Music & Audio
Notes, tempo, intervals and audio calculations.
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Audio Bitrate / File Size Estimator Estimate audio file size from duration and bitrate.
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BPM ↔ Milliseconds Converter Convert tempo between BPM and beat duration; show subdivisions and bar length.
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Camelot Wheel Look up a key's Camelot notation and harmonic-mixing neighbours.
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Capo Reverse Finder For any target chord, list every capo fret and easier shape that produces it.
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Cents / Pitch Shift Calculator Convert between cents, semitones and frequency ratios.
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Chord Builder & Reference Build chord voicings from a root and chord symbol.
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Chord Progression Builder Render Roman-numeral chord progressions for any major or minor key.
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Circle of Fifths Reference Major / relative-minor keys with their sharps and flats.
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DAW Bar:Beat → Seconds Convert a DAW bar.beat.sixteenth position into elapsed seconds at any BPM.
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Decibel Calculator Add or subtract incoherent dB levels and predict SPL at a new distance.
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Drum Pattern Generator Generate a 16th-note grid for rock, funk, samba, trap, house or reggae grooves.
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Frequency to MIDI Note Convert any frequency to its nearest MIDI note and pitch deviation in cents.
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Key Transposer / Capo Calculator Transpose chord names up or down by semitones (capo positions).
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Metronome Click-track metronome at any tempo with downbeat accent.
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Music Modes Reference Diatonic modes (Ionian, Dorian, Phrygian, …) with interval patterns.
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Musical Interval Calculator Map interval names to semitones, cents and frequency ratios.
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Note Frequency Calculator Frequency in Hz for any musical note, with adjustable concert pitch.
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Roman Numeral Chord Analyzer Map a chord progression into Roman numerals in a given key.
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Scale Reference Notes in any common scale starting on any root.
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Sound Pressure Level Reference Reference SPL levels (dB) for everyday sounds.
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Tap Tempo Tap a button to measure the BPM of any rhythm.
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Time Signature Duration Calculator Convert bars and time signatures into seconds at any BPM.