Shift a base frequency up or down by a number of semitones.
Each semitone multiplies the frequency by the twelfth root of two, so seven semitones give a perfect fifth ratio. Transposition tools and pitch correction work in semitones, and knowing the exact resulting frequency matters for tuning.
Semitone Shift
New freq = base x 2^(semitones/12)
New freq = base x 2^(semitones/12) Each semitone multiplies the frequency by the twelfth root of two, so seven semitones give a perfect fifth ratio.
Transposition tools and pitch correction work in semitones, and knowing the exact resulting frequency matters for tuning.
This calculator takes 2 inputs: Base frequency, Semitones. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.