Music Theory

Music theory calculators for intervals, chord building, scale generation, circle of fifths, tuning systems, and harmonic analysis.

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Calculate the musical interval between two notes including semitones, interval name, and quality.

Build chords from root note and chord type. See note composition and inversions.

Generate scale notes for major, minor, pentatonic, blues, and modal scales from any root note.

Explore key relationships using the circle of fifths. Find dominant, subdominant, relative, and parallel keys.

Calculate BPM from a counted number of beats over a time period, with subdivision support.

Determine the likely key of a song by entering the notes present in the melody or chords.

Analyze a chord progression by determining scale degrees and identifying common patterns.

Compare note frequencies across equal temperament, just intonation, and Pythagorean tuning systems.

Plan a smooth modulation between two keys. Find pivot chords, common tones, and smoothness score.

Calculate exact note durations at any tempo, including dotted notes and tuplets.