Introduction
The LED Wall Size Calculator computes the physical dimensions, total pixel resolution, minimum comfortable viewing distance, safe camera-to-wall distance for moire prevention, and estimated power draw for an LED wall built from a specific panel model. Select from common VP-grade panels including the ROE Black Pearl BP2, Absen PL2.5, and Unilumin Ustorm II, then enter panel count wide and high to see physical width and height in metres and feet, total pixel resolution, pixel pitch, minimum viewing distance, safe camera distance, brightness in nits, and estimated power draw in kilowatts.
What This Tool Calculates
Virtual production using LED walls requires careful pre-production calculation to ensure the wall is large enough to fill the camera frame at the planned shooting distance, that the pixel pitch is fine enough to avoid visible pixel structure at the working distance, and that total power draw can be supplied by the stage's electrical infrastructure. Getting these calculations wrong before the build means a wall too small for intended shots or moire banding in the captured image. Understanding these relationships in pre-production saves significant cost and prevents on-set surprises during an expensive VP shoot day.
The Formula and How It Works
Pixel pitch is the distance in millimetres from the center of one LED pixel to the center of the adjacent pixel. Finer pitch (lower number) means higher pixel density, closer viewing capability, and higher panel cost. Minimum comfortable viewing distance for humans is approximately pitch (mm) x 500, converted to metres. Safe camera distance to prevent moire patterns is approximately pitch (mm) x 0.8 metres. A 2.84mm pitch wall has a minimum human viewing distance of 1.4 m and a safe camera distance of approximately 2.3 m. Shooting closer requires stopping down the lens or using a Brompton or Megapixel HELIOS processor with camera-synchronized GenLock.
Real-World Examples
Sizing an LED Wall for a Feature Film Scene
A cinematographer planning an interior scene on an ARRI Alexa 35 with a 35mm lens shooting from 3 metres to the subject needs background coverage that fills the camera frame. The horizontal FOV at 35mm on the Alexa 35 sensor is approximately 43 degrees. At 4.5 metres total camera-to-wall distance, the background coverage width required is approximately 3.7 metres. Eight panels wide using 500mm panels gives a 4-metre wall, providing the necessary coverage with margin. Four panels high gives 2 metres of coverage, sufficient for a standard room interior at that focal length and camera height.
Common VP Panel Specifications
| Detail | Value |
|---|---|
| The ROE Black Pearl BP2 at 2.84mm pitch with 500 x 500mm physical panel size is one of the most widely used VP panels globally, rated at approximately 800 nits peak brightness. | |
| The Absen PL2.5 at 2.5mm pitch offers finer resolution for close camera work. | |
| For large stages where cameras are 6 metres or more from the wall, 3.9mm pitch panels such as the Unilumin Ustorm II are more cost-effective. | |
| Fine pitch panels below 2mm are used for EDIT ceiling panels directly above talent where camera distance is minimal. | |
| Common processors include Brompton Tessera SX40 and Megapixel HELIOS for frame sync, color calibration, and camera phase alignment.. |
Pro Tips and Common Mistakes
Pro Tips
- Plan the LED wall configuration with the DOP and VP supervisor in pre-production using this calculator before locking any stage booking.
- Always budget for an LED wall color calibration session before principal photography: measuring and profiling every panel module costs $800 to $2,000 but dramatically improves color accuracy across the wall.
- Coordinate with the electrical department on power draw before the tech scout since a large VP wall can draw 20 to 80 kW, requiring dedicated three-phase circuits.
- Ensure the processor supports GenLock synchronized to the camera sensor scan frequency to eliminate shutter banding..
Common Mistakes
- The most common mistake is sizing the wall only for the primary shooting lens without accounting for wider lenses used for establishing shots or camera moves.
- A wall sized for a 35mm lens is typically too small for a 24mm lens at the same camera position.
- A second error is wall height that does not extend above practical set elements, causing visible panel edges above the set ceiling line.
Frequently Asked Questions
What pixel pitch is best for virtual production?
For most VP applications with cameras 3 to 6 metres from the wall, 2.6mm to 2.84mm pitch represents the best balance of resolution, brightness, and cost. For extreme close-up work or EDIT ceiling panels, 1.5mm to 1.9mm pitch is recommended. For large stages with cameras 8 metres or more from the wall, 3.9mm pitch is adequate and significantly more cost-effective.
What is GenLock and why does it matter for LED walls?
GenLock synchronizes the LED wall refresh cycle to the camera sensor's scan frequency. Without it, the camera captures the LED wall at different phases of its refresh cycle from frame to frame, producing visible banding or flickering in the recorded image. All professional VP setups require GenLock-capable processors.
How much power does a VP LED wall consume?
Typical VP-grade panels consume 400 to 800 watts per square metre at full brightness. A 4 x 4 metre wall draws approximately 6 to 13 kW. A 10 x 5 metre stage wall draws 20 to 40 kW, requiring dedicated three-phase electrical supply separate from other stage loads.
Start Calculating
Use the calculator above to run your numbers before your next production.
