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Chord Note Finder Calculator

Work out chord note finder instantly with clear inputs, formula shown and shareable results.

About Chord Note Finder Calculator

Chords are defined as fixed semitone intervals above the root, so a major triad is 0, 4 and 7 semitones while a minor triad flattens the third to 3. Working in semitone intervals rather than letter names is what makes a chord shape transposable to any root without rethinking the theory.

Formulas

Chord construction

each note = root note transposed up by the chord's interval in semitones, modulo 12

Frequency

frequency = 440 x 2 ^ (semitones from A4 / 12)

Worked example

With the default values below, Chord Note Finder Calculator returns Notes in the chord of C - E - G. Change any input above and every figure here is recalculated in your browser.

Inputs used

Root noteone of C, C#, D, D#, E, F, F#, G, G#, A, A#, B
C
Chord typeone of Major, Minor, Dominant 7th, Major 7th, Minor 7th, Diminished, Augmented, Suspended 4th
Major

Results

Notes in the chord
C - E - G
Semitones above the root
0, 4, 7
Number of notes
3
Root frequency in the octave above middle C
261.626 Hz

Step by step

  1. 1Values used
  2. 2Chord construction
  3. 3Frequency
  4. 4Notes in the chord= C - E - G
  5. 5Semitones above the root= 0, 4, 7
  6. 6Number of notes= 3
  7. 7Root frequency in the octave above middle C= 261.626 Hz

Assumptions and limits

  • The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 3 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Chord Note Finder figure worked out?

each note = root note transposed up by the chord's interval in semitones, modulo 12. Chords are defined as fixed semitone intervals above the root, so a major triad is 0, 4 and 7 semitones while a minor triad flattens the third to 3.

Why does this matter?

Working in semitone intervals rather than letter names is what makes a chord shape transposable to any root without rethinking the theory.

What do I need to enter?

Enter root note, chord type. The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.

Related Calculators

Chord Note Finder Calculator – Calculate Notes in the chord