Parking Ratio Calculator — Spaces per 1,000 sq ft
Enter the number of parking spaces and the gross leasable area of your building to get the parking ratio in spaces per 1,000 sq ft, then compare it to industry benchmarks for your property type.
spaces
Area unit
Building type
Number of parking spaces per 1,000 sq ft of gross leasable area
- 1
Area in 1,000 sq ft blocks
30,000 ÷ 1,000 = 30 - 2
Parking ratio
120 ÷ 30 = 4
How does this calculator work?
Parking ratio = spaces ÷ (GLA ÷ 1,000), expressed as spaces per 1,000 sq ft. Industry standards vary widely: offices ~3.3, retail ~4, restaurants ~10, industrial ~1, medical ~5 — all per 1,000 sq ft. Local zoning codes govern legal requirements; these benchmarks are US market estimates (2024).
Formula
How this is calculated
The parking ratio is the standard real estate metric that expresses parking supply relative to building size — typically quoted as spaces per 1,000 square feet of gross leasable area (GLA). A 30,000 sq ft office with 120 spaces has a ratio of 120 ÷ 30 = 4.0/1,000 sq ft. Higher ratios mean more generous parking; lower ratios may indicate undersupply depending on the building type.
Industry benchmarks (from sources such as ITE Parking Generation and BOMA) vary significantly by use: general offices typically target 3–4 spaces/1,000 sq ft, retail shopping centres 4–5, restaurants 8–15 (because dining rooms are dense and turnover is high), and industrial warehouses as little as 0.5–1. Residential buildings are usually measured in spaces per unit rather than per area; the benchmarks above are approximate typical ranges for US markets as of 2024 — local zoning codes set legal minimums and maximums and may differ.
The calculator converts square metres to square feet when you choose m², and also reports the inverse (square feet and square metres per space) which is useful for layout planning.
Frequently asked questions
US office buildings typically target 3.0–4.0 spaces per 1,000 sq ft. Suburban locations often aim for 4:1,000 (one space per 250 sq ft), while urban centres with good transit access may be adequate at 2:1,000 or lower. Local zoning codes define the legal minimum — check your municipality.
Restaurant seating is dense (15–20 sq ft per person) and turnover is high, so a 3,000 sq ft restaurant can serve 100+ diners simultaneously — each arriving by car. This drives demand to 10–15 spaces per 1,000 sq ft of dining area, far higher than office or retail.
Yes — select "m²" in the area unit selector and the calculator converts to square feet internally before computing the ratio. The result is still expressed as spaces per 1,000 sq ft (the industry standard unit); the m² per space figure is shown as a secondary stat.
Also known as
TG we-Calculate Editorial Team. (2026). Parking Ratio Calculator — Spaces per 1,000 sq ft [Online calculator]. TG we-Calculate. https://we-calculate.com/calculator/parking-ratio-calculator
TG we-Calculate Editorial Team. "Parking Ratio Calculator — Spaces per 1,000 sq ft." TG we-Calculate. 2026. https://we-calculate.com/calculator/parking-ratio-calculator.
TG we-Calculate Editorial Team, "Parking Ratio Calculator — Spaces per 1,000 sq ft," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/calculator/parking-ratio-calculator
@misc{wecalculate_parking_ratio_calculator, title = {Parking Ratio Calculator — Spaces per 1,000 sq ft}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/calculator/parking-ratio-calculator}}, year = {2026}, note = {TG we-Calculate} }
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