Outils pratiques pour un travail de précision
Planificateur de Places à Table & Dégagement de Pièce
Visualisez combien de places tiennent autour d'une table et si la table et les chaises s'intègrent dans votre pièce.
added per seat for everyday dining
added per seat for occasional/holiday seating
space needed behind a chair to sit down and stand up
How it works
How to use it: enter your room size, table shape and dimensions, and your chair width. The tool gives two seat counts - a comfortable everyday spacing and a tighter spacing for occasional extra guests - plus whether the table and its pull-back clearance actually fit your room.
Formula. Each seat needs a "pitch" along the table edge - chair width plus elbow room: pitch = chair width + elbow room. For a rectangular table, seats = 2 × floor(table length ÷ pitch) + end seats (two end seats are counted only when the table is wide enough, roughly 700 mm+, to seat someone comfortably at each end). For a round table, seats = floor(π × diameter ÷ pitch), since the seating positions wrap around the circumference. Required room size is the table's footprint plus pull-back clearance on every side.
Worked example. With the defaults (rectangular, 2000 × 1000 mm table, 450 mm chairs): comfortable pitch = 450 + 150 = 600 mm → 2 × floor(2000 ÷ 600) + 2 = 2×3+2 = 8 comfortable seats. Tight pitch = 450 + 50 = 500 mm → 2 × floor(2000 ÷ 500) + 2 = 2×4+2 = 10 tight seats. Required room = (1000 + 2×900) × (2000 + 2×900) = 2800 × 3800 mm, which fits inside the default 3600 × 4200 mm room with margin to spare.
Limitations
Elbow-room and pull-back figures are commonly cited planning guidelines, not a universal standard - actual comfortable spacing depends on chair style, place-setting size, and personal preference. Treat both seat counts as planning estimates, and mock up the layout with tape on the floor before buying furniture for a tight room.
This does not account for door swings, walkways to other furniture, a table leaf/extension mechanism, bench seating (which fits differently than individual chairs), or a non-rectangular room shape.
Frequently asked questions
Why does a round table sometimes seat more than a similarly-sized rectangular one?
A circle's full circumference is usable for seating with no wasted corners, while a rectangular table's corners are typically unused space between the long-side seats and the end seats. For the same footprint, round tables often seat comparably or better.
How much pull-back clearance do I actually need?
A commonly cited comfortable figure is around 900 mm (about 3 ft) behind a chair so someone can push back and stand without bumping a wall or another chair; tighter rooms sometimes work with less, but sitting down and standing up gets awkward. Measure your actual chair's pulled-back depth if you have one.
What if my room is too tight?
Try a smaller table, a round table (often more space-efficient for the same seat count), fewer seats, or bench seating along one side, which typically needs less pull-back clearance than individual chairs.
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