The 30-Degree Rule: A Simple Formula for TV Viewing Distance

The Society of Motion Picture and Television Engineers, or SMPTE, offers a simple guideline for home theater buyers: the 30-degree rule. The idea is that your seating position should create a 30-degree angle between your eyes and the edges of the screen. This angle, in turn, determines the ideal viewing distance for a given TV size.

For shoppers, the rule provides a quick reference when planning a living room or media room. Rather than guessing how far to sit from a new television, the 30-degree method ties the distance directly to the screen's dimensions. It is a practical starting point for balancing immersion with comfort.

Because the source focuses only on this rule, there are no conflicting recommendations to compare. The main takeaway is that SMPTE's approach gives consumers a simple, size-based formula to avoid sitting too close or too far from their display.