Theater Calculators
Pixel Pitch and Retina Distance Calculator
https://www.theatersizing.com/calculators/pixel-pitch-retina/
Estimate only — not a calibrated SPL meter, an acoustic report or an electrical design. Confirm with measurement.
Pixel Pitch and Retina Distance Calculator
At 1 arc-minute, a pixel subtends the classic “retina” limit. Closer than that distance, you can pick out pixels on a good night with good eyes.
Inputs
Results
- Image width
- 2.66m
- Pixel pitch
- 0.692mm
- 1′ retina distance
- 2.38m
Calculation method
Pitch = width / horizontal pixels. Retina distance = pitch / tan(1′).
Exact formula
p = W / N_h. d = p / tan(1/60 °). Limits: 20/20 on-axis, no contrast sensitivity, no moving image, no compression.
Frequently asked questions
Why 1 arc-minute?
It is the usual 20/20 resolution limit. Some people resolve finer; compression often hides it.
1080p on a 120-inch?
Raise the retina distance. If you sit closer than that, you will see structure.
Does this replace THX?
No. THX is immersion FOV. This is pixel visibility. Use both.
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