Musical Interval Calculator

Calculate the musical interval between two notes including semitones, interval name, and quality.

First Note (0=C, 1=C#, ... 11=B)

First Note Octave

Second Note (0=C, 1=C#, ... 11=B)

Second Note Octave

Tab to move between fields

Semitones Apart

Interval Number5

Quality (1=min,2=maj,3=perf,4=aug,5=dim)3

Direction (1=up, -1=down)1

How to Use This Calculator

Enter First Note (0=C, 1=C#, ... 11=B), First Note Octave, and Second Note (0=C, 1=C#, ... 11=B).
Set Second Note Octave.
Review the Semitones Apart result.
Use Interval Number and Quality (1=min,2=maj,3=perf,4=aug,5=dim) to inform your decision.
Use the chart to visualize the results and explore different scenarios by adjusting inputs.

How the result changes with First Note Octave

First Note (0=C, 1=C#, ... 11=B): Semitone index of the first note. 0=C, 2=D, 4=E, 5=F, 7=G, 9=A, 11=B.
First Note Octave: Octave of the first note (middle C is octave 4).
Second Note (0=C, 1=C#, ... 11=B): Semitone index of the second note.
Second Note Octave: Octave of the second note.

Identify Input Parameters
4 parameters
First Note (0=C, 1=C#, ... 11=B) = 0, First Note Octave = 4, Second Note (0=C, 1=C#, ... 11=B) = 7, Second Note Octave = 4 = 4 input(s) provided
Calculate Semitones Apart
Semitones Apart
7 = 7
Calculate Interval Number
Interval Number
5 = 5
Calculate Quality
Quality
3 = 3

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