Visible screen size vs. total screen size
“Screen size” can mean three different things, and mixing them up is the most common sizing mistake:
- Visible image size — the area the projected picture actually fills.
- Total screen size — the impact screen including borders, grommets, or a tensioning edge.
- Enclosure or frame size — the outside dimensions of everything that holds the screen.
Each layer adds a few inches. Carl’s Place suggests subtracting about 4–6 in from the available width and allowing at least 4 in above the screen (Carl’s Place aspect ratio guide). In a room with an 8 ft ceiling, that leaves a visible image somewhat under 8 ft tall once the frame and top clearance are counted.
Screen width and height
Height is usually the hard limit, because it is capped by the ceiling and by the enclosure frame. Width is the flexible dimension, and the aspect ratio decides how much of it you use. A taller image gives more sky for high shots and makes the scene feel larger; a wider image adds peripheral view but uses room width that you may need for side protection or a left-handed hitting position.
Enclosure depth
Freestanding enclosures need depth of their own. Foresight, for example, lists its Play 10′ frame at 5 ft 4 in of enclosure depth and 20 ft of full depth including the projector (Foresight Play 10′ GC3). A built-in screen wall uses less depth but still needs space behind the screen.
Aspect ratio: 16:9, 16:10, 4:3, and custom
The aspect ratio is width divided by height. At the same image height, a wider ratio needs a wider room. Carl’s Place describes 16:9 as suited to wide rooms, 4:3 as using less width for the same height and popular in narrow rooms, and 16:10 as sitting between them (Carl’s Place).
| Image height | 16:9 width | 16:10 width | 4:3 width |
|---|---|---|---|
| 7 ft | 12 ft 5 in | 11 ft 2 in | 9 ft 4 in |
| 8 ft | 14 ft 3 in | 12 ft 10 in | 10 ft 8 in |
| 9 ft | 16 ft | 14 ft 5 in | 12 ft |
Software, tablets, and image cropping
The ratio has to match what your software outputs. BenQ lists 16:9, 16:10, 4:3, and 1:1 as common simulator ratios and notes that tablet-driven apps may limit the image to about 4:3 (BenQ setup guide). If the software outputs 16:9 onto a 4:3 screen, the picture is either letterboxed (black bands, smaller image) or cropped at the sides. Most simulator projectors are native 16:9, so a 4:3 image uses only the middle of the projector’s frame — you get a narrower picture, and less of the projector’s light lands on the screen.
Custom ratios
Custom-size screens are available, and some software lets you set the output resolution to match. Before ordering a custom size, confirm three things: the software can output that ratio, the projector can fill it from your mounting position, and the screen maker’s tolerances for borders and tension.
Impact screen quality, tension, and wall offset
Impact-screen quality
Impact screens are layered fabrics designed to take a ball at full speed and display a projected image. Retail impact screens span roughly $200–$1,000 (Carl’s Place cost guide). Materials differ in how much they bounce the ball back, how loud they are, how visible the weave is up close, and how they handle ambient light. Some retailers offer gray or high-contrast surfaces intended for rooms that cannot be fully darkened.
Screen offset from the wall
The screen has to flex on impact without striking the wall behind it. Retail guidance suggests 12–16 in between screen and wall (Carl’s Place measuring guide), and one DIY kit recommends about 12 in at the rear (Carl’s Place DIY enclosure kit). Include this in your depth budget — it comes out of the screen-to-ball distance.
Screen tension
Bungee or tie tensioning keeps the surface flat for a clean image and controls how the screen moves on impact. Too loose and the image ripples and balls bounce unpredictably; too tight and more energy returns toward the golfer. Follow the screen maker’s tensioning guidance and recheck it after the first weeks of use.
Throw ratio, short throw, and ultra-short throw
Throw ratio links the projector’s distance from the screen to the image width it produces:
Throw distance = image width × throw ratio
A 0.8 throw ratio filling a 14 ft wide image sits about 11.2 ft from the screen — in BenQ’s example, typically 2–3 ft behind the hitting area (BenQ). BenQ gives a golf-simulator range of 0.5–1.1, with 0.69–0.89 typical for home simulators and about 0.5 for small rooms. ProjectorCentral defines the same ratio and offers a model-specific calculator (ProjectorCentral calculator).
Short throw vs. ultra-short throw
Short-throw projectors (roughly the 0.5–0.9 range used in simulators) can sit above the golfer and still fill a large screen. Ultra-short-throw designs sit very close to the screen, sometimes on the floor, and need special care: they are in the ball’s path, and any movement shows up as image distortion. Terminology varies between publishers, so compare the published ratio rather than the label.
When the image is not 16:9
For a native 16:9 projector showing a 4:3 image, the image height — not width — sets the distance. BenQ publishes an adjusted formula for this case (BenQ). It is equivalent to working out the full 16:9 frame the projector draws around the 4:3 picture: frame width = image height × 16/9, then multiply by the throw ratio. The calculator below does this when you tick the 4:3 option.
Throw-distance calculator
Throw distance = image width × throw ratio — planning math, not final model compatibility.
Throw distance is measured from the lens to the screen surface. Confirm the exact model with theProjectorCentral calculator orCarl’s Place screen size calculator, and check that the position is clear of the swing.
Ceiling mount, floor mount, shadows, and protection
Ceiling mount
BenQ calls ceiling mounting the most popular and easiest option, with a short-throw projector above and behind the hitting area to avoid shadows (BenQ mounting guide). Mounted that way, the beam passes over the golfer instead of through them.
Floor mount
Floor-mounted projectors sit in front of the golfer, usually need a very short throw of about 0.5, and can be struck by low shots (BenQ). They also usually need more keystone or geometry correction because the projector is pointing up at the screen. Consider a floor mount mainly when the ceiling cannot take a projector safely.
Shadows
A shadow appears whenever the golfer stands between the lens and the screen. BenQ notes that cart placement carries the highest shadow risk, especially when right- and left-handed golfers share the room (BenQ). A centered ceiling mount behind the hitting position usually keeps the golfer out of the beam for both hands.
Hitting-zone conflicts
The projector has to sit outside every club’s swing arc, including the follow-through of the tallest player. That usually means far enough behind the ball and high enough that a raised club cannot reach it. Overhead launch monitors also want ceiling space near the ball — plan both together so they do not compete for the same spot.
Projector protection
Balls that rebound off the screen, frame, or ceiling can reach the projector. A cage or protective housing, and a ceiling baffle or netting between the hitting area and the projector, reduce that risk. Protection does not replace correct placement.
Brightness, ambient light, and resolution
Brightness and ambient light
Brightness requirements depend on how dark the room can be made, the image size, and the screen material. A blacked-out basement needs far less light output than a garage with open windows. On the access date, the simulator-focused short-throw models in BenQ’s comparison table were rated between 3,000 and 6,000 lumens (BenQ model table). That is a description of the products offered, not a recommendation. Controlling light — blackout window coverings, dark wall and ceiling finishes, and lighting that can be dimmed or switched off near the screen — often improves the picture more than a brighter projector.
Projector resolution
1080p projectors are the common starting point for home simulators. 4K short-throw models are offered in several manufacturer kits; Uneekor’s builder, for example, offered 1080p and 4K short-throw projectors at different price points on the access date (Uneekor SimKit Builder). The planner uses these allowances:
| Tier | Description | Planning range |
|---|---|---|
| Standard 1080p | Entry short-throw 1080p projectors. | $700–$1,800 |
| High-brightness 1080p | Higher-brightness short-throw 1080p models offered in simulator kits. | $1,500–$2,600 |
| Premium 4K | 4K short-throw models offered in simulator kits and packages. | $2,900–$6,000 |
1080p vs. 4K: when 4K is worthwhile
4K costs more twice: once for the projector and again for a computer that can render the simulator at 4K. GSPro, for example, lists an RTX 3060-class graphics card as its 1080p minimum and an RTX 3080 or better for great 4K performance (GSPro system requirements). 4K is most likely to be worthwhile when the image is large, when people sit or stand close to the screen, when the software you use renders detailed 4K scenery, and when the PC budget can support it. In a smaller image viewed from the tee, a bright, well-aligned 1080p picture in a dark room is often hard to tell apart.
Cable routing and image alignment
Cable routing
A ceiling projector needs power at the mount and a video cable from the PC. Long HDMI runs may need an active or fiber-optic cable or an extender. Plan the route before the ceiling is finished, keep cables out of the hitting area and walkways, and use a licensed electrician for any new outlet or circuit.
Image alignment
Mount the projector square to the screen and centered on it where possible, then use zoom and lens shift if the model has them. Digital keystone correction fixes geometry but can soften the image. Align the image to the visible screen area, recheck after the screen is fully tensioned, and calibrate the launch monitor’s target line to the image.
Checklist
Screen and projector planning checklist
- Measure clear width and the lowest ceiling height at the screen wall, then subtract frame and border allowances to get the visible image size.
- Pick the aspect ratio your room supports, and confirm your software and launch-monitor app can output it.
- Leave 12–16 in between the impact screen and the wall behind it, or follow the enclosure maker’s figure.
- Calculate throw distance from image width and the projector’s published throw range; confirm with a model-specific calculator.
- Check that the projector position sits above and behind the hitting area and clear of every club in the swing.
- Plan projector protection, the power outlet, and the video cable route before you mount anything.
- Darken the room or plan for ambient light before choosing brightness.
- Confirm the PC can drive the resolution you choose at a smooth frame rate.
- Test a controlled full swing under the projector before final mounting.
The Cost Planner checks the screen against your room, flags aspect-ratio waste, and estimates throw distance for the projector tier you choose. For the room itself, see theroom size guide and the buildout guide.
Disclosure.Independent planning resource. We do not sell, manufacture, or install simulator equipment. Estimates and fit checks are preliminary guidance—not quotes, safety certifications, or compatibility guarantees. Confirm clearance, compatibility, electrical work, and pricing with current manufacturer specifications and qualified professionals.
Sources
- BenQ: measuring golf simulator screen size and projection distance
- BenQ: where to mount a golf simulator projector
- BenQ golf simulator setup guide
- Carl's Place: golf simulator screen size and aspect ratio guide
- Carl's Place: measuring your space for an indoor golf simulator
- Carl's Place screen size calculator
- Carl's Place DIY golf enclosure kit with impact screen
- ProjectorCentral Projection Calculator Pro
- Uneekor SimKit Builder
- Trackman professional home golf simulator packages
- Foresight SIM IN A BOX Play 10′ GC3 package
- Foresight Sports: complete golf simulator room setup guide
- Carl's Place: how much a golf simulator costs
- GSPro official site and pricing