Sound Tools

5 free online tools for sound professionals.

These sound calculators are built for theatre technicians and live event teams, with practical workflows for planning, troubleshooting, and fast technical checks during production. Includes: Speaker Delay Calculator, Ohm's Law Calculator, Milliseconds to Feet, Speaker Impedance, dB / SPL Calculator.

Speaker Delay Calculator

Calculate speaker delay time from source distance, with corrections for temperature and humidity effects on the speed of sound. Free online tool.

Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's Law and the power equation. Enter any two known values to solve for the rest.

Milliseconds to Feet

Convert between delay time in milliseconds and the distance sound travels in feet or metres. Adjustable for ambient temperature and humidity.

Speaker Impedance

Calculate total impedance for series, parallel, and series-parallel speaker wiring. Supports mixed impedance drivers with power share and amp safety checks.

dB / SPL Calculator

Combine dB levels, calculate inverse square law distance attenuation, and convert between dBu, dBV, dBFS, Vrms and Watts.

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