How do I name an interval?

Count the letter names from the lower note to the upper one, both included, for the number. Then the semitones give the quality: perfect, major, minor, augmented or diminished.

An interval of six semitones: an augmented 4th or a diminished 5th, depending on how it is spelled.

Why is B called H in German?

In German, B means B flat and H means B natural. Sharps add -is (Fis) and flats -es (Es, As).

What is the difference between melodic and harmonic intervals?

Melodic intervals are played one note after the other; harmonic intervals are played together.

Intervals and note names

Hear every interval on any note, and look up note names in other languages.

Lowest note

Intervals

Interval	Semitones	Notes	Play

Note names in other languages

English	German	French	Italian	Spanish

In German, B is B flat and H is B natural; sharps add -is and flats -es (Fis, Es).

About this tool

An interval is the distance between two notes. Choose the lower note to see every interval from a unison to an octave built on it, with the number of semitones and the two notes spelled correctly, and hear each one melodically (one after the other) or harmonically (together). Below is a table of note names in English, German, French, Italian and Spanish, including the German H.

Tips

Then count semitones for its quality: 4 is major, 3 is minor.
Augmented 4th and diminished 5th are both 6 semitones: the tritone.

FAQ

How do I name an interval?: Count the letter names from the lower note to the upper one, both included, for the number. Then the semitones give the quality: perfect, major, minor, augmented or diminished.
What is a tritone?: An interval of six semitones: an augmented 4th or a diminished 5th, depending on how it is spelled.
Why is B called H in German?: In German, B means B flat and H means B natural. Sharps add -is (Fis) and flats -es (Es, As).
What is the difference between melodic and harmonic intervals?: Melodic intervals are played one note after the other; harmonic intervals are played together.