ThrowFit
Open calculator

Room depth → image range

Projector screen size calculator

Use available lens distance and the full zoom throw-ratio range to see the possible image diagonal.

Local geometry

Projector fit

No model lookup
Projected image aspect ratio
Known room depth
Projector throw-ratio range
Use the same value for a fixed lens.

Measure from the lens reference point to the image surface. Body depth, cables, zoom limits, lens shift, offset, focus, brightness, keystone, mounts, and tolerances are outside this geometry.

Calculated geometry

Possible image-size range

Possible image diagonal≈ 90.34–112.93 in
Image diagonal≈ 90.34–112.93 in229.47–286.84 cm
Image width≈ 78.74–98.43 in200–250 cm
Image height≈ 44.29–55.36 in112.5–140.63 cm
Lens distance≈ 3 m9.84 ft
Throw ratio1.2–1.5

W = D ÷ r = 3 ÷ 1.2–1.5

The aspect-ratio diagonal usually introduces a square root. ThrowFit keeps exact decimal inputs and unit conversions, then marks rounded display values with ≈.

Verify the final range, reference point, focus limits, and mounting clearance in the current manual for the exact projector and lens.