Parking Demand Calculator

Estimate required parking spaces from land use type and building size using ITE Parking Generation rates, with adjustments for shared parking and transit.

Inputs

Land Use Type

Gross Floor Area

sq ft

Shared Parking Reduction

Transit Mode Share

Tab to move between fields

Results

Recommended Spaces

148

Base Demand (ITE)174 spaces

Peak Demand148 spaces

ADA Accessible Spaces5

ITE Rate3.47

Rate Basisper 1,000 sq ft

Estimated Lot Area51,800 sq ft

Estimated Lot Area1.19 acres

How to Use This Calculator

Enter Land Use Type, General Office, and Retail / Shopping Center.
Set Restaurant, Residential Apartment, and Medical Office.
Adjust Gross Floor Area, Dwelling Units as needed.
Review the Recommended Spaces result.
Use Base Demand (ITE) (spaces) and Peak Demand (spaces) to inform your decision.

How the result changes with Gross Floor Area

Gross Floor Area	Recommended Spaces
100,450	297
350,325	1,034
650,175	1,918
900,050	2,655

What each input means

Land Use Type: Select the primary land use. Rates are based on ITE Parking Generation Manual.
Gross Floor Area: Total gross floor area of the building. Not used for residential (uses dwelling units instead).
Dwelling Units: Number of residential units (only used for residential land use type).
Shared Parking Reduction: Reduction for shared parking in mixed-use developments. Typically 10-30%.
Transit Mode Share: Estimated percentage of trips shifted to transit, reducing parking need.

How this is calculated

Worked example, using the default values

Identify Input Parameters
4 parameters
Land Use Type = 1, Gross Floor Area = 50000, Dwelling Units = 0, Shared Parking Reduction = 0 = 5 input(s) provided
Calculate Recommended Spaces
Recommended Spaces = ceil(adjustedSpaces)
148 = 148
Calculate Base Demand
174 = 174
Calculate Peak Demand
Peak Demand = ceil(peakSpaces)
148 = 148