Transpose Down 12 Semitones (One Octave Lower)
Shifting any note down 12 semitones lowers it by exactly one octave.
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How to use this tool
- Enter note, octave and semitones to shift in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your transposed note and the full breakdown beneath it.
Transposing down an octave (−12 semitones) is used to move a melody to a lower register while keeping the same pitch class.
Frequently asked questions
- How many semitones is a perfect fifth?
- A perfect fifth is 7 semitones (e.g., C to G, or A to E).