Parking Space Requirement Calculator
Estimate how many parking spaces a development needs using gross floor area and code ratios.
Preliminary estimate only. Always reconcile with stamped site plans, traffic engineering studies, and municipal approvals.
Examples
- 85,000 ft² office / 325 ft² per stall ⇒ 262 spaces before rounding
- 24,000 ft² retail / 300 ft² per stall ⇒ 80 spaces (round up to 81)
- 12,500 ft² clinic / 250 ft² per stall ⇒ 50 spaces for medical zoning
FAQ
Where can I find the correct area-per-space factor?
Check your jurisdiction's zoning ordinance or traffic impact study; factors differ for offices, retail, residential, and assembly uses.
How do accessible spaces affect the count?
Use this total as a baseline, then allocate ADA-compliant stalls per accessibility standards without reducing the minimum count.
Can I convert to square metres?
Yes. Convert inputs to square metres and square metres per space (≈ 27–32 m²/stall) to run the same calculation.
Does shared parking change the result?
Shared-parking agreements or transit-oriented developments may allow reductions. Apply the negotiated reduction factor to this output.
Additional Information
- Area per space bundles the parking stall footprint plus circulation aisles, landscaping, and setbacks specified by code.
- After computing, round up to the next whole number to maintain compliance with minimum parking requirements.
- Adjust the divisor for mixed-use developments by applying weighted averages or parking demand studies.