Free online Hz to Note Converter – Instantly convert frequencies (Hz) to musical notes (A4, C#5) and vice versa. Includes cents deviation, note chart & tuning reference.
This tool helps you:
- Convert Hz to note values (e.g., 440 Hz → A4)
- Convert notes to Hz (e.g., C4 → 261.63 Hz)
- Understand pitch deviations in cents
How to Use the Hz to Note Converter
- Hz to Note Conversion
- Enter a frequency (e.g.,
440) in the input field. - Click Convert to see the corresponding note (e.g.,
A4). - The result also shows cents deviation from perfect pitch.
- Enter a frequency (e.g.,
- Note to Hz Conversion
- Switch to Note → Hz mode.
- Enter a note (e.g.,
C#5orA4). - Click Convert to get the exact frequency in Hz.
Hz to Note Chart (Standard Frequencies)
Here’s a quick reference for common musical notes and their frequencies:
| Note | Frequency (Hz) |
|---|---|
| C4 (Middle C) | 261.63 |
| C#4/Db4 | 277.18 |
| D4 | 293.66 |
| D#4/Eb4 | 311.13 |
| E4 | 329.63 |
| F4 | 349.23 |
| F#4/Gb4 | 369.99 |
| G4 | 392.00 |
| G#4/Ab4 | 415.30 |
| A4 | 440.00 |
| A#4/Bb4 | 466.16 |
| B4 | 493.88 |
| C5 | 523.25 |
(This chart follows A4 = 440 Hz standard tuning.)
FAQs
1. What note does 440 Hz correspond to?
440 Hz corresponds to A4 (the A above middle C), which is the standard tuning reference in music.
2. How accurate is the Hz to Note Converter?
Our tool calculates the nearest note and shows any pitch deviation in cents (100 cents = 1 semitone).
3. Can I convert sharps and flats (e.g., C#5, Bb4)?
Yes! In Note to Hz mode, enter notes like C#5 or Bb4, and the converter will return the exact frequency.
4. Why do some frequencies show cents deviation?
If a frequency doesn’t perfectly match a note in equal temperament tuning, the tool shows how many cents it’s off by (e.g., +12 cents means slightly sharp).
5. What’s the formula for converting Hz to notes?
The formula is based on A4 = 440 Hz and equal temperament:
Why Use an Online Hz to Note Converter?
- Musicians: Quickly check tuning or transcribe frequencies.
- Audio Engineers: Match frequencies to musical notes in mixing/mastering.
- Students & Teachers: Learn the relationship between pitch and frequency.
Our Hz to Note Converter is free, accurate, and works in real-time—bookmark it for easy access!
Conclusion
Whether you need to convert Hz to note values or find the frequency of a musical note, our tool provides instant results. Use the Hz to Note Chart for quick reference and explore the science of sound with ease.
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