Turn a raw frequency in hertz into a musical note name. Type any pitch and this tool finds the nearest note in equal temperament, tells you its octave, and reports how many cents sharp or flat the frequency is compared to that note. It works by taking the base two logarithm of your frequency over the A4 reference, scaling by twelve to get semitones, then rounding to the closest note. The cents figure shows exactly how far off you are, which is how a tuner decides whether a string is in tune. You can adjust the A4 reference from 440 Hz to any concert pitch you use. This is useful for identifying a hum, matching a sample to a key, checking analyzer readings, or figuring out what note a sine wave or drone actually is.
It returns the closest musical note and octave and how many cents sharp or flat the pitch sits from that note.
Cents show how far off the exact note you are, where 100 cents equals a semitone, so a small cents value means the pitch is nearly in tune.
It maps frequencies against equal temperament with A4 at 440 Hz.
Turn a raw frequency in hertz into a musical note name. Type any pitch and this tool finds the nearest note in equal temperament, tells you its octave, and reports how many cents sharp or flat the frequency is compared to that note.
Yes. Frequency to Note Converter is completely free, with no sign-up and no usage limits.
Yes. Frequency to Note Converter runs in any modern web browser. There is nothing to download or install.
Yes. Frequency to Note Converter runs entirely on your device in your browser, so nothing you enter is uploaded to a server.