Projection Calculator

Throw distance, screen size, and lens shift calculations for projector placement.

Mode & Setup

Projector Info

Output resolution?

Throw (m)?

Lens TR?

= 1.500:1

Lumens (ANSI)

Stacked?

Screen

Width (m)

Height (m) — overrides AR?

AR: 1.778:1 (from projector)

Screen gain?

Viewing

Distance (m)

Eye sensitivity

Throw Ratio?

1.500: 1

Lens range (±10%): 1.35 – 1.65

Screen Dimensions?

10.00 × 5.63m

AR 1.778 : 1

Screen Luminance?

10.5fL

36 cd/m²

Lumens Needed (per projector)?

26,630lm

ANSI lumens — SMPTE 14 fL reference

Canvas Resolution?

3,840 × 2,160

AR 1.778 : 1

Effective Aspect Ratio?

1.778: 1

3,840 × 2,160 px

Pixel Pitch on Screen?

2.6mm

canvas 3,840 × 2,160

Min Viewing Distance?

9.0m

✓ 20.0m seat distance OK

Resolution Check?

SUFFICIENT

3,840px ≥ ~1,719px needed at 20.0m

Vertical Offset?

Throw Distance?15.00 m

Vertical lens shift0%

Centre offset from lens axis0.00 m

Image top edge?+2.81 m above lens

Image bottom edge?-2.81 m above lens

⚡ MARGINAL: 10.5 fL is below the 14 fL reference. Dark room only — consider more lumens, higher gain screen, or smaller image.

Canvas 3,840 × 2,160 — pixel pitch: 2.6mm on screen. Pixels resolve below 9.0m. ✓ At 20.0m the image will appear smooth.