Calculator inputs
Results appear above this form after you calculate.
Formula used
Percentage base:
Apct = Agross × (P / 100)
Unit base:
Aunits = (Nk × Ak) + (Nc × Ac)
Selected base (by mode):
- Percentage mode: Abase = Apct
- Unit mode: Abase = Aunits
- Combined mode: Abase = max(Apct, Aunits)
Allowances applied sequentially:
Afinal = Abase × (1 + C/100) × (1 + S/100) × (1 + T/100)
Where C = circulation, S = support/storage, T = contingency.
How to use this calculator
- Pick input and output units for consistent reporting.
- Choose a mode: percentage for early planning, units for detailed counts, or combined for conservative sizing.
- Enter gross area and either a concession percentage or unit counts and areas.
- Add circulation and support allowances based on your layout strategy.
- Click Calculate, then export CSV/PDF for records.
Example data table
Example values below show how allowances change the recommended area.
| Gross area (m²) | Concession % | Kiosks × area | Counters × area | Circulation % | Support % | Contingency % | Recommended (m²) |
|---|---|---|---|---|---|---|---|
| 1200 | 3.5 | 4 × 8 | 2 × 14 | 18 | 12 | 5 | ≈ 67.00 |
| 2500 | 2.5 | 6 × 10 | 3 × 18 | 15 | 10 | 5 | ≈ 118.20 |
| 800 | 4.0 | 2 × 7 | 1 × 12 | 20 | 15 | 0 | ≈ 41.40 |
Example outputs are illustrative; your project may require different allowances.
Professional planning notes
1) Define the concession program early
Start by confirming what “concessions” includes on your site: kiosks, counters, vending bays, ticketing, or temporary food service. A clear program reduces redesign. Early-stage planning often allocates 1–6% of gross area to concessions, then validates by counts.
2) Use percentage mode for quick feasibility
When only gross area is known, a percentage provides a fast baseline. For example, a 1,200 m² facility at 3.5% yields 42.0 m² before allowances. This is ideal for concept layouts, budgeting, and comparing options across multiple sites or phases.
3) Use unit mode when vendor counts are known
If you already know the mix, build from kiosk and counter footprints. Four kiosks at 8 m² plus two counters at 14 m² equals 60 m² of front-of-house. This method reflects real geometry and is helpful for fit-out drawings and tenant coordination.
4) Apply circulation and support allowances realistically
Concession layouts need queuing and access. Circulation allowances commonly range 10–30% depending on aisle widths, safety clearances, and peak crowding. Support/storage is frequently 5–20% for back-of-house, waste handling, utilities, and restocking paths.
5) Add contingency and round for modular construction
A contingency of 0–10% protects against scope growth, equipment changes, and code-driven adjustments. Finally, round results to match modular bay sizes or grid dimensions. Rounding helps align with shop drawings, procurement packages, and tender documentation.
FAQs
1) Which mode should I choose?
Use percentage mode for early feasibility, unit mode when counts are known, and combined mode when you want the safer (larger) base before allowances.
2) What does circulation allowance represent?
It covers aisles, customer queuing, access clearances, and circulation around fixtures. Higher values fit busy sites, narrow corridors, or strict safety separation requirements.
3) Why apply allowances sequentially instead of adding them?
Sequential multipliers reflect how each allowance expands the prior layout. It also keeps the method consistent when different teams own different components of the area program.
4) How do I estimate kiosk and counter areas?
Use footprint plus working clearance and customer standing space. Start with typical module sizes from your vendor catalogs, then confirm with equipment schedules and queue studies.
5) Should support/storage be included in kiosk area?
If the kiosk footprint already includes back-of-house storage, reduce the support allowance. If storage is separate or shared, keep support as a project-level percentage.
6) Can I calculate in ft² and export reports?
Yes. Select ft² as input and/or output unit. The calculator converts internally and exports CSV/PDF using the chosen output unit for consistent reporting.
7) How accurate is the result?
It is a planning estimate. Validate against local codes, operator requirements, and layout drawings. Update inputs as the program and circulation strategy become clearer.