Piano Note Frequencies: What Frequency Is Each Note?
Notes repeat every octave, but their frequencies double. This calculator works out the exact pitch of any note you name.
What is the Piano Note Frequencies?
Every piano note has a precise frequency, doubling each octave. Enter a note name and octave and this tool calculates the frequency from the A4 equals 440 Hz standard, which is useful for tuning, synthesis, and ear training.
How to use it
- Enter your values in the fields provided.
- Click Calculate Frequency.
- Read the result and adjust an input if you want a different outcome.
Worked example
A4 is 440 Hz by standard, C4 (middle C) is about 261.63 Hz, and A5 is 880 Hz.
What frequency is middle C?
Middle C is C4, and from the A4 equals 440 Hz standard it works out to about 261.63 Hz.
Frequently asked questions
What do I enter to get a result?
Fill in every field with your own numbers or choices, then run the tool. Empty number fields count as zero, so check them before you trust the output.
Can I reuse this result elsewhere?
Yes. The result is calculated in your browser from the values you entered, so you can copy the numbers into your own notes or plan.