United States calculator
Convert playback tempo change to pitch shift and back
Convert a playback-speed tempo change into semitones and cents, or apply a chosen pitch shift to predict the new tempo when speed and pitch remain linked.
BPM ratio • semitones • cents
Calculator inputs
Pitch and Tempo Calculator results
How this Pitch and Tempo Calculator works
When a recording is sped up or slowed down without time stretching, tempo and frequency change by the same ratio. Semitone shift equals 12 times the base-2 logarithm of that ratio.
Important: Modern time-stretching and pitch-shifting software can alter tempo and pitch independently. Use this only when playback speed links both quantities.
What assumptions should I verify?
Verify every entered quantity, rate, unit, product specification and local requirement before relying on the estimate. U.S. conventions are primary where location matters.
Is information sent anywhere?
No. Calculations run locally in the browser and this calculator sends no entered information to a remote service.