Frequency Note Converter

How It Works

In equal temperament tuning (A4 = 440 Hz), each semitone multiplies the frequency by 2^(1/12) ≈ 1.05946. The formula: f = 440 × 2^(n/12) where n is semitones from A4. Cents measure fine pitch differences: 100 cents = 1 semitone. Human hearing can detect ~5 cents. The harmonic series (integer multiples of the fundamental) defines timbre — the 2nd harmonic is an octave above, the 3rd is an octave + fifth, the 5th is two octaves + major third. Knowing harmonics helps identify resonances and feedback frequencies.