Restaurant seating capacity calculator
Enter the dining room's size and service style for a seat range, the code's occupant load and the accessible seats.
Seating capacity estimator
Measure the dining room only: leave out the kitchen, washrooms and entry.
Estimated seats · casual dining
68 to 79 seats
- Dining room area
- 96.0 m² (1,033 ft²)
- At 15 ft² a seat
- 1,033 ÷ 15 = 68.9 → 68 seats
- At 13 ft² a seat
- 1,033 ÷ 13 = 79.5 → 79 seats
- Code occupant load
- 1,033 ÷ 15 = 68.9 people (tables and chairs)
- Accessible seats
- At least 4 (5% of the seats, rounded up)
79 seats is more than the code's occupant load of 68.9 here: the code allows a larger occupant load if every other requirement (exits, aisles, fixtures) is met for the larger number, up to one person per 7 ft² (147 people), and the building official may require an approved seating diagram.
Planning guidance, not a code or compliance check. Sources: area per seat, Thibodeaux, Restaurant Design, 7.5 [1]; occupant load, IBC Table 1004.5 and §1004.5.1 [2]; accessible seats, 2010 ADA Standards §226.1 [3].
From the restaurant floor plans guide, with an editable template, pictures and more figures.
METHOD
How the calculation works
Seats come from floor area: the room's area divided by the floor each seat takes, for the service style's published range [1]. Seats are whole and never rounded up.
- Dining room area
- length × width, in m² and in ft² (1 ft² = 0.09290304 m²)
- Fewest seats
- area in ft² ÷ the style's largest ft² per seat, rounded down
- Most seats
- area in ft² ÷ the style's smallest ft² per seat, rounded down
- Code occupant load
- area in ft² ÷ 15 net ft² per person (tables and chairs)
- Accessible seats
- 5% of the seats, rounded up to whole seats
Worked example
The calculator's starting values: a 12 × 8 m casual dining room (13 to 15 ft² a seat).
- Area
- 12 × 8 m = 96.0 m² (1,033 ft²)
- Fewest seats
- 1,033 ÷ 15 = 68.9 → 68 seats
- Most seats
- 1,033 ÷ 13 = 79.5 → 79 seats
- Code occupant load
- 1,033 ÷ 15 = 68.9 people
- Accessible seats
- 5% of 68 and of 79, rounded up: at least 4
- Result
- 68 to 79 seats
Here the most seats exceed the code's occupant load; the calculator then says what the code asks for a larger number.
FIGURES
The figures it uses
| Figure | Value | How the calculator uses it | Source |
|---|---|---|---|
| Quick service | 10–12 ft² (0.93–1.11 m²) a seat | The two ends of the seat range for this service style | Thibodeaux, Restaurant Design, 7.5 [1] |
| Casual dining | 13–15 ft² (1.21–1.39 m²) a seat | The two ends of the seat range for this service style | Thibodeaux, Restaurant Design, 7.5 [1] |
| Table service (upscale) | 16–20 ft² (1.49–1.86 m²) a seat | The two ends of the seat range for this service style | Thibodeaux, Restaurant Design, 7.5 [1] |
| Occupant load, tables and chairs | 15 net ft² a person | The number of people the code sizes exits for | IBC 2021 Table 1004.5 [2] |
| Increased occupant load | 1 person per 7 ft² at most | The limit named when the most seats exceed the occupant load | IBC 2021 §1004.5.1 [2] |
| Accessible seating | 5% of seats | Seats at dining surfaces that are accessible, at least; rounded up | 2010 ADA Standards §226.1 [3] |
A textbook's planning ranges and US model code and standard figures, as published. Your jurisdiction's adopted code may number, amend or add to them.
A seat range from floor area is a first estimate, not a seating plan or an occupancy permit. Confirm seats, exits and accessibility with your building authority and a qualified professional.
QUESTIONS
Questions about this calculator
Which floor area should I enter?
The dining room only, measured inside its walls: leave out the kitchen, washrooms and entry. The per-seat ranges come from a restaurant design textbook's table for the dining area, so the area to divide is the dining area. [1]
Why does the calculator give a range, not one number?
Each service style has a published range of floor area per seat; casual dining is 13 to 15 ft². The larger figure gives the fewer seats and the smaller figure the more. Where a real room lands depends on its tables, booths and walkways, which the planner lets you lay out. [1]
Why can the seat count be higher than the occupant load?
The code counts one person per 15 net ft² of a dining area with tables and chairs, while a quick-service room can seat one person per 10 ft². The code allows a larger occupant load if exits, aisles and fixtures are designed for it, up to one person per 7 ft², and the building official may ask for an approved seating diagram. [1, 2]
Does the estimate include bar or counter seats?
No. It counts seats from the dining room's floor area with the textbook's dining-area figures. Bar stools and counter seats depend on the bar's length, so plan them separately, in the planner or with your supplier.
How do I check the estimate in a real layout?
Open the restaurant template, change the room to your size and place your own tables. The planner's Space around lists each table's gaps and flags tight ones, as guidance, and the table spacing calculator checks one walkway in detail.
References
Sources of the figures this calculator uses.
- Restaurant Design: Concept to Customer, 7.5 Spatial Aspects of RestaurantWilliam R. Thibodeaux, Chef John Folse Culinary Institute, Nicholls State University; Workforce LibreTexts (CC BY-NC-SA 4.0). Dining Area: the space range per seat in quick service (10 to 12 ft²), casual (13 to 15 ft²) and luxury (16 to 20 ft²) dining rooms; Seating and Tables: an equal balance of two-tops and four-tops.
- 2021 Illinois Building Code (the 2021 International Building Code as adopted): Section 1004.5, Areas without fixed seatingUpCodes. Table 1004.5, Maximum floor area allowances per occupant (assembly without fixed seats, unconcentrated: tables and chairs, 15 ft² net); Section 1004.5.1, Increased occupant load (at most one occupant per 7 ft²).Model-code text as adopted by one state; the International Code Council's own text was not checked. Your jurisdiction's adopted edition decides.
- 2010 ADA Standards for Accessible DesignU.S. Access Board. §226.1, dining surfaces (at least 5 percent of seating); §305.3, clear floor space 30 x 48 in (760 x 1220 mm); §304.3.1, turning space 60 in (1525 mm); §403.5.1, walking surfaces 36 in (915 mm); §902.3, dining surface height 28 to 34 in (710 to 865 mm).
Lay out the seats in the restaurant template
An editable 2D plan, 3D view and walkthrough. No sign-up to try.
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