Pixel Pitch Selection for Outdoor LED Billboards (P6–P16): Sizing, Viewing Distance & Cost

P6 is commonly the practical sweet spot for fixed urban billboards with minimum viewing distances around 20 m. Use the industry 50× rule to convert between pixel pitch and minimum comfortable viewing distance and then apply the result to your site type and audience speed. Key Rule (50× Formula) Industry formula: minimum comfortable viewing distance (cm) = 50 × pixel pitch (mm). Rearranged: Minimum viewing distance (m) ≈ pixel pitch (mm) × 0.5 Equivalent selection rule: maximum pitch (mm) ≈ minim