BenQ W4100i: throw distance & specs
4K UHD · 3,200 lumens · throw ratio 1.15–1.5. For a 100″ screen it sits 8.4–10.9 ft away.
The BenQ W4100i sits 8.4–10.9 ft from a 100″ screen and about 10.0–13.1 ft from a 120″ screen, set by its official 1.15–1.5 throw ratio. At 3,200 lumens it pairs best with a matte-white screen in the dark, or an ALR screen with some ambient light.
Throw ratio
1.15–1.5
Brightness
3,200 lumens
Resolution
4K UHD
Type
LED
| Throw ratio | 1.15–1.5 |
| Brightness | 3,200 lumens |
| Resolution | 4K UHD |
| HDR | Yes |
| Light source | LED |
| Type | Standard throw |
| Input lag | 17.9 ms |
| Price | ~$2,799 |
Throw-distance calculator
BenQ W4100i — distance for a 100″ screen
8.4–10.9 ft
Lens-to-screen distance. Zoom (if any) lets you fine-tune within the range.
Throw distance by screen size
How far the BenQ W4100i sits from the screen at common 16:9 sizes, across its full zoom range.
| Screen (16:9) | Image width | Throw distance |
|---|---|---|
| 90″ | 78″ | 7.5–9.8 ft |
| 100″ | 87″ | 8.4–10.9 ft |
| 120″ | 105″ | 10.0–13.1 ft |
| 150″ | 131″ | 12.5–16.3 ft |
Every projector’s throw distance, by screen size: 100-inch screen · 120-inch screen
Which screen for the BenQ W4100i?
The BenQ W4100i is a standard-throw projector, so it works with a matte-white screen in a dark room or an ALR screen if you watch with some ambient light. Match the screen size to the throw distance the calculator gives for your room.
Frequently asked questions
Compare with
Guides for this projector
How to calculate projector throw distance
Throw distance = image width × throw ratio. First convert the screen diagonal to width (for 16:9, width = diagonal × 0.872), then multiply by the projector's throw ratio. For a 100-inch screen (87 inches wide) and a 1.5 throw ratio: 87 × 1.5 = 131 inches, about 11 feet.
GuidesANSI vs ISO vs LED lumens
ANSI and ISO 21118 lumens are measured the same trustworthy way (averaged across the image) and are roughly equal. CVIA is a reliable newer standard. "LED lumens" and vague "marketing lumens" are inflated — often 2 to 3 times the real ANSI figure. Always size brightness by the ANSI or ISO number.
GuidesProjector vs TV
A projector wins on sheer size and cost-per-inch — 100 to 200 inches for the price of a much smaller TV — but needs controlled light or an ALR screen. A TV wins on brightness, convenience and lifespan. For movie nights on a big screen, choose a projector; for all-day bright-room viewing, choose a TV.
Not sure it fits? Run your exact screen size through the calculator.
Back to top →Updated