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Calcimator

Parking Ratio Calculator

Calculate parking ratios, required spaces, and parking construction costs for commercial properties.

Inputs

SF
per 1,000 SF
SF
$/space
$/space
%

Results

Actual Ratio

4 per 1,000 SF

Required Spaces

200

Surplus / Deficit0
Total Parking Area65,000 SF
Parking-to-Building Ratio130%
Total Parking Cost$1,000,000.00
Parking Cost per Bldg SF$20.00
How to Use This Calculator
  1. Enter Building Size in square feet and Total Parking Spaces available.
  2. Set Required Ratio (spaces per 1,000 SF) from the zoning code for your land use.
  3. Enter Avg Space Size in SF (325 SF per space including drive aisle is standard).
  4. Input Surface Cost and Structured Cost per space if evaluating construction of additional parking.
  5. Set % Structured to blend surface and garage costs.
  6. Review Actual Ratio vs. Required Spaces — a positive Surplus/Deficit indicates compliance or shortfall.

How the result changes with Building Size

Building SizeActual RatioRequired Spaces
500,9000.4 per 1,000 SF2,004
1,750,6500.11 per 1,000 SF7,003
3,250,3500.06 per 1,000 SF13,002
4,500,1000.04 per 1,000 SF18,001

What each input means

Building Size
Total building gross leasable area.
Parking Spaces
Total number of parking spaces provided.
Required Ratio
Zoning-required parking spaces per 1,000 SF.
Avg Space Size
Average area per parking space including drive aisle (325 SF typical).
Surface Cost
Construction cost per surface parking space.
Structured Cost
Construction cost per structured/garage parking space.
% Structured
Percentage of spaces in structured parking.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Building Size = 50000, Parking Spaces = 200, Required Ratio = 4, Avg Space Size = 325 = 7 input(s) provided
  2. Calculate Actual Ratio
    Actual Ratio
    4 = 4
  3. Calculate Required Spaces
    Required Spaces
    200 = 200
  4. Calculate Surplus / Deficit
    Surplus / Deficit
    0 = 0
  5. Calculate Total Parking Area
    Total Parking Area
    65000 = 65000

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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