Parking Ratio Calculator

A parking ratio is a measurement that expresses the relationship between a building's size and its parking capacity. It is typically expressed as the number of parking spaces per 1,000 square feet of building area.

Parking ratios are important for:

• Planning assumptions and space comparisons
• Property valuation
• Tenant satisfaction
• Development planning
• Property management

The basic formula for calculating parking ratio is:

Parking Ratio = (Number of Parking Spaces ÷ Building Area) × 1,000

Enter a positive area and a non-negative whole-space count. Zero spaces gives a zero density. The optional target is selected by you; an explicit zero target is different from leaving it blank.

Additional calculations when a target is entered include:

• Spaces for Target: round up (Building Area × Target Ratio ÷ 1,000) to the next whole space
• Surplus/Deficit: Actual Spaces - Spaces for Target

There is no single target ratio for every property. The calculator uses the target you enter; choose it from planning assumptions for the specific property and location.

• Target assumptions and property use
• Property type and usage patterns
• Public transportation accessibility
• Shared parking opportunities
• Peak usage times and patterns
• Future development plans
• Environmental and sustainability goals