Tool
Viewing Distance Calculator
Based on THX and SMPTE angle recommendations. Enter your screen size and resolution — the calculator updates as you type. Room depth is optional but improves the output.
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Optimal viewing distance
Minimum
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Maximum
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How the calculation works. Optimal distance uses the THX reference angle of 40 degrees, which places the screen's width at a subtended angle that matches professional reference conditions. Minimum distance is the SMPTE 30-degree threshold below which resolution benefit begins. Maximum distance is where the specified resolution provides no perceivable advantage over a lower resolution display at that distance. All distances are from the viewer's eye position to the screen surface.