The two numbers that decide your conference table are how many people need to sit at it and how much room you have to walk around it. This guide gives you both — a size chart, the clearance math, and a calculator that works backwards from the room you already have.

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Most conference tables get chosen on length alone, and that’s where it goes wrong. A 12-foot table sounds generous until it arrives and nobody can get past the chairs to reach the far seat. The table isn’t the problem — the clearance around it is.

So work in this order: seats first, then clearance, then length. Here’s how each one works.

The rule: 30 inches of table edge per person

Each person needs roughly 30 inches of linear table edge to sit comfortably — enough for a laptop, a notepad, a coffee, and elbows that don’t collide. You can compress to 24 inches when you need to seat a crowd for a quarterly all-hands, but nobody wants to spend three hours there.

On top of the seats along the sides, a table 42 inches wide or more can seat one person at each end. Most of our conference tables are 48 inches across at the widest point, so both ends count. (The one exception: the 8-foot Classic Series boat-shaped top is 44 inches across — still wide enough for end seating.)

Conference table size chart

Drop the two end seats — common on racetrack tables with a rounded end against a screen wall — and subtract 2 from both seating columns.

Why 12 feet and 10 feet both show 10 seats

Because 144 inches divided by 30 lands at 4.8 seats per side, and you can’t seat 0.8 of a person. In practice a 12-foot table seats 12 comfortably if you tighten to about 28 inches each — which most people won’t notice. Treat the chart as the conservative number and add a pair if your chairs are narrow.

Clearance: the number that actually sizes your room

Clearance is the gap between the table edge and the nearest wall or obstruction. It has to absorb the chair, the person in it, and anyone walking behind them.

• 36 inches — the absolute minimum. A seated person can push back and stand, but nobody walks behind them while they’re seated. Fine for a wall the room doesn’t circulate along.
• 48 inches — the recommended figure. Someone can walk behind a seated colleague without the “excuse me” shuffle. Use this on at least two sides.
• 60 inches — what you need where there’s a credenza, a coffee station, or a door swinging into the room.

Add clearance to both sides of the table and you have your minimum room. A 12-foot table at 48 inches all round needs a room 20 feet by 12 feet — 240 square feet. That surprises most people, and it’s the number worth checking before anything else.

Work backwards from the room you have

Most of the time the room is fixed and the table is the variable. Enter your room dimensions and this will tell you the longest table that fits.

Shape changes the seat count too

Length sets the capacity, but shape decides how the room feels and whether people can see each other. We covered this in detail in how to choose the right conference table shape for your room — the short version:

• Boat-shaped — widest in the middle, tapering to flat ends. The taper improves sightlines down the table, which matters most at 12 feet and up. Our most popular shape for boardrooms.
• Racetrack — rectangular with rounded ends. Slightly more usable surface than a boat top and easier to walk around. Good general-purpose choice.
• Rectangular / square-top — maximum surface per foot, best for training and working sessions where people spread out.
• Round — best under 6 feet and for 4–6 people. Everyone is equidistant, so no one sits at “the head.”

Power and data

A conference table without power is a conference table with an extension cord running across the floor. Grommets come standard on our conference tables, so power modules can be added at any point — but it’s worth thinking about how the room will be used while you’re planning.

A useful rule: one power position per four seats, spaced evenly down the centre line. Grommets and covers are included with our conference tables, so the surface is ready for a power module whenever you want to add one. (On the Arena range, grommets come with every size except the 4-foot and 6-foot.)

Which of our tables comes in your size

Need something longer? The Classic Series boat-shaped top is available in 22-foot and 24-foot lengths on request — ask a sales rep.

Five things worth checking before you order

1. Measure the room wall to wall, not the space you imagine the table sitting in. Note the door swing and where it lands.
2. Check the delivery path, not just the room. A 12-foot top does not go round a tight corridor corner or into a small elevator. Measure the narrowest point between the loading dock and the room.
3. Count the chairs you already own and measure one. Chairs with fixed arms need more linear inches than the 30-inch rule assumes.
4. Consider your power requirements. Think about how many people will plug in and where they’ll sit. Grommets are included, so power modules can be added now or later.
5. Think about storage. Most meeting rooms end up needing somewhere to put coffee, office supplies, or AV equipment. A credenza or storage cabinet along one wall handles all three — just allow 60 inches of clearance on that side rather than 48.

Frequently asked questions