LED Wall Resolution Calculator
Enter the size of an LED wall and its pixel pitch to get the number of pixels across and down. You can also enter a resolution and a pitch to find the size.
How the calculation works
An LED wall is made of small LEDs (pixels) placed at a regular spacing. This spacing is the pixel pitch: the distance from the center of one pixel to the center of the next.
- Pixels across = screen width ÷ pixel pitch
- Pixels down = screen height ÷ pixel pitch
- Screen width = pixels across × pixel pitch (the height works the same way)
A smaller pitch puts more pixels on a screen of the same size, so the picture is finer. The sizes you enter in feet or inches are converted to millimeters with the exact definitions (1 in = 25.4 mm, 1 ft = 304.8 mm) before they are divided by the pitch.
When the size is not a whole multiple of the pitch
Dividing a size by the pixel pitch often does not give a whole number. A wall can only have a whole number of pixels, so the fraction is not counted as a pixel: the result is rounded down to a whole number.
For example, a wall 12 ft wide and 6.75 ft high with a pitch of 3.9 mm:
| Division (calculated value) | Pixels that fit (rounded down) | Actual length | Leftover | |
|---|---|---|---|---|
| Across | 937.8462 | 937 | 3,654.3 mm | 3.3 mm |
| Down | 527.5385 | 527 | 2,055.3 mm | 2.1 mm |
The resolution is 937 × 527 px. The calculated value (937.8462) is only the result of the division; the fractional pixel does not exist. The leftover is the part of the screen size that is too short to hold another pixel.
Examples
- 3.84 m × 2.16 m, pitch 2.5 mm → 1,536 × 864 px (divides exactly)
- 1,920 × 1,080 px, pitch 2.5 mm → 4.8 m × 2.7 m (16:9)
- 1,920 × 1,080 px, pitch 3.9 mm → 7.488 m × 4.212 m (about 24.57 ft × 13.82 ft)
Theory versus real products
The result is a theoretical value from the size and the pixel pitch only. A real LED wall has these limits:
- It is assembled from cabinets (boxes holding the LED panels). The real size of the wall is a whole number of cabinets. This calculator does not work out the cabinet layout or how the edges are handled.
- A size worked out from a resolution cannot always be built either. A size that fits 1,920 × 1,080 px exactly may not be possible with the cabinet size you use.
- Use the actual pitch of the product, from the manufacturer's specification.
- It does not cover video standards, such as how 1920×1080 relates to a particular wall, or the scaling done by the video processor.
Notes
- The pixel pitch must be greater than 0 and at most 1,000 mm. It can have decimals. The size must be greater than 0 and can have decimals (up to 12 digits before the decimal point and 6 decimal places).
- You can enter the size in m, cm, mm, ft or in. The pitch is always in millimeters.
- If the screen is smaller than the pixel pitch, not even one pixel fits, and the calculator reports an error.
- The width ÷ height ratio is taken from the pixel counts. If it is within 1% of a common ratio such as 16:9, the common ratio is shown with "about" as an approximation.
- To work out an aspect ratio, see the Aspect Ratio Calculator. To convert a screen's diagonal size in inches, see the Screen Size Calculator.
Frequently asked questions
How do I work out the resolution from the size and the pitch?
Divide the size by the pitch. A width of 3.84 m (3,840 mm) with a 2.5 mm pitch gives 3,840 ÷ 2.5 = 1,536 pixels.
What happens when the division is not a whole number?
The fraction is rounded down and only the whole number is counted as pixels. The calculator also shows the result of the division on a separate line.
How wide must a wall be for 1920×1080 pixels?
Choose "Size from resolution and pitch" and enter 1920, 1080 and the pitch. At a pitch of 2.5 mm the answer is 4.8 m × 2.7 m. A real wall is a whole number of cabinets, so check the cabinet size as well.
Can I calculate with a pitch named "P2.6" as 2.6 mm?
The product name and the real pitch can differ a little. Use the value in the manufacturer's specification sheet.