Note Frequency Chart
Equal-temperament frequency (Hz) for every note. Tap a cell to hear it.
Column numbers are octaves (A4 = 440 Hz reference). No sound? Tap the page once first.
How to use
- Tap a cell to play a sine tone at that pitch. Tap again or press "Stop tone" to stop.
- Change the concert pitch (e.g. A = 442 for many orchestras) and the whole chart recalculates.
- Standard guitar tuning is E2, A2, D3, G3, B3, E4.
The formula
In equal temperament, f = A4 × 2^((n − 69) / 12) where n is the MIDI note number (A4 = 69). Each semitone multiplies the frequency by 2^(1/12) ≈ 1.0595.
FAQ
- Is this a tuner?
- It doesn't analyse microphone input — it's more like a tuning fork that plays an exact reference pitch for tuning by ear.
- Is anything other than 440 Hz common?
- Orchestras often use 442–443 Hz; Baroque performance frequently uses 415 Hz.