Pitch Finder
A4 = 440 Hz
Infinite-range frequency ↔ note converter. Convert Hz to musical notes or notes to Hz, with adjustable tuning, equal temperament, just intonation, interval tools, and harmonic series.
Advanced tuning options
Use 440 for standard tuning, 432 if you enjoy comment-section warfare.
Just intonation is key-dependent, so the key selector only appears there.
Type a frequency, coward.
Example: 440 gives you A4. Shocking stuff.
Interval Calculator
Compare two frequencies and get the ratio, cents difference, and approximate musical interval.
Harmonic Series Explorer
Enter a fundamental frequency and see its harmonic series with note names and cents offsets.
Hz2Note is a free frequency to note converter and note to frequency calculator for musicians, producers, singers, audio engineers, composers, and music theory nerds. It supports standard equal temperament, adjustable A4 reference tuning, just intonation by key, interval measurement in cents, and harmonic series exploration.