Free browser-based calculator

Parking Lot Capacity Calculator

Estimate preliminary parking capacity after aisles, accessible-space area, islands, pedestrian routes and site-efficiency allowances.

Project inputs

Change the assumptions to explore an early planning scenario.

Planning result

Enter your assumptions

  • Net layout area
  • Regular-space allowance
  • Accessible-space reservation
  • Preliminary total spaces

How to use this result

The calculator uses gross area per regular space, not just painted-stall area. Enter the accessible count from current local requirements or use the separate accessible-space calculator.

Gross-space factor

The layout factor includes an allowance for parking stalls and drive aisles.

Accessible reservation

Larger spaces and access aisles are reserved explicitly rather than treated as regular stalls.

Important: This is a feasibility estimate. Final capacity requires a surveyed site plan, turning checks, zoning, accessibility, fire, drainage and entrance review.