443 Hz: a bright orchestral tuning pitch

A4 = 443 Hz sits at the top of the 442–443 band many European orchestras tune in. It is a convention for brightness, not a standard, and it is the same pitch inflation that led to standardisation in the first place.

• Open the tuner at A = 443 Hz

Which note 443 Hz is at other reference pitches

“In tune” depends on what A4 is tuned to, so the same frequency is a slightly different distance from the nearest note in each tuning.

An octave of notes at A4 = 443 Hz

Middle C to the C above, tuned to this reference, beside the same notes at the 440 standard.

Octaves of 443 Hz

Doubling a frequency raises it an octave and halving lowers it one, so these all have the same note name and the same offset from it.

• 55.38 Hz · A1
• 110.75 Hz · A2
• 221.50 Hz · A3
• 886.00 Hz · A5
• 1772.0 Hz · A6
• 3544.0 Hz · A7

Harmonics of 443 Hz

A real instrument playing 443 Hz also sounds whole-number multiples of it. The first eight, and the notes they fall nearest:

Period and wavelength

One cycle of 443 Hz lasts 2.257 milliseconds; in air at 20 °C, where sound travels at about 343 metres a second, one wavelength is 77.4 centimetres.

Convert another frequency

Or hold 443 Hz as a steady tone, sweep from it, or beat it against a second tone in the tone generator. The note frequency chart lists every note from C0 to B8.

Frequently asked questions

Related frequencies

• 442 Hz — the orchestral tuning pitch
• 440 Hz — the standard tuning pitch
• 444 Hz — a bright tuning pitch