Projector Throw Distance Calculator
Find exactly how far back to mount your projector so it fills your golf impact screen. Enter your screen width and the projector throw ratio.
Find this on the projector spec sheet. Short-throw is usually 0.5 to 0.8. If it lists a range, run it twice for min and max.
Mount the projector about
from the screen to fill it edge to edge.
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Why Throw Ratio Matters for Golf Sims
Throw ratio is the relationship between how far a projector sits from the screen and how wide an image it produces. A low number means short-throw: the projector can fill a wide screen from close up. That is exactly what a golf simulator needs, because you want to mount the projector on the ceiling behind or above the hitter, out of the swing path and clear of shadows. The formula is simple: throw distance equals throw ratio times image width. Get your screen width, grab the throw ratio off the spec sheet, and you know precisely where the projector has to live.
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Frequently Asked Questions
How do you calculate projector throw distance?
Multiply the projector throw ratio by the image width. Throw distance = throw ratio x image width. For example, a projector with a 0.8 throw ratio displaying a 10-foot-wide image needs to sit about 8 feet from the screen (0.8 x 10 = 8). Throw ratio is printed on the projector spec sheet, often as a range like 0.5 to 0.7 for short-throw models, so you get a minimum and maximum mounting distance.
What throw ratio is best for a golf simulator?
Short-throw projectors with a throw ratio around 0.5 to 0.8 are ideal for most golf simulators. They let you fill a wide impact screen from a ceiling mount that sits behind or above the hitter, which keeps the projector out of the swing path and reduces shadows. A standard or long-throw projector would have to sit so far back that you would walk through the beam and cast a shadow on every swing.
Where should you mount a golf simulator projector?
Most golfers ceiling-mount the projector behind the hitting position, angled down at the screen, or floor-mount it well back and to the side. The goal is to keep the projector out of the swing zone and avoid your body blocking the image. Use the calculated throw distance to confirm the mount point clears your backswing and that a short-throw lens can fill your screen width from that spot.
Do you need a 4K projector for a golf simulator?
No, a good 1080p short-throw projector looks great on a golf impact screen and is what most builds use. 4K adds sharpness that is nice on a large screen but is not required for an excellent experience. Brightness (lumens) and a short throw ratio usually matter more than 4K for a golf sim, since you want a bright, evenly lit image from a close mount.