The distance between two pitches, measured in semitones. The same interval sounds the same regardless of which notes form it.

Recognising intervals by ear is the foundation of melodic transcription, harmonisation and improvisation.

Keep sessions short (3-5 minutes), use the Interval Song Chart for mnemonics, and start with harmonic before tackling melodic.

Interval Finder

Click any two notes and see the interval they form - with enharmonic spelling, inversion, sound and mnemonic. The ear-training quiz is one tab away.

A4 = 440 Hz · equal temperament

Minor 3rd

m3 · 3 ST · 300 ¢

Semitone ruler0-12 semitones · click to move A

Moving· click a key⇧ click · swap A↔B

Enharmonics

Three semitones aren't always a third. Spelling decides the name.

C-E♭minor 3rd

C-D♯augmented 2nd

B♯-E♭diminished 4th

Inversion

Lift the lower note an octave and Minor 3rd becomes Major 6th.

m3+9M6

C4 → Eb4 · 9 semitones

Sound

6:51.2000 · just intonation

Imperfect consonance - warm, slightly melancholic.

ConsonanceDissonance

Where it lives

C-E♭ shows up as a chord tone or a scale colour.

CmCm7CdimA♭maj7minor pentatonicblues scale

On the staff

Mnemonic

↑GreensleevesTraditional

↓Star Spangled BannerF. S. Key

↓Hey JudeThe Beatles

How to use it

Pick a difficulty: common intervals (m2, M2, m3, M3, P4, P5, octave) or all twelve.
Pick a direction: harmonic plays both notes together; melodic plays them one after the other.
Hit Listen, then choose the interval name. The audio plays again whether you're right or wrong, so the sound sticks.

What is an interval?: The distance between two pitches, measured in semitones. The same interval sounds the same regardless of which notes form it.
Why train this?: Recognising intervals by ear is the foundation of melodic transcription, harmonisation and improvisation.
Any tips?: Keep sessions short (3-5 minutes), use the Interval Song Chart for mnemonics, and start with harmonic before tackling melodic.