Projector Setup Tools
Free calculators to plan screen size, throw distance, brightness, DIY screens, and ceiling mounts — tailored for HAPPRUN projectors.
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Screen Size
Viewing distance → ideal screen width & height
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.
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Throw Distance
Screen size + throw ratio → projector placement
Use this when you already know the screen size you want and need to figure out where to place the projector — essential for shelf, table, or ceiling setups.
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Viewing Distance
Screen diagonal → optimal seat distance
Use this after buying or building a screen when you want to know where to place seating for comfortable viewing without eye strain.
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Brightness / Lumens
Screen + room light → required ANSI lumens
Use this to check whether your projector is bright enough for your screen size — especially important for living rooms with windows or outdoor movie nights.
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DIY Screen
Fabric & frame cut sizes for homemade screens
Use this before building a screen at home — it gives exact viewing area, fabric, and frame sizes so you order the right amount of material.
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Ceiling Mount
Lens height & drop from ceiling
Use this when planning a ceiling mount to see if the lens will align with your screen and whether you have enough drop from the ceiling.
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