Reference
Piano notes chart.
Every note on the keyboard. Seven white keys repeat forever; the five black keys in between carry two names each, and which one you use depends on the key you are in.
The map
Two octaves, every key named.
White keys are the naturals — C D E F G A B, repeating forever. The five black keys in between each answer to two names, one sharp and one flat, for the same pitch; they are spelled out in full below.
The alphabet
The twelve chromatic notes.
Western music runs out of note names after twelve and starts again an octave higher. Seven of them are naturals; the other five each answer to two names.
Naturals — 7
Sharps — raised a semitone
Flats — lowered a semitone
Same pitch, different name
F♯ and G♭ are the same fret and the same key — the spelling depends on the key you are in. A key with sharps in its signature calls it F♯; a key with flats calls it G♭. That is why key pages spell their chords the way they do.
Next
What to do with this.
The keyboard hides nothing: every note is visible and the black-key groups of two and three tell you where you are without counting. Find C by looking for the white key immediately left of any group of two black keys, and the rest follows.
Once the notes are under your fingers, the useful next step is the complete piano chord index — every chord we have a voicing for, grouped by root — or the scale library, which turns these twelve notes into patterns you can actually play over.