Projector Throw
Throw distance from lens throw ratio + screen width. Zoom lenses give a range.
Screen width from diagonal
Computed width fills the screen-width field above.
Screen Size
Diagonal ↔ width × height for common aspect ratios.
Area: –
Power / Amperage
Watts ↔ amps, and how much fits on a circuit (continuous load capped at 80%).
Safe continuous capacity (80%)
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Audio Delay
Delay-tower / speaker time alignment. Sound ≈ 343 m/s (1125 ft/s) at 20 °C.
Also useful: SPL drops ~6 dB per doubling of distance (inverse-square).
LED Wall
Physical size + resolution from panel count & pixel pitch. Plus optimal viewing distance.
Optimal viewing distance ≈ – (pitch-mm rule of thumb). Total pixels: –
Cable Run Limits
Max recommended run before you need an extender, HDBaseT, or fiber.
Video Bandwidth
Data rate for a video format → which SDI standard & HDMI version carries it.
Approximate (raw uncompressed). Real SDI maps 10-bit 4:2:2; treat as a sizing guide.
dB / Gain
Convert between a ratio and decibels. Voltage uses 20·log, power uses 10·log.
Type in either box — the other updates. 2× voltage ≈ +6 dB; 2× power ≈ +3 dB.
Load List
Add your gear → total draw → how many circuits you need.
Circuits needed (80% derate)
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