The most common mistake in venue selection

Gross area is the total floor surface of the room: measured wall to wall. Net area is what's left after you subtract every non-usable element.

What counts as a deduction?

• Stage or speaker platform (4 to 60 m², depending on scale)
• Bar and catering setup (10 to 30 m²)
• DJ booth or AV space (4 to 20 m²)
• Cloakroom or entrance area (10 to 25 m²)
• Compulsory escape routes and aisles (minimum 1.2 m wide, legally required)
• Production space for lighting and sound (0 to 40 m²)

As a rule of thumb: net is 60 to 75% of gross. Brochure says "600 m²"? In practice you've got 360 to 450 m² available for your guests. Factor that in when you pick your venue. More on how to compare venues on equal terms in our article on venue scouting for events →

How much space you need per person depends entirely on how you set up the room. These are the standard norms:

• Theatre (rows of seats, no tables): 0.7 to 0.9 m² per person
• Cabaret (small tables with chairs): 1.2 to 1.5 m² per person
• Boardroom (rectangular meeting table): 2.0 to 2.5 m² per person
• Gala dinner / banquet (round tables): 1.5 to 2.0 m² per person
• Cocktail / standing: 0.5 to 0.8 m² per person
• Combined (programme + dinner): 1.8 to 2.5 m² per person

Note: an evening that combines a theatre moment with a dinner needs two setups. That means either a bigger room, or a rig changeover during the event. Both options need time and logistics. Plan for it up front.

The maths isn't complicated. This step-by-step works for any type of event.

Step 1: Lock in the guest count. Always use the maximum number, not the expectation. 180 confirmations easily turn into 210 on the night.

Step 2: Pick your setup type. Is it a standing networking reception, a dinner, or a programme evening with rows of seats?

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

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

Step 5: Add the production deductions. Big stage or extensive catering setup? Add 50 to 100 m² to your search criteria.

In this example you're looking for a room of at least 600 m² gross for a gala dinner with 200 guests: not 800 m², but not 400 m² either. Want to know exactly which other factors shape your planning? Read our complete event planning checklist →

Space planning isn't only about comfort. The fire service and the council set rules for the maximum occupancy of a room. Those norms are based on evacuation capacity, not on conviviality.

What you always need to know:

• Every room has a legal maximum capacity. It's stated in the venue's operating licence. Always ask for it.
• Emergency exits must be kept clear at all times. No catering tables or décor in front of them.
• Aisles between rows of seats are at least 1.2 m wide.
• Standing events above 250 people require a safety section in the run sheet.

Crowd management is a separate question. The entrance and cloakroom are the most underestimated space hogs. 400 people coming in at the same time, 400 coats and 400 pairs of eyes scanning for the bar: that takes space and direction. Plan an entrance buffer of 30 to 50 m² for events above 150 people.

With this calculation in hand, you search for a venue differently: no longer on the gross figure in the brochure, but on the basis of what you actually need.

Ask every potential venue these questions:

• What's the net floor area available for guests?
• Is there a stage on site, and how big is it?
• Where is the bar? In the room or separate?
• Is there enough AV space for lighting and sound?
• What's the legal maximum capacity according to the operating licence?

A good venue manager answers these questions without hesitation. One that only quotes the gross figures and steers the conversation elsewhere is a signal. We visit multiple venues for every brief on exactly these criteria: not on the brochure, but on the measurements on the floor.

Space planning is exact science. But it only becomes a good event when those numbers fit the story you want to tell.

Email us at hello@live-impact.nl or call us on 085 401 40 14.

Seriously fun.

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