Learn interval names by ear: Pair labels like 'minor third' or 'perfect fifth' with their actual sound and distance in semitones. Understand how chords are built: Chords are stacks of intervals. See what intervals turn a root into a major triad, minor triad, or seventh chord. Support ear training and transcription: Play intervals melodically and harmonically so you get comfortable recognizing both kinds of contexts.

1. In the top bar, pick Note 1 (the reference) and Note 2, plus an octave and direction (↑ / ↓). 2. The result card shows the interval abbreviation (e.g. P5), its name, semitone count, and consonance. 3. Use 'Seq' in the bottom dock to play the two notes in order, or 'Sim' to hear them together. 4. The piano highlights the reference note in purple and the comparison note in amber. 5. Tap any row in the table to snap Note 2 to that interval instantly.

Melody & Ear

Interval Calculator

Select two notes to instantly see the interval name, semitone count, and consonance level.

About this tool

Select two notes to instantly see the interval name, semitone count, and consonance level.

Pick two notes to name the interval between them.

Note 1 (root)

Note 2

Octave

How to use ↓

Perfect Fifth

7 semitones

Perfect consonance

All intervals

Name	Semitones	Consonance
Perfect Unison	0	Perfect consonance
Minor Second	1	Dissonant
Major Second	2	Dissonant
Minor Third	3	Imperfect consonance
Major Third	4	Imperfect consonance
Perfect Fourth	5	Imperfect consonance
Augmented Fourth (Tritone)	6	Dissonant
Perfect Fifth	7	Perfect consonance
Minor Sixth	8	Imperfect consonance
Major Sixth	9	Imperfect consonance
Minor Seventh	10	Dissonant
Major Seventh	11	Dissonant
Perfect Octave	12	Perfect consonance

What is this tool?

An interval calculator that shows the name, semitone distance, and consonance of any two notes you pick — plus a piano view and the option to hear them played one after the other or together.

When it helps

Learn interval names by ear

Pair labels like 'minor third' or 'perfect fifth' with their actual sound and distance in semitones.
Understand how chords are built

Chords are stacks of intervals. See what intervals turn a root into a major triad, minor triad, or seventh chord.
Support ear training and transcription

Play intervals melodically and harmonically so you get comfortable recognizing both kinds of contexts.

How to use

1 In the top bar, pick Note 1 (the reference) and Note 2, plus an octave and direction (↑ / ↓).
2 The result card shows the interval abbreviation (e.g. P5), its name, semitone count, and consonance.
3 Use 'Seq' in the bottom dock to play the two notes in order, or 'Sim' to hear them together.
4 The piano highlights the reference note in purple and the comparison note in amber.
5 Tap any row in the table to snap Note 2 to that interval instantly.

Lessons that use this tool

The sections of the systematic curriculum where this actually comes up.

Learning courses that include this topic

Following the course in order gives you a structured foundation.

Step 1

Composing Beginner Course

6 core steps + 3 bonus for people who want to write music

View course → →