Calculators
Event production calculators
Free calculators for the math live event crews do every day: delay times, amp draw, throw distances, and more. Each one shows its formula and a worked example, so you can sanity-check the result before you trust it with a show.
Speaker Delay Calculator
Free speaker delay calculator for live sound. Convert distance to delay time in milliseconds using the temperature-corrected speed of sound, with sample-accurate results.
Power & ElectricalEvent Power Calculator (Watts to Amps)
Free watts-to-amps calculator for event power. Single-phase and three-phase current draw with power factor, plus breaker sizing using the 80% continuous load rule.
AudiodBu / dBV / Volts Converter
Convert between dBu, dBV, volts RMS, and milliwatts in one place. Free audio signal level converter with the +4 dBu / -10 dBV explanation engineers actually need.
AudioSPL Distance Calculator
How loud is a speaker at distance? Free inverse square law calculator: SPL drops 6 dB per doubling of distance from a point source. Includes line array caveats.
AudioDecibel Addition Calculator
Add decibel levels correctly: two equal incoherent sources sum to +3 dB, coherent ones to +6 dB. Free SPL addition calculator for up to four sources.
AudioWireless Mic Intermod Calculator
Check wireless microphone frequencies for third-order intermodulation. Free IM3 calculator for 2 to 4 transmitters with guard margins and spacing checks.
Power & ElectricalGenerator Size Calculator
What size generator does your event need? Add department loads, apply power factor and safe loading, and get the required kW/kVA plus a standard rental size.
Power & ElectricalCable Voltage Drop Calculator
Voltage drop calculator for event power runs and speaker lines. Copper resistance by AWG, percent drop against the 3% guideline, and speaker power loss in dB.
Rigging & StagingTruss Load Calculator
Calculate how truss loads distribute to the supports: uniformly distributed weight plus point loads on a simply supported span. Statics only, with clear limits.
Rigging & StagingHang Point Load Calculator
Distribute truss and fixture weight across 2 to 4 hang points with uneven spacing. Lever-rule load distribution per point, in pounds, statics only.
Rigging & StagingBridle Calculator
Two-leg bridle calculator for rigging: leg lengths from span and drop, plus the tension in each leg for a given load, with included-angle warnings.
LightingDMX Address & Universe Calculator
How many DMX universes do you need? Compute universes from fixture count and channel footprint, list start addresses, and convert addresses to DIP switches.
LightingBeam Angle Calculator
Convert beam angle and throw distance to spot size: diameter = 2 × throw × tan(angle/2). With beam vs field angle explained and PAR lens reference figures.
Video & LEDVideo Latency Calculator
Add up camera, switcher, scaling, and LED processing delay to get glass-to-glass latency in frames and milliseconds. Free IMAG delay calculator.
Video & LEDLED Wall Flicker Calculator
Will your camera see LED wall flicker? Compare exposure time against panel refresh rate: banding appears when the shutter captures less than one full PWM cycle.
Video & LEDLED Pixel Pitch Calculator
What pixel pitch do you need? Free calculator for LED wall viewing distance (1 m per 1 mm rule and acuity limit) plus wall resolution from size and pitch.
Production ManagementSMPTE Timecode Calculator
Add and subtract SMPTE timecode at 23.976, 24, 25, 29.97 drop/non-drop, and 30 fps, with exact drop-frame math and frame-count conversion.
Production ManagementRun of Show Timing Calculator
Free run of show timing calculator: enter segments and durations to get start and end times, forward from a start time or backward from a hard out.
AudioNoise Exposure Calculator
How long can you work at 100 dB? Free noise dose calculator using NIOSH (85 dBA, 3 dB exchange) and OSHA (90 dBA, 5 dB) formulas, framed for show crews.
Video & LEDProjector Brightness Calculator
How many lumens do you need? Convert projector lumens and screen size to foot-lamberts and nits, with target brightness bands for dark, dim, and lit rooms.
Production ManagementTruck Pack Calculator
Estimate how many trucks a show needs from total case volume, truck size, and pack efficiency. Planning math for sprinters, box trucks, and 53-foot trailers.