A half step is the distance from one key on the piano to the nearest key beside it, black or white. A whole step is two half steps. Scales, chords, and tunes are all built from these two sizes of step.
Find them on the piano
A half step. Play any key. Then play the key that touches it, with no key between. From C to the black key on its right is a half step. From that black key to D is a half step too.
A whole step. Play any key. Skip one key, black or white, and play the next. From C to D is a whole step, since the black key sits between them.
| From | To | Size |
|---|---|---|
| C | C sharp | Half step |
| C | D | Whole step |
| E | F | Half step |
| E | F sharp | Whole step |
| B | C | Half step |
The two white-key half steps
Look at the white keys. Most pairs of white keys have a black key between them. Two pairs do not: E and F, and B and C.
Those two pairs are half steps, even though both keys are white. This is the detail that trips up beginners. A step from one white key to the next is a whole step five times out of seven, and a half step the other two.
Other names
In Britain and in many other countries, a half step is called a semitone, and a whole step is called a tone. The words mean the same thing.
The recipe for a major scale
A major scale is a row of eight notes with a set pattern of steps.
| Step | 1 to 2 | 2 to 3 | 3 to 4 | 4 to 5 | 5 to 6 | 6 to 7 | 7 to 8 |
|---|---|---|---|---|---|---|---|
| Size | Whole | Whole | Half | Whole | Whole | Whole | Half |
Start on C and follow the recipe, and every note is a white key. The two half steps land on E to F and on B to C, where the piano has no black keys.
Start on any other note, and the recipe calls for black keys. That is why other scales have sharps or flats. Read major and minor scales explained for kids and sharps, flats, and naturals explained for kids.
Scales made of one size
The chromatic scale uses half steps alone. It plays every key in a row, black and white. There are 12 half steps in an octave.
The whole-tone scale uses whole steps alone. It has six different notes, and it sounds dreamy and unsettled. Debussy used it often. Read Debussy for kids.
On other instruments
- Guitar and ukulele: one fret is a half step. Two frets make a whole step.
- Violin: for a half step, two fingers touch. For a whole step, there is a small gap between them.
- Voice: a half step is the smallest step in most of the songs we sing.
Hear them in music
A half step. The first two notes of Für Elise rock back and forth by a half step. So does the famous two-note theme for the shark in a well-known film.
A whole step. The first two different notes of “Happy Birthday” are a whole step apart. So are the first two notes of “Frère Jacques.”
Musicians have names for these distances. A half step is a minor second, and a whole step is a major second. Read intervals explained for kids.
Things to do together
Half or whole? Play two keys. Your child says “half” or “whole.” Start with the eyes open, and then try it by ear.
Find the white half steps. Ask your child to find the two places where white keys touch with no black key between.
Build a scale. Start on G. Follow the recipe: whole, whole, half, whole, whole, whole, half. One black key will appear. Ask which one.
Walk the chromatic scale. Play every key from one C to the next. Count the half steps. There are 12.
Print and play
Print the piano keyboard chart. For the next idea, read key signatures explained and the circle of fifths explained. For games, read ear training games for kids.
More from this guide
This article is part of Music theory for parents: what your child is learning and how to help.
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Use it with your kids
Print a listening page, a practice chart, or a composer fact sheet. Or try a tool, such as the composer timeline or the piece picker.