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Note to Frequency Calculator

Calculate the exact frequency in Hz for any musical note. Select a note and octave to find its frequency. Supports different tuning standards.

C4

261.63 Hz

MIDI Note:
60
Wavelength:
1.31 m
Period:
3.82 ms
Octave Below:
130.81 Hz

Same Note Across All Octaves

Note Frequency (Hz) MIDI Description

How to Use the Note to Frequency Calculator

Select a musical note and octave using the interactive buttons. Adjust the A4 reference frequency if needed for alternate tuning standards like 432 Hz or 442 Hz. The calculator instantly converts the selected note into its corresponding frequency in hertz (Hz) and provides related data such as MIDI number, wavelength, and period.

  • Supports standard 12-TET (twelve-tone equal temperament) tuning.
  • Useful for music production, instrument tuning, MIDI programming, and sound design.
  • Provides full octave reference table for learning pitch relationships.

Applications of Note to Frequency Conversion

Converting musical notes to precise frequencies is critical in digital audio workstations (DAWs), synthesizers, and MIDI controllers. It allows musicians and sound engineers to accurately tune instruments, design sine waves, oscillators, and filters, and create harmonically correct audio sequences.

  • Audio synthesis and waveform generation.
  • Electronic music production and MIDI sequencing.
  • Instrument tuning for pianos, guitars, and orchestral instruments.
  • Acoustic research and sound engineering projects.

Reference: Common Note Frequencies

Below is a reference chart showing the frequencies (Hz) for common musical notes across octaves, including their MIDI numbers and pitch classification. Useful for sound analysis, MIDI programming, and audio tuning.

Note Octave Frequency (Hz) MIDI Number
C 4 261.63 60
C# / Db 4 277.18 61
D 4 293.66 62
D# / Eb 4 311.13 63
E 4 329.63 64
F 4 349.23 65
F# / Gb 4 369.99 66
G 4 392.00 67
G# / Ab 4 415.30 68
A 4 440.00 69
A# / Bb 4 466.16 70
B 4 493.88 71

Advanced Concepts in Note to Frequency

Understanding the relationship between notes and frequencies is crucial for music theory, acoustic analysis, and electronic sound design. Notes are quantified in MIDI values, while frequencies define the physical oscillations per second (Hz). Knowledge of semitones, cents, octaves, and pitch ratios allows precise control over harmonics and tuning.

  • Cents: Fine measurement between a note and its exact frequency.
  • Semitones: 12 equal divisions per octave in 12-TET tuning.
  • Pitch Classes: Notes grouped by name regardless of octave (C, C#, D, etc.).
  • Frequency Ratios: Doubling frequency raises pitch by one octave, 2^(1/12) per semitone.

The Formula

Frequency Calculation:
f = 440 × 2^((n-69)/12)

Where f is the frequency in Hz and n is the MIDI note number (A4 = 69).

Alternative Formula:
f = 440 × 2^((semitones from A4)/12)

Calculate semitones from A4, then apply the power of 2 relationship.

Key Relationships

  • Octave: Doubling the frequency raises pitch by one octave
  • Semitone: Multiply by 2^(1/12) ≈ 1.0595 for one semitone up
  • Fifth: Multiply by 2^(7/12) ≈ 1.498 for a perfect fifth

To convert a musical note to frequency, use the formula f = 440 × 2^((n-69)/12), where n is the MIDI note number. This calculator instantly gives accurate results for note to frequency conversion in hertz, charts, or tables.

Yes. The note to frequency calculator provides exact MIDI note numbers and their corresponding frequencies in hertz. Use it for MIDI note to frequency conversion, DAW programming, synthesizer tuning, pitch to frequency conversion, and musical note frequency charts for accurate results.

Different music styles and production setups use alternative tunings like 432 Hz, 442 Hz, or 444 Hz. Changing the A4 reference in this note to frequency converter ensures accurate musical note to hertz conversion, correct pitch, and precise frequency calculations for charts or tables.

A note to frequency chart or table lists musical notes alongside their exact frequencies in hertz. It is used for quick reference, musical note to frequency conversion, MIDI note to frequency lookup, and as a guide for tuning instruments or synthesizers accurately.

The note to frequency calculator converts any musical note into its exact frequency in hertz, supporting MIDI programming, pitch to frequency conversion, synthesizer tuning, waveform design, and generating accurate musical note to frequency charts or tables for production workflows.