Work out the interval between any two notes. Select a low note and a high note with their octaves and this tool counts the semitones between them, names the interval such as major third or perfect fifth, and shows the frequency ratio in equal temperament. Intervals are the building blocks of chords, scales and melody, and knowing the semitone count makes it easy to transpose a line or spell a voicing. The tool wraps interval names across octaves, so a distance of nineteen semitones reads as a compound fifth and still gives you the raw count. The ratio figure tells you how the two frequencies relate, which is why a perfect fifth of seven semitones sits close to the pure three to two ratio. Change either note and everything updates instantly.
It names the interval between the two notes, counts the semitones and shows the frequency ratio.
The name comes from the number of semitones, for example seven semitones is a perfect fifth and twelve is an octave.
The ratio is how the two pitches relate, so an octave is a two to one ratio and a perfect fifth is close to three to two.
Work out the interval between any two notes. Select a low note and a high note with their octaves and this tool counts the semitones between them, names the interval such as major third or perfect fifth, and shows the frequency ratio in equal temperament.
Yes. Note Interval Calculator is completely free, with no sign-up and no usage limits.
Yes. Note Interval Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Note Interval Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.