Movie previews at theaters typically last between 10 to 20 minutes before the feature film begins, with an average around 15 to 20 minutes being common at major chains like AMC

. These previews usually consist of 5 to 8 trailers, each lasting about 1.5 to 3 minutes, sometimes accompanied by ads or promotional content for the theater

. The exact length can vary depending on several factors:

• Theater chain and type: Larger chains often have standardized preview lengths (~20 minutes), while smaller or independent theaters may have longer preview times, sometimes up to 25-33 minutes

• Movie type: Blockbusters and highly anticipated films often have longer preview segments to promote multiple upcoming releases

• Format: IMAX or 3D screenings might have additional or specialized trailers, potentially extending preview time

• Special events: Film festivals or special promotions can increase preview duration

In summary, expect about 15 to 20 minutes of previews before a typical movie, but this can range from around 10 minutes up to 30 minutes depending on the venue and occasion