Free online music theory and songwriting tools for musicians. Transpose chords, find tempo, explore the circle of fifths, and more.

MusicToolLab

Free Online Tools for Musicians
Tap BPM Tool
Tap along with your song to instantly calculate tempo (BPM) for your DAW or metronome.
Chord Transposer
Transpose guitar and piano chords to any key instantly. Perfect for singers and capo users.
Capo Finder
Find the correct capo fret and chord shapes to play in any key on guitar.
Circle of Fifths
Interactive circle of fifths chart with major scales and diatonic chords.
Roman Numeral Converter
Convert chord progressions into Roman numerals (I, IV, V, vi) in any key.