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Commercial Revolving Door Vestibule Footprint Calculator

Calculate the circular floor footprint area needed for a revolving door and its surrounding clearance.

Computed in your browser — nothing you enter is uploaded. Figures are presented for United States against IRC 2024, and every formula is cited under regulatory standards below.

Last verified 2026-08-26 · v1.0.0

Market
Imperial · sales tax
7.22 ft
Schematic, drawn to the proportions you entered — not to scale on screen.

Required vestibule footprint area

66.28 ft²

Check your inputs

Clearance allowance and exact footprint shape vary by manufacturer and door configuration (3-wing vs. 4-wing, manual vs. automated) — confirm the specific unit's required footprint from its installation drawings.

For the dimensions entered, expect a required vestibule footprint area of 6.16 m². Moderate confidence — sound arithmetic, but allow for the variation any real site introduces. Set for United States against IRC 2024. The market selector changes both the units and the code cited.

Estimated cost — your price

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — confirmed fixes become pinned regression tests.

[Schema Verified] Computed in alignment with American Concrete Institute (ACI 318-19) formulas and International Residential Code (IRC 2024) spatial boundaries.

Regulatory standards & verification citations

  • Footprint area = π × (Door Diameter ÷ 2 + Clearance)² — the standard method for estimating the circular floor space a revolving door assembly (drum, wings, and enclosure) requires, including a surrounding clearance allowance from the specific door manufacturer's installation drawings.

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Frequently asked questions

How is the revolving door vestibule footprint calculated?
Footprint area = π × (Door Diameter ÷ 2 + Clearance)², treating the door plus its surrounding clearance as a circle — the standard method for estimating the floor space a revolving door assembly (drum, wings, and enclosure) requires.
Where does the clearance allowance value come from?
It should come from the specific door manufacturer's installation drawings — the required clearance varies by manufacturer and door configuration (3-wing vs. 4-wing, manual vs. automated).
Is the actual footprint always a perfect circle?
This calculator models it as a circle for estimating purposes, but the exact footprint shape varies by manufacturer and configuration — always confirm the required footprint from the specific unit's installation drawings.