Examples
Examples
Try the starting example
- Room width (m)
- 12
- Room depth (m)
- 10
- Chair cell width (m)
- 0.5
- Chair row pitch (m)
- 1
- Columns per chair block
- 4
- Rows per chair block
- 5
- Aisle between blocks across width (m)
- 1
- Gap between blocks along depth (m)
- 1
- Perimeter clearance each edge (m)
- 0.5
- Blocks across room
- 4
- Blocks down room
- 1
- Chair count in complete blocks
- 80
- Block-grid span across (m)
- 11
- Block-grid span down (m)
- 5
- Floor area outside chair blocks (m²)
- 80
Try another scenario
- Room width (m)
- 5
- Room depth (m)
- 5
- Chair cell width (m)
- 1
- Chair row pitch (m)
- 1
- Columns per chair block
- 2
- Rows per chair block
- 2
- Aisle between blocks across width (m)
- 0.5
- Gap between blocks along depth (m)
- 0.5
- Perimeter clearance each edge (m)
- 0
- Blocks across room
- 2
- Blocks down room
- 2
- Chair count in complete blocks
- 16
- Block-grid span across (m)
- 4.5
- Block-grid span down (m)
- 4.5
- Floor area outside chair blocks (m²)
- 9
Calculation method
Calculation method
Blocks across room
Floor((usable room width + aisle)/(chair cell width × columns per block + aisle)).
Blocks down room
Floor((usable room depth + gap)/(row pitch × rows per block + gap)).
Chair count in complete blocks
Block columns × block rows × chairs per block.
Block-grid span across (m)
Block columns × block width + internal aisles only.
Block-grid span down (m)
Block rows × block depth + internal gaps only.
Floor area outside chair blocks (m²)
Room area − combined rectangular area of chair blocks; includes aisles and clearances.
Symbols and units
- a
- Room width (m)
- b
- Room depth (m)
- c
- Chair cell width (m)
- d
- Chair row pitch (m)
- e
- Columns per chair block
- f
- Rows per chair block
- g
- Aisle between blocks across width (m)
- h
- Gap between blocks along depth (m)
- i
- Perimeter clearance each edge (m)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Uniform rectangular chair blocks with user-selected aisles and edge clearances. Chair cell dimensions must already include the space allocated per chair. This is a geometric proposal, not legal occupancy, access, egress or fire-safety certification.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.