs
Practical guidance
- A 10% spare allowance is a common default for a seated event — increase it for a more formal event where every seat must be perfect.
Common mistakes
- Ordering exactly the guest count with no spares, leaving no margin for last-minute additions or a damaged chair.
FAQs
How many chairs do I need for 80 guests?
With a 10% spare allowance, 88 chairs.