Scale
The F♯ major scale has 7 notes: F♯, G♯, A♯, B, C♯, D♯, E♯. Its enharmonic twin is G♭ major. Hear it, see it on the keyboard and find the chords that belong to it.
6 sharps: F♯, C♯, G♯, D♯, A♯, E♯
Roman numerals show each chord's degree in the key. Upper-case is major, lower-case minor, ° diminished.
The major scale follows the step pattern W W H W W W H. It is the basis of Western tonal harmony, and every major key has a relative minor that shares its notes and key signature.
Use the Scale & Chord Finder to look up any other root or mode.