Frequency to Note Converter

Convert between frequency (Hz) and musical notes with cents deviation

Reference Pitch (A4)

Frequency to Note

Note to Frequency

A4 =
440.00 Hz

Octave 4 Frequencies

Common Reference Frequencies

Understanding Musical Frequencies

Reference Pitch: The standard concert pitch sets A4 at 440 Hz. This is the reference point for tuning instruments. Different tuning standards have been used throughout history and across different musical traditions.

Cents: A cent is 1/100th of a semitone. Musicians use cents to measure small deviations from perfect pitch. Most people can detect differences of about 5-10 cents.

Octaves: Each octave doubles the frequency. For example, A4 (440 Hz) is one octave above A3 (220 Hz) and one octave below A5 (880 Hz).

Equal Temperament: This tool uses 12-tone equal temperament (12-TET), where each semitone has a frequency ratio of 2^(1/12) or approximately 1.0595.

Tip: Use this tool to verify your instrument tuning, analyze audio recordings, or explore the mathematical relationships between musical notes.