π Social Distancing Capacity
Safe room occupancy with distanced spacing.
For informational purposes only, not medical advice. Consult a healthcare professional.
Physical distancing capacity is floor area divided into spaced positions: with 6-foot spacing, each person needs a 6-by-6-foot grid cell, or 36 square feet. A 30-by-20-foot room grids into 5 by 3 positions, 15 people. This calculator runs that grid math for event planners, venues, classrooms, and workplaces setting safe occupancies. It computes geometry, not epidemiology: local rules, ventilation, and activity type decide the spacing input.
How to Use This Calculator
Enter the usable room length and width in feet and the required spacing. The calculator grids the floor into distanced positions.
Measure the usable floor area, subtracting stages, tables, and fixtures that block positions.
Enter the required center-to-center spacing, 6 feet for the classic guidance, or your local rule.
Read the capacity. The grid math rounds down, and aisles or exits may reduce it further.
How the Math Works
Divide the room length by the spacing and round down for positions along the length; do the same for the width; multiply. A 30-foot wall at 6-foot spacing fits 5 positions, a 20-foot wall fits 3, for 15 total. The grid method is conservative versus circle packing and matches how venues actually lay out chairs. Usable area excludes fixed obstructions, and the result assumes uniform spacing; aisles, doors, and accessibility needs reduce real capacity further. Square footage per person is simply total positions divided into the area.
Worked Example
A 30 by 20 foot room with 6-foot spacing fits 15 distanced positions. That is 40 square feet per person of usable floor, slightly above the theoretical 36 because the grid rounds down at the walls. A classroom needing 20 students would require roughly 720 square feet at this spacing, which is why distancing reshaped every venue floor plan.
Reading Your Result
Use the number as the planning maximum, then subtract for reality: entry and exit flow, accessible seating, presenter space, and local code limits. Tighter spacing raises capacity but needs justification from current guidance, better ventilation, or masking policies. The calculator is geometry; the policy input comes from your local health authority and the nature of the gathering.
| Spacing | Sq ft per person | 30x20 room |
|---|---|---|
| 3 ft | 9 | 60 people |
| 6 ft | 36 | 15 people |
| 10 ft | 100 | 6 people |
Limitations
The grid is a planning approximation: real layouts lose positions to doors, aisles, furniture, and accessibility requirements. It does not model airflow, exposure time, masking, or vaccination, which all modify transmission risk. Follow current local public health guidance for the spacing value; this tool only does the geometry.
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For informational purposes only, not medical advice. Consult a healthcare professional.
Frequently Asked Questions
How do you calculate social distancing capacity?
Divide each room dimension by the required spacing, round down, and multiply. A 30x20 ft room at 6 ft spacing gives 5 x 3 = 15 positions. Subtract space for aisles, doors, and fixtures from the usable area first.
How many square feet per person for 6-foot distancing?
36 square feet in a pure grid, more in practice after aisles and fixtures. Venues often plan 40 to 50 per person at 6-foot spacing once circulation is included.
Is 6 feet still the guidance?
Guidance evolved: 6 feet was the classic COVID-era rule, later guidance emphasized ventilation, exposure time, and layered protections. Use your current local public health rule as the spacing input; the calculator handles any value.
Does distancing work outdoors?
Outdoor transmission is far lower than indoor thanks to dilution, but spacing still reduces risk in dense crowds. Outdoor events generally use lighter spacing rules, if any, per local guidance.
What about ventilation?
Ventilation may matter more than exact spacing indoors: outdoor-air exchange dilutes aerosols that spacing alone does not address. The best plans combine reasonable spacing with verified ventilation, not spacing alone.
How do classrooms use this?
By gridding desk positions at the required spacing and subtracting teacher space, aisles, and door swings. Many schools found real capacity ran 60 to 70 percent of the pure grid number.
Can I use meters instead of feet?
Convert first: 1 meter is 3.28 feet, so 2-meter spacing is about 6.6 feet. Enter the converted dimensions and spacing. The math is unit-agnostic once consistent.
Do masks change the capacity?
Policy-wise sometimes: some guidance allowed tighter spacing with universal masking. The calculator does not decide that; your local rules do. Enter the spacing your policy specifies.
What is the difference between capacity and occupancy?
Capacity is the physical maximum; legal occupancy adds fire codes, exits, and accessibility. Distanced capacity must satisfy both: take the lower of the distanced number and the code limit.
How should venues mark positions?
Floor markers, spaced seating maps, and one-way flow signage. The calculation is only half the job; communicating the layout so people actually keep the spacing is the other half.