Projector Viewing Distance Calculator

Screen Size
Throw Distance
Viewing Distance
Brightness / Lumens
DIY Screen
Ceiling Mount

Use this after buying or building a screen when you want to know where to place seating for comfortable viewing without eye strain.

How to use: Enter your screen diagonal in inches and aspect ratio, then click Calculate. THX distance is closer and more immersive; SMPTE is farther and more relaxed — aim between the two.

Projector Viewing Distance Calculator

Enter your screen size to find the optimal seating distance (SMPTE or THX).

Screen diagonal (Inches)

Aspect ratio

16:9 4:3 21:9

Preview

Recommended viewing distance will appear here.

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Google TV 4K Smart Projector – 1500 ANSI, Auto Focus, Dolby Audio, WiFi 6, Bluetooth 5.2$263.99
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