Find the musical interval in semitones and cents between two pitches.
The ratio of the two frequencies is turned into an equal-tempered distance, where twelve hundred cents span one octave. Interval distance determines harmony, so comparing two tones in cents reveals if they sit on a clean scale or a detuned gap.
Musical Interval
Cents = log2(upper / lower) x 1200
Cents = log2(upper / lower) x 1200 The ratio of the two frequencies is turned into an equal-tempered distance, where twelve hundred cents span one octave.
Interval distance determines harmony, so comparing two tones in cents reveals if they sit on a clean scale or a detuned gap.
This calculator takes 2 inputs: Lower frequency, Upper frequency. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.