Audiofile Calc — LUFS, dB, Hz

The audio engineering calculator you've relied on for years — completely reimagined. Audiofile Calc has been rebuilt from the ground up with a modern interface, ergonomic controls, and a new Calc Pro tier that takes your calculations further. Now with a free dB Converter for instant decibel-to-ratio conversions, and Varispeed — the pitch shift BPM calculator our users asked for. FREE CALCULATORS Length – Note Length – Bar Length – Song Length – Beats to Tempo – Time to Samples – Samples to Time – Timecode to Time – Compare Tempos – Change Tempo – Add Times Pitch – Note Name to Frequency / MIDI / Wavelength – Frequency to Note Name / MIDI / Wavelength – Wavelength to Frequency / Note Name / MIDI Timecode – Frames to Timecode – Convert Timecode – Change Timecode Electric – Compare Power – Compare Voltage – NEW: dB Converter — turn any decibel value into its voltage (amplitude) and power ratios Acoustics – Distance to Time – Delay – Time to Distance – Sound Pressure Level (SPL) – Panning – PAG-NAG Files – File Size CALC PRO — $4.99 one-time Unlock a suite of advanced calculators built for professional engineers and producers: – NEW: Varispeed — tape-style and sampler speed changes, where tempo and pitch are coupled. Enter any BPM change and get the pitch shift in semitones, sampler-ready semitones + cents, and speed percentage – LUFS Target — streaming loudness compliance for Spotify, Apple Music, YouTube, and broadcast (EBU R128) – Nyquist Frequency — sample rate requirements, aliasing thresholds, anti-aliasing filter cutoffs – Equal Loudness — Fletcher-Munson curves, equal-loudness compensation – Cable Attenuation / Impedance — signal loss over cable runs, impedance matching – Batch Conversion — sweep values through any calculator simultaneously – PDF Share — export any calculation as a clean, professional PDF ready for clients, session notes, or technical documentation One-time purchase. No subscription. Audiofile is a boutique technology company building precision tools for the world's musicians and engineers.