What is the official throw ratio of the Optoma HD146X?

The manufacturer-published throw ratio of the Optoma HD146X is 1.47–1.62. Multiply your image width by that figure to get the exact throw distance.

What is the throw distance for the Optoma HD146X on a 120-inch screen?

On a 120″ 16:9 screen the Optoma HD146X needs about 12.8–14.1 ft from lens to screen, based on its 1.47–1.62 throw ratio.

What screen works best with the Optoma HD146X?

The Optoma HD146X works with a standard matte-white screen in a dark room, or an ALR screen if you watch with ambient light.

Is the Optoma HD146X bright enough for a room with some light?

At 3,600 lumens the Optoma HD146X holds up in a living room with some ambient light, especially on an ALR or CLR screen. For a fully bright room, dim what you can or use a high-gain ALR screen.

Is the Optoma HD146X good for gaming?

Its input lag is around 16 ms, which is good for most gaming.

Optoma HD146X: throw distance & specs

Quick answer

The Optoma HD146X sits 10.7–11.8 ft from a 100″ screen and about 12.8–14.1 ft from a 120″ screen, set by its official 1.47–1.62 throw ratio. At 3,600 lumens it pairs best with a matte-white screen in the dark, or an ALR screen with some ambient light.

Throw ratio

1.47–1.62

Brightness

3,600 lumens

Resolution

1080p

Type

lamp

Specifications

Throw ratio	1.47–1.62
Brightness	3,600 lumens
Resolution	1080p
HDR	No
Light source	lamp
Type	Standard throw
Input lag	16 ms
Price	~$570

Check price →

Throw-distance calculator

Screen size (diagonal, inches)

Optoma HD146X — distance for a 100″ screen

10.7–11.8 ft

Lens-to-screen distance. Zoom (if any) lets you fine-tune within the range.

Throw distance by screen size

How far the Optoma HD146X sits from the screen at common 16:9 sizes, across its full zoom range.

Screen (16:9)	Image width	Throw distance
90″	78″	9.6–10.6 ft
100″	87″	10.7–11.8 ft
120″	105″	12.8–14.1 ft
150″	131″	16.0–17.6 ft

Every projector’s throw distance, by screen size: 100-inch screen · 120-inch screen

Which screen for the Optoma HD146X?

The Optoma HD146X 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.

ALR (standard throw)

Elite Screens Aeon CineGrey 3D (AR100DHD3)

1.2 gain · 100″

ALR (standard throw)

Elite Screens Sable Frame CineGrey 3D (ER100DHD3)

1.2 gain · 100″

ALR (standard throw)

Elite Screens Aeon CineGrey 5D (AR103DHD5)

1.5 gain · 103″

Frequently asked questions

For a 100″ 16:9 screen the Optoma HD146X needs about 10.7–11.8 ft from lens to screen, based on its 1.47–1.62 throw ratio. Use the calculator above for your exact screen size.

Compare with

vs

Optoma HD146X vs Epson Home Cinema 880

1.21–1.63 · 3,300 lm

vs

Optoma HD146X vs LG CineBeam PF610P

1.2 · 1,000 lm

vs

Optoma HD146X vs Samsung The Freestyle (2nd Gen)

1.2 · 230 lm

Guides for this projector

Guides

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.

Guides

Projector 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.

Guides

Projector ceiling mount height

Mount the projector so its lens lines up with the top of the image when the projector has 0% offset (most do), then fine-tune with lens shift. A 100-inch 16:9 image is 49 inches (124 cm) tall, and the screen bottom usually sits 24-36 inches (60-90 cm) above the floor for seated eye level.

Not sure it fits? Run your exact screen size through the calculator.

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Updated October 19, 2026