Interval Finder
Pick 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 · pick one to move A
Moving· press 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
Inversion
Lift the lower note an octave and Minor 3rd becomes Major 6th.
m3+9M6
E♭4 → C5 · 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
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. A right answer moves on by itself. After a wrong one the correct name is shown, and you can press Listen again before going to the next question.
Frequently asked questions
- 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.