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Event Space Capacity Calculator

Work out event space capacity instantly with clear inputs, formula shown and shareable results.

About Event Space Capacity Calculator

Event capacity is net usable area divided by the area per person that the layout requires. Banquet rounds need roughly twice the area per person of theatre seating, and circulation, staging and service routes typically absorb a further 20-30% of the room.

Formulas

Net usable area

Net area = (Floor area - Obstructed area) x (1 - Circulation allowance %)

Capacity

Capacity = Net usable area / Area per person for the layout

Worked example

With the default values below, Event Space Capacity Calculator returns Capacity in this layout of 187. Change any input above and every figure here is recalculated in your browser.

Inputs used

Usable floor area
420 m2
Layout styleone of Theatre / rows of chairs, Banquet round tables, Cabaret, Standing reception
Banquet round tables
Circulation, stage and service allowance
25
Obstructed or unusable area
20 m2

Results

Capacity in this layout
187
Net usable area
300.0
Area allowed per person
1.60
Area lost to circulation and obstruction
120.0

Step by step

  1. 1Values used
  2. 2Net usable area
  3. 3Capacity
  4. 4Capacity in this layout= 187
  5. 5Net usable area= 300.0
  6. 6Area allowed per person= 1.60
  7. 7Area lost to circulation and obstruction= 120.0

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Do fire regulations override this?

Yes, always. Licensed capacity and exit width requirements are absolute limits regardless of what the area calculation permits.

Why does cabaret need more space than banquet?

Because tables are only partly seated to keep sightlines to the stage clear, so the same table serves fewer guests.

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