Projector Screen Size Calculator

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

Use this tool when you know how far you sit from the screen and want to find the ideal width and height — so movies and games feel immersive without overwhelming the room.

How to use: Measure the distance from your sofa to the wall, pick a room preset or type the distance, choose 16:9 (or your content ratio), select SMPTE for a balanced view or THX for a more cinematic feel, then click Calculate.

Projector Screen Size Calculator

Enter viewing distance and aspect ratio to find the ideal screen size (SMPTE or THX).

Room preset

Viewing distance

Meters Feet

Aspect ratio

16:9 4:3 21:9

Viewing standard

SMPTE (30°) THX (36°)

Preview

16:9

Your screen dimensions will appear here.

HAPPRUN projectors for your setup

4K Home Projector with WiFi 6 and Bluetooth 5.2 (300 , 1500 ANSI)$254.98
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Smart Projector – Netflix Licensed, 1500 ANSI, Auto Focus, WiFi 6, Bluetooth 5.2$99.00
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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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