Musical Chord Frequency & Progression Calculator
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Calculate exact scientific pitch frequencies (Hz), musical note intervals, and MIDI numbers with interactive piano keyboard playback.
Select Root & Chord Quality
Constituent Note Frequencies
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Direct In-Browser Handoff
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Helpful Examples
C Major Triad (C4, E4, G4)
Frequencies: C4 (261.63 Hz), E4 (329.63 Hz), G4 (392.00 Hz).
Root: C, Type: MajorHow to Use the Musical Chord Frequency & Progression Calculator
Music theory chord engine and frequency analyzer. Explore Major, Minor, Dominant 7th, Diminished, and Suspended chord structures across all 12 musical keys with polyphonic Web Audio playback.
Privacy & Data Processing Notice
No user data leaves your browser. Computation is executed entirely on your device. We do not store, view, or transmit your inputs over our network. Your computation remains on your personal machine.
Frequently Asked Questions
How are note frequencies calculated?
Frequencies use standard A440 equal temperament tuning: f = 440 * 2^((n - 69) / 12) where n is the MIDI note number.
Can I play the chord notes simultaneously?
Yes, clicking 'Play Chord' fires polyphonic sine/triangle oscillators to play all triad and 7th chord voices together.
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