Complete note frequency chart — all octaves
This chart lists every standard musical note from C0 (16.35 Hz) to B8 (7902 Hz), along with the MIDI note number and approximate wavelength in air at 20°C (speed of sound 343 m/s). Click any row or the play button to hear the note as a sine wave.
The reference pitch A4=440 Hz is the international standard, but you can adjust it above. Orchestras often use A4=442 Hz. Early music groups may use A4=415 Hz (one semitone lower). The entire table recalculates instantly when you change the reference.
What is the frequency range of human hearing?
Most adults can hear from roughly 20 Hz to 20,000 Hz. Musical instruments typically span from about 27.5 Hz (lowest piano note, A0) to around 4186 Hz (highest piano note, C8). The fundamental frequency of the human voice in speech is typically 85–255 Hz.
Why do note frequencies double every octave?
Doubling the frequency produces a note that sounds like the same pitch one octave higher. This is because our auditory system perceives frequency ratios, not absolute differences. A4 is 440 Hz; A5 is 880 Hz; A3 is 220 Hz. The 12 semitones between octaves are equally spaced on a logarithmic scale, each a factor of the 12th root of 2 (approximately 1.0595) apart.