Inputs
White theme • Client + Server computeResults
Seats per long side: 3 (each)
Seats per end: 1 (each)
Total seats: 8
Required room length: 180 in
Required room width: 144 in
Fits within provided room dimensions.
Example Scenarios
Typical setups illustrating capacity and required room clearances.
| Shape | Table Size | Seat width | Chair depth | Walkway | Total seats | Req. room (L×W or Ø) |
|---|
Formulas Used
- Seats on each long side (rectangle): ⌊Length ÷ SeatWidth⌋
- Seats on each end (rectangle): ⌊Width ÷ SeatWidth⌋
- Total seats (rectangle or square): 2×SideSeats + 2×EndSeats (if enabled)
- Total seats (round): ⌊π × Diameter ÷ SeatWidth⌋
- Required room length: TableLength + 2 × (ChairDepth + WalkwayClearance)
- Required room width: TableWidth + 2 × (ChairDepth + WalkwayClearance)
- Required room diameter (round): TableDiameter + 2 × (ChairDepth + WalkwayClearance)
Note: If 2 × PlaceSettingDepth > TableWidth, opposite settings may feel cramped.
How to Use This Calculator
- Select your Units and Table Shape.
- Enter table dimensions and ergonomic preferences: Seat Width, Chair Depth, Walkway Clearance, and Place Setting Depth.
- For rectangles, toggle whether you seat people on sides and ends.
- Optionally enter Room Length/Width to validate spatial fit.
- Press Compute Instantly for live results or submit for server compute.
- Use Download Results CSV/PDF to export specifications for documentation.
Comfort guidelines: seat width 22–26 in, walkway 36–48 in are common.
FAQs
A common allowance is 24 inches (61 cm) per person for comfortable elbow room. For larger chairs or armrests, 26–30 inches may feel better.
Allow at least 36 inches (91 cm) for pulling chairs out and circulation. In tight spaces, 32 inches may work, while 42–48 inches feels generous.
Yes. Pedestals and trestle bases free up corners and legroom, sometimes adding a seat compared with four corner legs. The calculator assumes clear edges unless noted.
Multiply your target seat count by seat width per person to get needed circumference. Divide by π to estimate diameter. Example: 8 × 24 ÷ π ≈ 61 inches.
Chair depth is the footprint of the chair at the table. Walkway clearance is the additional aisle behind the chair so people can pass while someone is seated.
If two place-setting depths exceed the tabletop width, plates and glassware compete for space. In that case, use narrower settings or a wider tabletop.
Yes. Benches can save space on one side while chairs remain on others. Update the seat-width assumption accordingly for a realistic capacity estimate.
Seating by Table Length (Rectangle)
Assumes seat width 24 in, chair depth 18 in, walkway 36 in, seating on sides and ends.
| Table (L × W) | Seats per long side | Seats per end | Total seats |
|---|---|---|---|
| 60 × 36 in | 2 | 1 | 6 |
| 72 × 36 in | 3 | 1 | 8 |
| 84 × 42 in | 3 | 1 | 8 |
| 96 × 42 in | 4 | 1 | 10 |
| 108 × 42 in | 4 | 1 | 10 |
Seating by Diameter (Round)
Assumes seat width 24 in. Floor of circumference ÷ 24 in per person.
| Diameter | Circumference (in) | Seats (estimate) |
|---|---|---|
| Ø 42 in | ≈ 132 | 5 |
| Ø 48 in | ≈ 151 | 6 |
| Ø 54 in | ≈ 170 | 7 |
| Ø 60 in | ≈ 189 | 7 |
| Ø 72 in | ≈ 226 | 9 |
Minimum Room Size for Common Tables
Formula: Required = Table size + 2 × (ChairDepth + Walkway). Here with 18 in chair depth and 36 in walkway.
| Table | Required room (L × W or Ø) |
|---|---|
| 60 × 36 in (rect.) | 168 × 144 in |
| 72 × 36 in (rect.) | 180 × 144 in |
| 84 × 42 in (rect.) | 192 × 150 in |
| 96 × 42 in (rect.) | 204 × 150 in |
| 108 × 42 in (rect.) | 216 × 150 in |
| Ø 42 in (round) | Ø 150 in |
| Ø 48 in (round) | Ø 156 in |
| Ø 54 in (round) | Ø 162 in |
| Ø 60 in (round) | Ø 168 in |
| Ø 72 in (round) | Ø 180 in |
Comfort Range Cheatsheet
Typical planning values used by the calculator and many designers.
| Parameter | Typical range | Notes |
|---|---|---|
| Seat width per person | 22–26 in | 26–30 in for armchairs |
| Chair depth at table | 16–20 in | Includes back thickness |
| Walkway behind chairs | 36–48 in | 32 in workable in tight rooms |
| Place setting depth | 16–20 in | 18 in is a common assumption |
| Table height | 28–31 in | 30 in is most common |