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Chord: Notes:
Selection mode:
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Select a chord
String: Fret: Note:
Chord: Tab: 000000 Notes:

Select a chord
Select a key
Notes in key
1 2 3 4 5 6 7
Chords in key
I ii iii IV V vi vii°
i ii° III iv v VI VII
Key Signature
Notes on Guitar
String: Fret: Note:

Chord Progression Builder (triads)
Power Chord


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Power Chord
Power Chord is a chord finder and explorer for piano and guitar with a chord progression builder and other music theory tools.

Chord Lookup

  • To look up the fingering positions of chords for piano or guitar click the buttons in the "Select a chord" section.
  • Select the chord name, the quality (Major, minor, etc) and inversion (R for root, 1 for first, 2 for second, etc).
  • The fingering positions will be shown on the keyboard or fretboard.
  • The tonic, or root note, will be shown in green.

Reverse Chord Lookup

  • Select and deselect multiple keys/frets on the keyboard/fretboard by clicking on them.
  • If there is a chord that matches the selections it is displayed under the keyboard/ fretboard in the Chord field.
  • Click the "Clear Selections" button to clear all of the selections.
  • On the guitar you can open or mute a string by clicking above the nut at the top of the fretboard. Click once to open the string, again to mute it.

Piano Selection Mode

  • In the piano view you can choose a selection mode of Single Note, Major, minor, 7th, etc.
  • When a chord quality is selected it will show all of the keys of that chord as you hover over the keyboard.
  • When you click the keyboard it will select all of the notes in the chord.

Music Theory Tools

  • You can easily find all of the notes and chords for any key in the Theory tab.
  • Select the key and quality and it will show the associated notes and chords below.
  • The chord's roman numerals are also shown below the chord names.

Chord Progressions

  • Use the Chord Progression Builder in the Theory tab to build chord progressions. The chords available are all triads. It uses basic chord progressions rules that determine the best chords to follow another chord. Use it to help when writing a song, or trying to figure out the chords for a song, or to help transpose chords.
  • First select a key and major or minor (natural minor scale is used).
  • Select the first chord from the dropdown selector and click Add.
  • The dropdown list will be updated to show only those chords that should follow the last chord.
  • Use the Delete button to delete the last chord, or Clear to reset the progression.
  • To transpose the chords simply select a different key and the chords will be updated.
  • To see how the progression sounds click the Play button to play it.
  • Adjust the speed of playback by changing the beats per minute.
Power Chord


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