What is the name of the major scale with no sharps or flats?

The major scale with no sharps or flats is C major.

The C major scale consists of the notes C, D, E, F, G, A, and B, followed by a higher C. On a piano, it can be played using only the white keys, making it a common starting point for learning scales, key signatures, and basic harmony. Its key signature contains no accidentals.

The scale follows the major-scale interval pattern of whole step, whole step, half step, whole step, whole step, whole step, and half step. Starting on C produces that pattern naturally with the seven letter names, so no note needs to be raised or lowered with a sharp or flat.

C major is closely related to A minor, its relative minor, because both use the same notes. Its parallel minor is C minor, which does require flats. The answer refers to the standard natural major scale and its key signature; unusual or altered scales such as harmonic major are different constructions. In music theory, C major is also called the Ionian mode beginning on C.