Free Chord Calculators & Music Theory Tools
Learn music theory, build chords, explore scales, analyze harmony, and improve your instrument skills with our collection of free online music calculators. Whether you’re a guitarist, pianist, composer, producer, teacher, or student, these interactive tools help you understand keys, chord progressions, inversions, and fretboard patterns in seconds—right from your browser.
Secondary Dominant Calculator
Find secondary dominant chords instantly to create richer harmonic movement and stronger chord progressions.
Open Tool →
Key Signature Calculator
Identify major and minor key signatures with sharps, flats, and related musical information.
Open Tool →
Voice Leading Calculator
Create smoother chord transitions by finding efficient voice-leading between harmonic changes.
Open Tool →
Music Note Calculator
Calculate musical notes, intervals, and note relationships for theory and composition.
Open Tool →
Guitar Chord Finder
Search guitar chords by note or chord name with multiple playable finger positions.
Open Tool →
Guitar Chord Generator
Generate accurate guitar chord shapes across the fretboard for any chord type.
Open Tool →
Chord Transposer
Transpose songs and chord progressions into any key without changing their structure.
Open Tool →
Chord Diagram Maker
Design custom chord diagrams for guitar lessons, tutorials, practice sheets, and songwriting.
Open Tool →
Chord Inversion Calculator
Discover root position and inversions for better arranging, composing, and accompaniment.
Open Tool →
Guitar Scale Calculator
Explore guitar scales, modes, notes, and fretboard patterns in every musical key.
Open Tool →
Piano Chord Calculator
Generate piano chords with note spellings, inversions, and keyboard layouts instantly.
Open Tool →
Circle of Fifths Calculator
Visualize key relationships, relative minors, and harmonic movement using the Circle of Fifths.
Open Tool →