Music Note Intervals Calculator

Musical intervals are the distances between two notes in a musical scale. Understanding intervals helps musicians create harmonious melodies and chords. This calculator determines the interval between any two notes in the chromatic scale, including the number of semitones and the interval name.

What is a musical interval?

A musical interval is the distance between two pitches. It's measured in semitones and has a specific name that describes its quality (major, minor, perfect) and size (unison, second, third, etc.).

Intervals are fundamental to music theory. They help musicians understand harmony, melody construction, and chord progressions. The most common intervals are:

Unison (0 semitones)
Minor second (1 semitone)
Major second (2 semitones)
Minor third (3 semitones)
Major third (4 semitones)
Perfect fourth (5 semitones)
Perfect fifth (7 semitones)

In equal temperament tuning, each semitone is exactly 100 cents, and each whole tone is 200 cents. This system ensures consistent intervals across the chromatic scale.

How to calculate note intervals

To calculate the interval between two notes:

Identify the starting note and its octave
Identify the ending note and its octave
Count the number of semitones between them
Determine the interval name based on the number of semitones

Formula: Interval = |(Ending Note Position) - (Starting Note Position)| mod 12

Where note positions are numbered from 0 (C) to 11 (B) in the chromatic scale.

For example, the interval between C and E is 4 semitones (a major third).

Common musical intervals

Interval Name	Semitones	Example
Unison	0	C to C
Minor second	1	C to C#
Major second	2	C to D
Minor third	3	C to D#
Major third	4	C to E
Perfect fourth	5	C to F
Perfect fifth	7	C to G

Practical uses of intervals

Understanding intervals has practical applications in music:

Creating melodies with smooth transitions
Building chords that sound harmonious
Improvising solos with appropriate notes
Analyzing existing music to understand its structure

Musicians use interval knowledge to:

Write songs with catchy melodies
Compose background music for films or games
Learn new instruments by understanding note relationships
Improve ear training skills

FAQ

What is the smallest musical interval?: The smallest interval is the unison, which is when two notes are the same pitch.
How many semitones are in a perfect fifth?: A perfect fifth consists of 7 semitones.
What is the difference between a major and minor third?: A major third has 4 semitones, while a minor third has 3 semitones.
Can intervals be larger than an octave?: Yes, intervals can be larger than an octave (12 semitones). For example, a ninth is 14 semitones.
How do I use this calculator?: Enter the starting note and ending note in the calculator, then click "Calculate" to see the interval name and number of semitones.