Piano Interval Calculator for Note Spans

Piano Interval Calculator

Compare two notes by semitones, cents, frequency ratio, and 88-key span with a piano-focused theory workflow.

📋 Quick Presets
🔧 Calculator Inputs
Interval only keeps the name, semitones, and ratio front and center.
Primary result
--
Interval quality and number
Secondary result
--
Semitones and cents
Pitch ratio
--
Frequency multiplier
Keyboard span
--
88-key distance
Start note--
End note--
Direction--
Diatonic span--
Semitone span--
Start frequency--
End frequency--
Ratio--
Cents--
Key span--
📑 Interval Reference

Semitone step

1.05946

Equal temperament ratio

Octave

2.00000

Twelve semitones

Cents

100

Per semitone

Piano range

88 keys

A0 to C8

📊 Common Intervals
Interval Semitones Ratio Example
Unison01.0000C-C
Minor third31.1892C-Eb
Perfect fifth71.5000C-G
Octave122.0000C-C
📊 Piano Reference Notes
Note MIDI Key no. A4=440 Hz
A021127.50 Hz
C46040261.63 Hz
A46949440.00 Hz
C8108884186.01 Hz
💬 Practical Notes
Tip: The note letters decide the interval name, not just the semitone count.
Tip: Use the key span result to judge hand stretches and keyboard travel.

Piano intervals are the distance between two notes on the keyboards. Intervals are for every pair of notes in a chord or scale. That forms one of the main bases of music and its theory

In the C Major scale the space between C and D is a second. D is the second note here. A second interval goes from any white key to the next white key, up or down.

What Are Piano Intervals

Third intervals jump past one white key. From C to F are four notes in the scale, so it is a fourth.

When two white keys stand without a black between them, it is a semitone, half-tone or half-step. It is the smallest distance usually used in Western music. Between white keys happen only two such seconds: E to F and B to C, because there are no black keys between them.

A minor second is a semitone above the base. A major second is a whole tone above it. Minor seconds and thirds are a half step lower than majors.

This defines the quality of intervals.

There are five main interval kinds: minor, major, augmented, diminished and perfect. You build most chords using perfect, major and minor piano intervals. The mark “m7” shows a minor seventh interval.

It is the space of the root in a major scale until the seventh note, but lowered by one semitono.

In piano music intervals can be melodic, notes played one after the other… Or harmonic, so simultaneously. Finding them by ear, melodic and harmonic, is among the most useful music steps.

A good start is to recognize unison, major third and perfect fifth.

Choose an easy interval, as a minor third or perfect fifth, and play it everywhere on the instrument to help build the feeling. The sound of the two notes together stays alike no matter where. Flash cards with various intervals from different notes written also work well.

One way for ear training is to bind interval names to steps in known songs. Intervals really are usefull in many areas, depending on how you practice and use them. First learn them on piano really helps, thanks to the finger positions.

You play intervals in music on every instrument, not only piano. They form a basic, great musical element, simple and practical for understanding scales, chords and how musicworks.

Piano Interval Calculator for Note Spans

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