Semitone Calculator

Convert between frequencies and semitones. Musical intervals.

Frequencies

Frequency 1 (Start)

Hertz (Hz)

Frequency 2 (Target)

Hertz (Hz)

Interval

Distance1.00Semitones

Cents100.01/100th of a semitone

Frequency Ratio1.0595

About this calculator

Overview

Semitones = 12 × log2(f2/f1). Each octave = 12 semitones. A440 = 440 Hz.

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Pro Tips

Fun Facts

Formula: Semitones = 12 × log₂(f2/f1)