The most common mistake when choosing a space

Gross floor area is the total floor area of the space—measured from wall to wall. Net floor area is what remains after subtracting all unusable elements.

What qualifies as a tax deduction?

• Stage or speaker's platform (4 to 60 m², depending on the size)
• Bar and catering setup (10 to 30 m²)
• DJ booth or technical room (4 to 20 m²)
• Closet or entryway (10 to 25 square meters)
• Mandatory escape routes and aisles (at least 1.2 m wide — required by law)
• Lighting and sound production space (0 to 40 m²)

Rule of thumb: net space is 60 to 75% of gross space. Does the brochure say “600 m²”? In practice, that means you’ll have 360 to 450 m² available for your guests. Keep this in mind when choosing a venue. For more information on how to compare venues on an equal basis, read our article on scouting venues for events →

The amount of space required per person depends entirely on how you arrange the room. These are the standard guidelines:

• Theater (seating rows, no tables): 0.7–0.9 m² per person
• Cabaret-style seating (small tables with chairs): 1.2–1.5 m² per person
• Boardroom (rectangular conference table): 2.0–2.5 m² per person
• Gala dinner / banquet (round tables): 1.5–2.0 m² per person
• Cocktail reception / standing: 0.5–0.8 m² per person
• Combined (program + dinner): 1.8–2.5 m² per person

Please note: an evening program that includes both a theatrical performance and a dinner requires two different setups. This means either a larger venue or a change of rigging during the event. Both options require time and logistical planning—be sure to plan this in advance.

Math doesn't have to be complicated. This step-by-step guide works for any type of event.

Step 1 — Determine the number of guests. Always use the maximum number, not the estimated number. 180 RSVPs can easily turn into 210 on the night of the event.

Step 2 — Choose your setup type. Is it a standing reception, a dinner, or an evening event with rows of seats?

Step 3 — Calculate the net space requirement. Example: 200 guests, gala dinner, 1.75 m² per person = 350 m² net.

Step 4 — Calculate the gross area requirement. Divide the net area requirement by 0.65: 350 ÷ 0.65 = 540 m² gross minimum.

Step 5 — Add up the production-related deductions. Need a large stage or an extensive catering setup? Add 50 to 100 square meters to your search criteria.

In this example, you’re looking for a venue with a minimum gross area of 600 m² for a gala dinner with 200 guests. Not 800 m², but not 400 m² either. Want to know exactly what other factors influence your planning? Read our complete event planning checklist →

Space calculations aren’t just about comfort. Fire departments and local authorities set requirements for the maximum occupancy of a space. These standards are based on evacuation capacity, not on creating a cozy atmosphere.

What you should always know:

• Every venue has a legal maximum capacity. This is specified in the venue’s operating permit—always ask for it.
• Emergency exits must be kept clear at all times. Do not place catering tables or decorations in front of them.
• Aisles between rows of seats are at least 1.2 meters wide.
• For standing events with more than 250 attendees, a safety section is required in the event plan.

Crowd management is a separate issue. The entrance and coat check are the most underestimated space-eaters. With 400 people entering at once, 400 coats, and 400 pairs of eyes looking for the bar, you need space and coordination. Plan for an entrance buffer area of 30 to 50 square meters for events with more than 150 attendees.

With this calculation in hand, you’ll approach your search for a location differently. You’ll no longer rely on the gross floor area listed in the brochure, but will base your decision on what you actually need.

Ask these questions about each potential location:

• What is the net usable floor area for guests?
• Is there a stage—and how big is it?
• Where is the bar located? In the room or in a separate area?
• Is there enough technical space for lighting and sound?
• What is the maximum legal capacity specified in the operating license?

A good venue manager answers these questions without hesitation. One who only mentions the gross dimensions and changes the subject is a red flag. For every assignment, we scout multiple venues based on exactly these criteria—not on the brochure, but on the actual floor measurements.

Event planning is an exact science. But it only becomes a successful event when it aligns with the story you want to tell.

Tell us about your event via our briefing page, or contact us directly via the contact page.

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