Field math
AV calculator
Fast operator checks for audio delay, projection, record storage, power, voltage drop, and SPL distance. Values update as you type and stay saved in this browser.
- 6 quick calculators
- Copyable field summary
- Instant updates
Audio Delay
Distance to delayDelay0 ms
Frames0 fr
48k Samples0
Enter speaker distance to calculate delay time.
Projection
Screen and throwHeight0 ft
Diagonal0 in
Ideal Throw0 ft
Use actual distance to compare against the lens throw ratio.
Record Storage
Bitrate to drive sizeBase Size0 GB
With Headroom0 GB
Per Hour0 GB
Use camera bitrate, feed count, and runtime to size recording media.
Power Load
Nameplate currentPer Device Current—
Total Nameplate—
Of 80% Planning Reference—
Planning reference: Enter the equipment nameplate current. Include startup or inrush demand and verify the distribution before assigning circuits.
Voltage Drop
Cable run lossDrop0 V
Percent0%
End Volts0 V
Keep drop under 3 percent for sensitive gear; under 5 percent overall.
SPL Distance
Inverse square lossSPL At Target0 dB
Loss0 dB
Doublings0
Free-field estimate. Real rooms add reflections and gain.
Operator Summary
SavedField verification required: confirm every result against equipment specifications and venue conditions before show use. Calculator output does not verify electrical safety or suitability.