Interval Calculator

Select two notes to discover the interval between them.

Note A (root)

Note B (target)

All Intervals Reference

Name	Short	Semitones	Consonance	Remember it as
Unison	P1	0	perfect	(same note)
Minor 2nd	m2	1	dissonant	"Jaws" theme
Major 2nd	M2	2	dissonant	"Happy Birthday"
Minor 3rd	m3	3	imperfect	"Smoke on the Water"
Major 3rd	M3	4	imperfect	"When the Saints"
Perfect 4th	P4	5	perfect	"Here Comes the Bride"
Tritone	TT	6	dissonant	"The Simpsons" theme
Perfect 5th	P5	7	perfect	"Twinkle Twinkle"
Minor 6th	m6	8	imperfect	"The Entertainer"
Major 6th	M6	9	imperfect	"My Bonnie"
Minor 7th	m7	10	dissonant	"Somewhere" (bridge)
Major 7th	M7	11	dissonant	"Take On Me" (intro)

About Intervals

A musical interval is the distance between two pitches, measured in semitones (half-steps). Intervals are the building blocks of chords and melodies — understanding them is essential for music theory, composition, and ear training.

Consonance and dissonance

Perfect intervals (unison, 4th, 5th) sound stable and resolved in any context
Imperfect intervals (3rds, 6ths) are pleasing but with a gentle colour or tension
Dissonant intervals (2nds, 7ths, tritone) create tension that typically resolves

Using intervals in composition

Parallel perfect 5ths were banned in classical counterpoint — they produce a hollow sound. The tritone (6 semitones) is called "diabolus in musica" (the devil in music) for its extreme dissonance, but it's also the driving tension in blues and jazz.