THE NUMBERS, EXPLAINED
How to use this calculator.
Conceptual double-loaded aisle module: each vehicle is allocated one bay plus half the aisle depth, then your circulation allowance. It does not certify lawful capacity or accessible-space compliance.
Start with your inputs
Enter vehicles, bay width (m), bay depth (m), shared aisle width (m), additional circulation allowance (%). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Vehicles | 100 |
| Bay width (m) | 2.5 |
| Bay depth (m) | 5 |
| Shared aisle width (m) | 6 |
| Additional circulation allowance (%) | 15 |
A worked example
With the example inputs above, module area per vehicle (m²) is 20. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Module area per vehicle (m²) | 20 |
| Base parking module area (m²) | 2,000 |
| Conceptual area with circulation (m²) | 2,300 |
How this is calculated
Module area per vehicle (m²)
Area per vehicle = bay width × (bay depth + aisle width/2).
Base parking module area (m²)
Base area = vehicles × area per vehicle.
Conceptual area with circulation (m²)
Conceptual area = base area × (1 + circulation percentage/100).
Symbols and units
- a
- Vehicles
- b
- Bay width (m)
- c
- Bay depth (m)
- d
- Shared aisle width (m)
- e
- Additional circulation allowance (%)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Conceptual double-loaded aisle module: each vehicle is allocated one bay plus half the aisle depth, then your circulation allowance. It does not certify lawful capacity or accessible-space compliance.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Module area per vehicle (m²); Base parking module area (m²); Conceptual area with circulation (m²). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Conceptual double-loaded aisle module: each vehicle is allocated one bay plus half the aisle depth, then your circulation allowance. It does not certify lawful capacity or accessible-space compliance.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: rectangle area and percentages ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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