BenQ W1700 Distance Calculator
Estimate the ideal throw distance, screen width, height, and brightness zone for the BenQ W1700 projector using its published throw ratio range of 1.47 to 1.76 and a 1.2x zoom lens. Switch between screen-first and room-first planning to size your theater with confidence.
- Native format16:9 UHD home cinema
- Throw ratio1.47 to 1.76
- Zoom1.2x optical
- Rated brightness2200 ANSI lumens
How to use a BenQ W1700 distance calculator correctly
The BenQ W1700 is one of the most searched entry-level 4K home theater projectors because it hits a practical balance between image sharpness, lamp brightness, and installation flexibility. The challenge is that even a good projector can look mediocre if the throw distance is wrong. A projector distance calculator solves that problem by translating screen size into lens placement, or by working backward from room depth to estimate what size image the projector can produce. For the W1700, that calculation centers on the published throw ratio range of 1.47 to 1.76. In simple terms, throw ratio is the relationship between image width and projector distance. Multiply the image width by the throw ratio, and you get the approximate lens-to-screen distance.
If you are planning a dedicated movie room, a multi-use living room, or a ceiling-mounted media setup, this calculator helps you answer several practical questions at once. How far back should the projector sit? What diagonal fits your wall at a given distance? How much zoom flexibility do you actually have? And will image brightness still be reasonable at your preferred screen size? Those are the installation decisions that determine whether the BenQ W1700 feels cinematic or compromised.
Why throw ratio matters for the W1700
The W1700 uses a relatively modest zoom range compared with premium installation models. That is not a problem if you plan carefully, but it means there is less room for placement mistakes. A projector with a broad zoom and extensive lens shift can compensate for awkward mounting positions. The BenQ W1700 is more straightforward. It expects your screen size and projector location to be aligned within a narrower band. That is exactly why a distance calculator is useful before you drill holes, buy a screen, or run power to a ceiling mount.
For a 16:9 image, screen width is the key dimension in the throw equation. Many buyers think in diagonals because manufacturers market screens that way, but projectors optically care about width. For example, a 120 inch 16:9 screen is about 104.6 inches wide. Using the W1700 throw ratio range, that width leads to a distance range of roughly 12.8 to 15.3 feet. That means if your room can only support 11.5 feet from lens to screen, a 120 inch image is not realistic with this projector unless you change screen size or mounting position.
Core projection statistics for planning
| Specification | BenQ W1700 value | Why it affects setup |
|---|---|---|
| Throw ratio | 1.47 to 1.76 | Defines the minimum and maximum lens distance for a given image width. |
| Zoom | 1.2x | Allows only moderate placement flexibility, so accurate planning is important. |
| Rated brightness | 2200 ANSI lumens | Helps estimate how bright the image may appear on different screen sizes and gains. |
| Typical screen size guidance | About 60 to 200 inches | Shows the broad supported range, although room light and seating distance decide what is optimal. |
| Native content focus | 16:9 home theater | Best matched to standard UHD and streaming video formats. |
Because the W1700 is commonly used for 16:9 cinema viewing, most people should keep the calculator on 16:9 unless they have a special presentation use case. The alternate aspect options are included because some rooms are repurposed for gaming, slides, or mixed media, but the projector is at its most natural in a standard widescreen theater layout.
Understanding the BenQ W1700 distance formula
The formula behind this tool is simple but important:
- Convert screen diagonal into screen width based on aspect ratio.
- Multiply that width by the minimum throw ratio to find the closest placement.
- Multiply that width by the maximum throw ratio to find the farthest placement.
- If room distance is known instead, divide distance by each throw ratio to find the possible image width range.
For 16:9 screens, the width is about 87.16 percent of the diagonal and the height is about 49.03 percent of the diagonal. That means a 100 inch screen is approximately 87.2 inches wide and 49.0 inches tall. Using the W1700 throw range, the projector lens should land at about 10.7 to 12.8 feet from the screen. These are the numbers that matter during installation, because they tell you whether a coffee table position, shelf placement, or ceiling mount location is feasible.
Reference distances for common 16:9 screen sizes
| Diagonal size | Image width | Min distance at 1.47 | Max distance at 1.76 |
|---|---|---|---|
| 80 inches | 69.7 inches | 8.54 ft | 10.22 ft |
| 100 inches | 87.2 inches | 10.68 ft | 12.77 ft |
| 120 inches | 104.6 inches | 12.81 ft | 15.33 ft |
| 135 inches | 117.7 inches | 14.41 ft | 17.25 ft |
| 150 inches | 130.7 inches | 16.01 ft | 19.16 ft |
These figures are especially useful when cross-checking room depth. If your room is 14 feet deep, you may think a 135 inch screen is possible, but the table shows that 135 inches would require at least about 14.41 feet at the wide end of the zoom, before considering mount offset, rear clearance, or the projector body itself. That is why many real-world installations end up one screen size smaller than buyers first expect.
How brightness interacts with distance and screen size
A distance calculator is not only about fitting the picture on the wall. It is also about preserving image quality. The BenQ W1700 is rated around 2200 ANSI lumens, but the perceived brightness on screen depends heavily on image area and screen gain. A very large screen spreads the same light output across more surface area, which reduces brightness. This does not mean large screens are bad. It simply means they demand better light control. If you use the calculator with a 1.0 gain screen and a large diagonal in a bright living room, your image may look less punchy than expected during daytime viewing.
That is why this calculator includes a basic foot-lambert estimate. Foot-lamberts measure approximate reflected brightness on the screen. Home theater enthusiasts often use this value as a rough planning benchmark. Real output varies by lamp mode, color settings, zoom position, lamp age, and calibration, but the estimate is still useful for comparing screen sizes. If you are targeting a cinematic dark-room experience, moderate screen sizes usually provide a more balanced result with the W1700 than pushing to the largest screen your wall can physically hold.
Practical brightness tips
- Use blackout curtains or control ambient light if your screen is over 120 inches.
- Choose a reasonable gain screen if your room has light-colored reflective surfaces.
- Remember that eco and low-lamp modes reduce brightness, even if they improve noise and lamp life.
- If your image looks washed out, the issue may be room light, not projector placement.
Room-first planning versus screen-first planning
There are two smart ways to set up the BenQ W1700. The first is screen-first planning, where you already know the screen size you want. In that case, the calculator gives you the minimum and maximum throw distance, plus image dimensions and a brightness estimate. This is ideal for buyers who have already purchased a 100 inch or 120 inch ALR or white screen and need to find the mount position.
The second is room-first planning, where the room decides the system. Maybe your ceiling joist, shelf depth, or rear wall forces the projector to sit at a fixed distance. In that case, the calculator works backward and shows the approximate minimum and maximum diagonal the W1700 can produce at that location. This approach is often better in apartments, mixed-use family rooms, and retrofit installations where you cannot freely relocate power and mounting hardware.
Common installation mistakes to avoid
- Using throw distance from the wall instead of the lens. The optical reference point is the lens, not the back panel.
- Ignoring zoom limits. A projector may create the right image size only at one end of the zoom range, leaving little adjustment margin.
- Buying an oversized screen. Bigger is not always better if brightness, seating, and room depth do not support it.
- Forgetting vertical placement. Throw distance tells you how far back the projector goes, but mounting height and offset still matter.
- Planning around ideal lamp output only. Real brightness falls as the lamp ages, so leave yourself some headroom.
Best screen sizes for typical W1700 owners
In real homes, the sweet spot for the BenQ W1700 is usually around 90 to 120 inches in a controlled-light environment. At that size, the projector can still deliver a satisfying sense of scale while preserving acceptable brightness and manageable placement distances. A 100 inch screen fits many living rooms and spare bedrooms because the throw requirement is a little under 11 to nearly 13 feet. A 120 inch setup feels more cinematic, but it asks for roughly 12.8 to 15.3 feet from lens to screen, which rules out shorter rooms.
If you are unsure, err slightly smaller rather than larger. A well-contrasted, brighter 100 inch image often looks more premium than a dim, oversized 135 inch picture. Seating distance also matters. Since the W1700 targets 4K content, viewers often sit closer than they would with an older 1080p model. You can review general 4K consumer guidance from the FCC, ambient lighting advice from the U.S. Department of Energy, and broader screen viewing ergonomics from Harvard University Environmental Health and Safety. Those resources are not projector-specific installation manuals, but they are useful for understanding how resolution, room light, and viewing distance influence comfort and image perception.
What the calculator output means
When you click the calculate button above, the tool returns a setup summary tailored to your input mode. In screen mode, you will see the recommended throw distance range, the physical width and height of the image, and an estimated foot-lambert brightness figure. In room mode, you will see the approximate screen diagonal range your room can support, along with the corresponding widths and heights. The chart below the result visualizes the W1700 throw envelope across common screen sizes so you can instantly compare your target against typical installation points.
The numbers are intended for planning, not precision engineering. Real-world projector placement should also account for mount extension, rear airflow clearance, keystone avoidance, lens offset, and whether the screen frame or wall trim reduces usable image area. Still, for most homeowners, this calculator gets you very close to the correct range before installation day. That saves time, reduces return risk, and helps you choose the right screen with fewer surprises.