How this calculator works
Event space is planned from a floor allowance per guest that depends on the seating: rows need the least room, formal dinner tables with chairs and service space need the most. The calculator multiplies the guest count by that allowance, then adds standard areas for each bar, buffet table and waiter station, plus a stage and a dance floor when you ask for them. The dance floor uses a per-guest allowance because only a share of guests dance at once. The total is the floor area, and the side of a square tent is its square root. Real tents come in fixed rectangular sizes, so round the total up to the next standard footprint.
Formula
Guest area = guests x square metres per guest, where the allowance is 0.7 for theater rows, 1.1 for conference seating, 1.4 for formal dinner, 1.0 for casual seating and 0.75 for cocktail standing. Extras = 10 per bar + 12 per buffet table + 4 per waiter station + 25 for a stage + 0.3 per guest for a dance floor. Floor area = guest area + extras. Square side = square root of floor area.
Worked example
A formal dinner for 150 guests needs 150 x 1.4 = 210 square metres for seating. One bar adds 10, two buffet tables add 24, a waiter station adds 4, a stage adds 25 and a dance floor adds 45, for 108 square metres of extras. The total is 318 square metres, so a square tent would need sides of about 17.8 metres.
Advertisement
Frequently asked questions
Why does formal dinner seating need so much more room?
Round tables of eight to ten people each need space for chairs, room between tables for servers and guests to move, and access to buffets and bars. Rows of chairs can be packed much more tightly, so the same guest count needs roughly half the floor area.
Is the dance floor area enough for everyone?
No, and it is not meant to be. A dance floor is sized for the share of guests dancing at any one time, not the whole party. The allowance of 0.3 square metres per guest is a common planning rule, and it assumes about half the guests will dance in rotation.
Should I include space for catering and toilets?
Catering tents, generators and washrooms are usually separate structures. This calculator sizes the guest tent only. If any of them must sit under the same roof, add their area to the total before choosing a tent.
Do fire and accessibility rules change the answer?
Yes. Local fire codes set maximum occupancy and require exits and accessible routes, and some events need wider aisles than the planning allowances used here. Treat the result as a starting point and check the requirements for your venue.