Sharps, Flats, and Naturals: How to Read Accidentals

The notehead’s position on the staff gives you a letter name. A sharp (♯), flat (♭), or natural (♮) changes how you play that letter. These signs are called accidentals. Read the letter first, then apply the sign before you play.

A sharp raises a note by one half step; a flat lowers it by one half step. A half step is the distance between neighboring piano keys, whether the neighbor is black or white. F-sharp is the black key immediately right of F. B-flat is the black key immediately left of B.

A natural sign returns a note to its unaltered pitch. In a measure that shows F-sharp followed by F-natural in the same octave, the second note uses the white F key. The sign tells you to stop applying the sharp.

An accidental normally applies to later notes of the same letter and octave in that measure. A barline normally ends that effect. The key signature can still set a default sharp or flat in the next measure, so check it before reading on.

A sharp does not always lead to a black key. E-sharp is played on the white key normally called F; B-sharp is played on C. Likewise, C-flat sounds on the B key. The written spelling still matters because it shows the note’s role in the music.

Point to the written note, say its full name, then locate the neighboring key. Try F, F-sharp, F-natural slowly before mixing in other letters. Keep the letter and the change together when you name each pitch.

Use the Note Map to compare white and black keys, then return to Sight Reading Sprint for staff positions. When you can name the letter quickly, practice a short sequence such as F–F♯–F♮ on a piano or keyboard.