Music & Audio
Music & Audio Calculators
Convert tempo, frequency, notes, keys, and audio timing for musicians and producers.
14 tools
Audio File Size Calculator
Audio file size calculator: estimate WAV, FLAC, or MP3 storage requirements from sample rate, bit depth, channels, and track length. Free, private, no signup.
Chord Progression Generator
Chord progression generator: build chord sequences in any key and scale, with roman numerals and audio playback. Free, private, runs in your browser, no signup.
Delay Time Calculator
Delay time calculator: convert BPM into note-length delay times in milliseconds for quarter, eighth, dotted, and triplet settings. Free, runs locally, no signup.
Equalizer Q Calculator
Equalizer Q calculator: convert EQ bandwidth and octave width into Q factor for precise filter settings on any mixing console or plugin. Free, no signup.
Music Interval Calculator
Music interval calculator: name the interval between any two notes or frequencies in semitones, quality and enharmonic names. Free, runs locally, no signup.
Tempo Change Calculator
Tempo change calculator: find the new BPM after a percent change, or the exact percent shift needed to match a target tempo or key. Free, runs locally.
Audio Time Stretch Calculator
Audio time stretch calculator: compute the new duration or tempo ratio when changing playback speed without shifting pitch. Free, private, runs locally.
BPM to MS Calculator
BPM to ms calculator: convert beats per minute into milliseconds for every note division, so your delay and LFO times lock to tempo. Free, runs in your browser.
Frequency to Note Converter
Frequency to note converter: turn any Hz value into its musical note plus cents detuning from pitch. Free tuner helper, private, runs in your browser.
Key Transposition Calculator
Transpose key calculator: move chords, scales and guitar capo positions between any key by semitone, with note mapping and capo fret shown. Free, private.
Metronome BPM Calculator
Metronome BPM calculator: convert tempo markings like allegro or largo into exact BPM ranges and back. Free tool, private, runs locally, no signup needed.
Scale Finder Calculator
Scale finder calculator: get the notes for major, minor, pentatonic, and mode scales from any root note for songwriting. Free, private, runs in your browser.
Vinyl RPM Calculator
Vinyl RPM calculator: find pitch change and speed error for 33, 45, and 78 RPM records at any turntable pitch setting. Free, runs locally in browser, no signup.
dB to Volume Ratio Calculator
dB to volume calculator: convert decibels to power and amplitude ratios, where a 10 dB change is about twice the perceived loudness. Free, private, no signup.