Note Frequency Calculator
Find the exact frequency of any musical note. Play the tone and see the full chromatic scale.
440.00 Hz
Full Octave
About
Musical note frequencies follow the equal temperament system where each semitone is the 12th root of 2 apart. A4 = 440 Hz is the standard tuning reference. The formula is: f = A4 × 2^((n-49)/12), where n is the note number counting from C0.