Musical frequency (Hertz) calculator

Give frequency in Hertz

Frequency Hz KHz

Tuning A4 = 415 Hz (Baroque pitch) A4 = 432 Hz (Verdi's A) A4 = 435 Hz (French 1800s) A4 = 440 Hz (ISO standard) A4 = 444 Hz (European alternative) A4 = 466 Hz (Chorton pitch)

Temperament Just/pure intonation (whole number ratios) Equal temperament (2 ^ ¹/12 based) - standard

Calculate frequency!

Frequency Calculation

Hertz

Cycles per second

440 Hz

Cycle length

seconds/cycle

2.27 msec

Wavelength

Speed of sound = 343 m/s (20 °C, air)

0.78 m

Note

Tuning: A₄ = 440 Hz

A4

Deviation

perfect A4 = 440 Hz

0 semitones

On a 88-key piano

References

Scales => frequencies

A440

Hertz

Semitone

Speed of Sound

Just Temperament

Equal Temperament