How to Calculate LED Screen Resolution？

If you want a fast and practical way to calculate LED display resolution, just remember one core idea:
resolution = physical size ÷ pixel pitch. This works for both indoor and outdoor screens, whether you use modules or cabinets.

1. Core Formula (Most Important)

$\text{Horizontal Resolution} = \frac{\text{Screen Width (mm)}}{\text{Pixel Pitch (mm)}},\quad \text{Vertical Resolution} = \frac{\text{Screen Height (mm)}}{\text{Pixel Pitch (mm)}}$Horizontal Resolution=Pixel Pitch (mm)Screen Width (mm)​,Vertical Resolution=Pixel Pitch (mm)Screen Height (mm)​

Alternative (Module-Based Calculation)

• Horizontal resolution = pixels per module (width) × number of modules (horizontal)
• Vertical resolution = pixels per module (height) × number of modules (vertical)

2. Example Calculation (Most Common Case)

Given:

• Pixel pitch: P2.0 (2.0 mm)
• Screen width: 3840 mm
• Screen height: 1080 mm

Calculation:

• Width: 3840 ÷ 2 = 1920 pixels
• Height: 1080 ÷ 2 = 540 pixels

 Final resolution: 1920 × 540

3. Module-Based Calculation (More Precise)

This method is more accurate in real projects because LED screens are built from standard modules.

Common module specs (indoor fine-pitch)

• 320 × 160 mm module
  • P2.0 → 160 × 80 pixels
  • P1.86 → 172 × 86 pixels
• 256 × 128 mm module
  • P2.0 → 128 × 64 pixels

Example

If you use 160 × 80 pixel modules:

• 10 modules horizontally → 160 × 10 = 1600 pixels
• 3 modules vertically → 80 × 3 = 240 pixels

Final resolution: 1600 × 240

4. Reverse Calculation (Designing for 1080P)

Sometimes you start with a target resolution and need to calculate screen size.

For a 1920 × 1080 display:

P2.0

• Width = 1920 × 2 = 3840 mm
• Height = 1080 × 2 = 2160 mm
   Screen size ≈ 3.84 m × 2.16 m

P1.86

• Width ≈ 1920 × 1.86 = 3571 mm
• Height ≈ 1080 × 1.86 = 2009 mm
   Screen size ≈ 3.57 m × 2.01 m

5. Practical Rule (Very Important)

• If you know size + pitch → divide to get resolution
• If you know module pixels → multiply to get resolution
• Always ensure the final resolution is an integer

If you get decimals, your design is not aligned with module dimensions. In that case, adjust the screen size or module count slightly to match real hardware constraints.

Conclusion

In LED engineering, resolution is not arbitrary—it must match the physical structure of modules and cabinets. Once you apply these formulas, you can quickly verify whether a design is feasible, optimized, and pixel-perfect.