Loading...

Skip to main content

🎵 A4 Reference Frequency Calculator

Calculate the required A4 reference frequency to achieve a target frequency for a specific note based on 12-tone equal temperament

Instructions: Select the target note and octave, input the desired frequency, and the system will calculate the required A4 reference frequency. This is useful for validating special tunings like 432Hz.
Required A4 Reference Frequency:
Based on 12-tone equal temperament | Suitable for 432Hz conversion validation

Frequency Chart

Interactive frequency chart showing musical notes and their frequencies in different tuning standards

Chart Settings

Musical Notes & Frequencies

Note Octave Frequency (Hz) Difference

How to Use Calculator

1. Select the musical note and octave

2. Choose your A4 reference frequency

3. View calculated frequency and comparisons

4. See adjacent notes for context

How to Use Chart

1. Select your preferred tuning standard

2. Choose the octave range to explore

3. Click "Update Chart" to generate table

4. Hover over rows to highlight frequencies

About Frequency Standards

440Hz: Modern concert pitch standard

432Hz: Natural tuning, 8Hz lower than A4

Benefits: 432Hz creates a more relaxed, natural sound