Shift any frequency up or down by a number of semitones and read the new pitch. Enter a starting frequency in hertz and how many semitones to move, positive to go higher or negative to go lower, and this tool multiplies by the twelfth root of two for each step. That ratio, roughly 1.0595, is the constant that separates every adjacent note in equal temperament, so twelve steps always double the frequency into the next octave. This is exactly what a pitch shifter, a capo, or a synth transpose control does under the hood. Use it to work out where a sample lands after pitching, to find the frequency a fixed number of frets up a string, or to check the ratio between two tones. The exact multiplication factor for your semitone amount is shown alongside the result.
It multiplies the starting frequency by the twelfth root of two raised to the number of semitones, which is the 12 tone equal temperament ratio.
Yes, enter a negative number of semitones to lower the pitch and a positive number to raise it.
Yes, twelve semitones make one octave, which doubles the frequency.
Shift any frequency up or down by a number of semitones and read the new pitch. Enter a starting frequency in hertz and how many semitones to move, positive to go higher or negative to go lower, and this tool multiplies by the twelfth root of two for each step.
Yes. Semitone Frequency Calculator is completely free, with no sign-up and no usage limits.
Yes. Semitone Frequency Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Semitone Frequency Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.