It's the same as a minor 3rd, so it has three half steps, or one whole step and one half step
An augmented second interval consists of two whole steps and one half step. In terms of scale degrees, it spans three semitones. For example, if you take C and move to D#, you cover this distance, which represents an augmented second. Thus, there are three half steps in the interval of an augmented second.
2 Half steps
2
5
When counted in half steps, B lies between these two notes. It implies that the interval has two half steps. Hence the interval between B flat and C is one whole step, one tone.
The word 'augment' means to raise by a half step musically. So, an augmented fourth would be a natural fourth ( 2 1/2 steps) raised by a half step ( a total of 3 whole steps). An augmented chord is built entirely out of augmented thirds, more commonly known as major thirds, and only contains three tones.
2 Half steps
Four half steps, or two whole steps.
1.5
1.5
2
5
When counted in half steps, B lies between these two notes. It implies that the interval has two half steps. Hence the interval between B flat and C is one whole step, one tone.
6 half steps
There are eight notes (steps) in a major musical scale. If whole steps are tones and half steps are semitones, then the order is tone, tone, semitone, tone, tone, tone, semitone.
In a perfect interval: 7 and a half steps In a 5th diminish: 6 and a half steps