Hz to Note Calculator

Formula

The formula to calculate the musical note from a given frequency is:

\[ \text{Note} = 12 \cdot \log_2 \left(\frac{f}{440}\right) + 49 \]

Where:

\( \text{Note} \) is the calculated musical note (MIDI number).
\( f \) is the frequency in Hertz (Hz).
\( \log_2 \) is the logarithm to base 2.
440 is the standard pitch frequency for the note A4.
49 is the MIDI number for the note A4.

Example

Let's say the frequency (\( f \)) is 493.88 Hz. Using the formula:

\[ \text{Note} = 12 \cdot \log_2 \left(\frac{493.88}{440}\right) + 49 \]

We get:

\[ \text{Note} = 12 \cdot \log_2 (1.122) + 49 \approx 51 \]

So, the musical note corresponding to 493.88 Hz is approximately MIDI number 51, which is the note B4.

What is Hz to Note?

Hz to Note is a conversion process used in music and sound engineering that translates frequency measurements (in Hertz or Hz) into musical notes. This is based on the standard pitch frequency, where the note A4 is set at 440 Hz. Each musical note corresponds to a particular frequency. For example, the note B4 corresponds to a frequency of approximately 493.88 Hz. This conversion is essential in tuning musical instruments, synthesizing sounds, and digital signal processing.