Melody & Ear
Interval Calculator
Select two notes to instantly see the interval name, semitone count, and consonance level. Free browser interval calculator — no install needed.
P5
Perfect Fifth
7 semitones
All intervals
| Symbol | Name | Semitones | Consonance |
|---|---|---|---|
| P1 | Perfect Unison | 0 | Perfect consonance |
| m2 | Minor Second | 1 | Dissonant |
| M2 | Major Second | 2 | Dissonant |
| m3 | Minor Third | 3 | Imperfect consonance |
| M3 | Major Third | 4 | Imperfect consonance |
| P4 | Perfect Fourth | 5 | Imperfect consonance |
| A4d5 | Augmented Fourth (Tritone) | 6 | Dissonant |
| P5 | Perfect Fifth | 7 | Perfect consonance |
| m6 | Minor Sixth | 8 | Imperfect consonance |
| M6 | Major Sixth | 9 | Imperfect consonance |
| m7 | Minor Seventh | 10 | Dissonant |
| M7 | Major Seventh | 11 | Dissonant |
| P8 | 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.
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