Grand Ballroom at The Westin O'Hare

Grand Ballroom is 45.4 x 24.7 m (149 x 81 ft), 1,121 m² (12,071 sq ft), with a 7 m (23 ft) ceiling.

Plan view

LED wall that fits

Under a 7 m ceiling with 1.5 m trim and 0.3 m clearance you get 10 rows of 500 mm tile flown. Along the 45.4 m wall a Absen A2 Pro wall runs 72 x 10 (12096 x 1680 px, 7,200 kg, 133.2 kW).

Wall sizing assumes 1.5 m trim to the bottom edge, 0.3 m clearance under the ceiling, and a wall no wider than 80% of the longest wall. Weight and power are tile totals from the panel spec sheet; add processing, rigging, and cable.

Seating estimate

After a 12 x 7 m stage, Grand Ballroom holds about 2,305 theater seats, 943 banquet seats at rounds of 10, or 648 classroom seats. Back row in theater is roughly 38.4 m from the downstage edge; the previz checks whether the bottom of the wall clears the heads in front.

Other rooms at The Westin O'Hare

• Grand Ballroom Salon AB31.1 x 24.7 m (102 x 81 ft) · 7 m ceiling
• Grand Ballroom Salon BC27.7 x 24.7 m (91 x 81 ft) · 7 m ceiling
• LaSalle Ballroom28 x 18 m (92 x 59 ft) · 4 m ceiling
• Grand Ballroom Salon A17.7 x 24.7 m (58 x 81 ft) · 7 m ceiling
• Grand Ballroom Salon C14.3 x 24.7 m (47 x 81 ft) · 7 m ceiling
• LaSalle Salon BC18.9 x 18 m (62 x 59 ft) · 4 m ceiling
• Michigan Ballroom17.7 x 19.2 m (58 x 63 ft) · 3.7 m ceiling
• Executive Forum18.3 x 18.3 m (60 x 60 ft) · 3.1 m ceiling
• Grand Ballroom Salon B13.4 x 24.7 m (44 x 81 ft) · 7 m ceiling
• LaSalle Salon AB18.3 x 18 m (60 x 59 ft) · 4 m ceiling
• Lakeshore Room14 x 15.5 m (46 x 51 ft) · 3 m ceiling
• Director's A / B20.7 x 9.1 m (68 x 30 ft) · 3 m ceiling

Published dimensions (source), fetched 2026-09-05. All rooms at The Westin O'Hare · Venues in Rosemont