The short answer
Add at least 60 cm to every edge of the table so the chairs stay on the rug when pulled out. A 180 × 90 cm table needs a rug of about 300 × 210 cm, so choose 240 × 340 cm if the room allows, or 200 × 300 cm as a snug minimum. For a 120 cm round table, a 240 cm round or square rug works.
Try the Rug Size CalculatorWhy 60 cm on every side
When someone stands up, they push the chair back, and a pulled-out dining chair commonly needs around 60 cm behind the table edge. If the rug stops short of that, the back legs drop off the edge, and the chair tips or catches. That is the main reason a small rug under a dining table looks and feels wrong.
So the rug size is the table size plus 120 cm in each direction (60 cm per side). The rug calculator uses the same rule for dining rooms.
Worked examples
Measure the table at its widest and longest points, and add 120 cm to each. Then pick the nearest standard rug size that is at least that big. If the standard size falls just short, go up, not down.
- Table 180 × 90 cm (seats six): needs about 300 × 210 cm. A 200 × 300 cm rug leaves 55 cm at the sides, which is snug, and 240 × 340 cm leaves 75 cm, which is comfortable.
- Table 140 × 80 cm (seats four to six): needs about 260 × 200 cm. A 200 × 300 cm rug leaves 60 cm at the sides.
- Square table 90 × 90 cm: needs about 210 × 210 cm. A 200 × 200 cm rug is snug, and 240 × 240 cm is comfortable.
- Round table 120 cm across: needs about 240 cm across. A 240 cm round rug or a 240 × 240 cm square works.
Check the room as well
The rug must fit the room too. Allow a visible border of floor, ideally 20–45 cm, and leave a clear walking route behind the chairs: around 90 cm is commonly suggested if people need to pass behind seated diners.
If the room is too small for the full size, choose the larger of the two options that stays clear of doors, radiators and the walls. Tape out the rug and pull a chair out at each seat to check.
Choose a rug that suits dining
A flat weave or a low pile lets chairs slide without catching, and it is easier to clean after spills. Deep or shaggy pile traps crumbs, and the chair legs can sink into it.
Look for a durable, stain-resistant material, and a pattern that is forgiving of the occasional spill. A non-slip underlay stops the rug creeping when chairs are pushed back, and it keeps the edges flat so they do not trip anyone.
This guide is general information to help you plan, not professional advice. Check product instructions and your supplier's guidance before you buy, and ask a qualified professional about structural or safety-related work. See our terms of use.