Exhibit Hall Size Calculator: How Much Space Do You Need for a Trade Show?
Enter the booths you plan to sell by size, your aisle widths and the registration, food, lounge, theater, service and storage areas on the floor. Get net booth square feet, aisle square feet, feature areas, the gross square feet of hall to book, net-to-gross efficiency and an example hall size.
Size Your Exhibit Hall
54,055 sq ft
Gross hall to book
For example a 290 x 190 ft clear hall (55,100 sq ft), with no columns.
23,400 sq ft
Net booth space
186 booths.
20,655 sq ft
Aisles and clearances
Includes 4,005 sq ft perimeter.
43.3%
Net to gross
53.1% before feature areas.
| Net booth space | 23,400 sq ft |
|---|---|
| Aisles | 16,650 sq ft |
| Perimeter allowance | 4,005 sq ft |
| Exhibit floor | 44,055 sq ft |
| Feature areas | 10,000 sq ft |
| Gross hall | 54,055 sq ft |
Already have a hall? Work the other way with the booth capacity calculator.
Planning estimate only. Every default is a planning assumption. The venue and the local fire marshal set aisle widths and exits; see trade show aisle widths and fire marshal floor plan requirements.
Square Feet per Booth Including Aisles
Each booth with its share of the aisles, before the perimeter allowance and feature areas.
| Booth | Count | Each | Each with aisles | Net total | Aisle total |
|---|---|---|---|---|---|
| 10x10 inline | 150 | 100 | 165 | 15,000 | 9,750 |
| 10x20 inline | 30 | 200 | 330 | 6,000 | 3,900 |
| 20x20 island | 6 | 400 | 900 | 2,400 | 3,000 |
| 20x30 custom island | 0 | 600 | 1,200 | 0 | 0 |
How the Exhibit Hall Size Calculator Works
1. Count the booths you plan to sell
Enter booths by size. Their footprints added together are your net square feet, the space you actually sell. Not sure which sizes to offer? See our guide to trade show booth sizes.
2. Add each booth’s share of the aisles
Inline booths sit back to back in double rows, so each one carries half the aisle in front of it plus a slice of the cross aisles. An island booth is open on all four sides and carries aisle on every side, which is why islands use more floor per square foot sold.
3. Allow for walls, columns and exits
No hall is a clean grid. The perimeter allowance covers wall clearances, columns, exit paths and service doors. Or switch to a target net-to-gross efficiency if the venue can tell you what similar shows in the hall achieve.
4. Add the feature areas
Registration, the food court, lounges, a seminar theater, the show office and storage all take floor you can’t sell. Set any that sit outside the hall to 0.
5. Book the gross, then check it with the venue
The total is the gross square feet to ask for, with an example hall shape. Halls rent by the hall or section, so round up, and get the venue’s drawing and the fire marshal’s requirements before you sell booths. Our guide to planning a trade show covers the steps around it.
Square Feet per Booth at Common Aisle Widths
Each booth plus its share of the aisles, with a cross aisle of the same width every 100 ft, before walls, columns and feature areas. 10 ft aisles are common in US exhibit halls; the venue and the fire marshal set your minimum. Read more on trade show aisle widths.
| Booth | Booth only | 8 ft aisles | 10 ft aisles | 15 ft aisles |
|---|---|---|---|---|
| 10x10 inline | 100 | 151 | 165 | 201 |
| 10x20 inline | 200 | 302 | 330 | 403 |
| 20x20 island | 400 | 784 | 900 | 1,225 |
| 20x30 island | 600 | 1,064 | 1,200 | 1,575 |
Draw the Hall to Scale in Map D
Once you have a hall, check the estimate against the real room. With Map D’s event floor plan software you upload an image of the venue floor plan (PNG or JPG work best), calibrate the scale by clicking two points whose real distance you know, such as the ends of a wall, and lock the map scale so it isn’t changed by accident. Then draw booths, aisles and feature areas over the plan in imperial or metric units. A free floor plan account gives you the map editor for one event; publishing the floor plan needs a paid plan, from $1,500 per event, and selling booths online from it is part of our trade show management software, from $2,500 per event.
What this assumes
Every figure the calculator starts with, and where it comes from. Where the honest answer is that a number depends on your venue, it says so rather than inventing one.
- Booth mix
- Booth counts by size: 150 10x10 inline, 30 10x20 inline and 6 20x20 islands by default, with a custom size for anything else. Use your sales target or last year's floor plan, not a guess at the hall.
- Aisle widths
- 10 ft aisles between rows and across them are common planning practice in US exhibit halls, not a rule. Some shows get 8 ft; entrance and main aisles are often wider. The venue and the local fire marshal set the minimum for your show, so use their figure.
- How aisles are shared
- Inline booths are treated as back-to-back double rows, each booth carrying half the aisle in front of it, with a cross aisle cutting the rows every 100 ft by default. Islands have an aisle on all four sides. This is a planning model of a regular grid, not a drawn plan.
- Perimeter and column allowance
- A 10% allowance on booths plus aisles for wall clearances, columns, exit paths, service doors and odd corners. It is a placeholder; a hall with many columns or a ragged shape needs more.
- Feature areas
- Registration 2,000, food court 3,000, lounge or stage 1,500, seminar theater 2,500 (about 200 seats at 10 sq ft each plus a small stage), service desk 500 and on-floor storage 500 sq ft. Set any to 0 if it sits outside the hall.
- Net-to-gross efficiency
- If you know what similar shows in the hall achieve, switch to a target net-to-gross efficiency instead of aisle widths. The 60% default is a placeholder, not a benchmark; ask the venue or your general service contractor what their halls run at.
What it does not model
- Columns, ceiling heights, floor load limits, utility locations and loading doors in a specific hall. Walk the hall or get its drawing before you commit.
- Fire code. Exit widths, aisle minimums, fire lanes and occupant load are set by the local fire marshal and the code your jurisdiction has adopted; this calculator does not check any of them.
- Peninsula booths, irregular rows and wider main aisles at entrances. Model them with the custom booth or a higher perimeter allowance.
- Space outside the exhibit hall: meeting rooms, ballrooms, prefunction lobbies and marshalling yards.
- Price. Halls are usually rented by the whole hall or a section, not by the square foot you calculate, so round up to what the venue actually rents.
Estimate only, from the figures you entered. Not a quote. Last reviewed November 2026.
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Frequently asked questions
How much space do I need for a trade show?
Add the booth footprints, then the aisles, an allowance for walls and columns, and every feature area on the floor. At this calculator's defaults, 186 booths with 23,400 sq ft of booth space need about 54,055 sq ft of hall once 10 ft aisles, a 10% perimeter allowance and 10,000 sq ft of registration, food, lounge, theater, service and storage are added.
How many square feet per booth including aisles?
With 10 ft aisles and a cross aisle every 100 ft, a 10x10 inline booth takes about 165 sq ft including its share of the aisles, a 10x20 about 330 and a 20x20 island about 900, before walls, columns and feature areas. Wider aisles or more cross aisles raise those figures.
What is net to gross square feet in an exhibit hall?
Net square feet is the booth space you sell. Gross is the whole hall you book, including aisles, clearances and feature areas. Net divided by gross is the hall's efficiency; at this calculator's defaults it is 43.3% overall and 53.1% on the exhibit floor before feature areas. Your venue or general service contractor can tell you what similar shows in that hall achieve.
Is this the same as a booth capacity calculator?
Use this calculator when you know the booths you want to sell and need to know how much hall to book. If you already have a hall and want to know how many booths fit, use the booth capacity calculator, which starts from hall dimensions instead.
Can Map D draw my exhibit hall to scale?
Yes, once you have the hall. In Map D's map editor you upload an image of the venue floor plan (PNG or JPG work best), calibrate the scale by clicking two points whose real distance you know, and draw booths, aisles and areas over it in imperial or metric units. A free account gives you the map editor for one event; publishing the floor plan needs a paid plan from $1,500 per event, and selling booths online starts at $2,500 per event on Growth.
Sources
- Map D trade show aisle width guide: common aisle widths and who sets the minimum · checked 2026-11-09
- Map D fire marshal floor plan requirements: what a reviewer checks · checked 2026-11-09
- Map D help center: the free plan and how to upgrade · checked 2026-11-09
- Map D pricing · checked 2026-09-18