Audio, Acoustics & AV Calculators

Sound, acoustics, decibels and audio-visual calculators.

25 tools · 100% Free · Works Offline

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Delay Time CalculatorCalculate delay times in milliseconds for dotted, triplet and straight note values from a…

SPL Distance CalculatorCalculate how sound pressure level drops as you move away from a speaker or source using the…

Note Frequency CalculatorFind the frequency in hertz for any musical note and octave, or identify the closest note to a…

Reverb Time (RT60) CalculatorEstimate RT60 reverberation time for a room from volume and surface absorption using this free…

All Audio, Acoustics & AV Calculators (25)

Guide to Audio Calculators

This hub covers the numbers behind sound and audio-visual work: sound-pressure levels and how they fall off with distance, room acoustics and treatment, loudspeaker and amplifier matching, and digital-audio and projector/screen planning. It is used by live-sound and install engineers, home-studio owners, car-audio and subwoofer builders, and AV integrators specifying rooms.

Sound levels and coverage

Start with SPL Distance or Sound Distance Attenuation to predict how loud a source is at the listener; use Decibel Addition when several sources or speakers stack, and the ratio/amplifier tools to relate power to level.

SPL Distance Calculator Sound Distance Attenuation Calculator Decibel Addition Calculator Decibel Ratio Calculator Amplifier Power Output Calculator

Room acoustics and treatment

Use Reverb Time (RT60) and Room Absorption (Sabine) to judge how live a space is and how much treatment it needs, NRC to compare absorber materials, and Room Mode to locate problem low-frequency resonances by dimension.

Reverb Time (RT60) Calculator Room Absorption (Sabine) Calculator Noise Reduction Coefficient (NRC) Calculator Room Mode Calculator Sound Wavelength Calculator

Speakers, enclosures and amplifiers

Speaker Impedance checks series/parallel wiring stays amp-safe; Subwoofer Box Volume and Port Length tune an enclosure to a target; the 70V/100V load tool sizes distributed systems and cable-loss/crossover cover the wiring.

Speaker Impedance (Series/Parallel) Calculator Subwoofer Box Volume Calculator Subwoofer Port Length Calculator 70V/100V Line Speaker Load Calculator Speaker Cable Power Loss Calculator Speaker Crossover Component Calculator Amplifier Power Output Calculator

Digital audio, timing and tuning

Bitrate and File Size estimate storage and streaming budgets; Nyquist relates sample rate to usable bandwidth; Delay Time sets echoes/alignment to tempo, while the note/octave/frequency tools handle pitch and tuning.

Audio Bitrate Calculator Audio File Size Calculator Nyquist Frequency Calculator Delay Time Calculator Note Frequency Calculator Octave Calculator Frequency & Wavelength Calculator

AV display planning

Projector Throw Ratio matches a lens to room depth for a given image width, and Screen Size and Viewing Distance checks the picture is neither too small nor overwhelming from the seats.

Projector Throw Ratio Calculator Screen Size and Viewing Distance Calculator

Important calculation notice

These calculators are intended for education, estimation and preliminary checks. Verify all inputs, units, assumptions, material properties and applicable standards. Safety-critical or final engineering designs should be checked by a suitably qualified professional.

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Audio, Acoustics & AV Calculators

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All Audio, Acoustics & AV Calculators (25)

Acoustics & Room Sound11 calculators

Digital Audio & Recording5 calculators

Speakers, Amps & Wiring7 calculators

AV System Planning2 calculators

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