Calculadora de Acordes

The Chord Calculator is an online tool that shows the semitones of each degree of a chord based on the root note. Simply select the root note (C, D, E, etc.) and the chord type (major, minor, dominant seventh) to get the list of notes that make up the chord. The calculation is done by adding intervals in semitones to the root, using the 12-note equal temperament system. For example, a major chord consists of the root, plus 4 semitones (major third) and 7 semitones (perfect fifth).

How it works: the tool stores the distance in semitones for each degree of common chord types. For a major chord, the distances are 0, 4, and 7 semitones; for minor, 0, 3, and 7; for dominant seventh, 0, 4, 7, and 10. When you select the root, the system calculates the corresponding notes by moving through the chromatic cycle. The result is displayed in chord notation (e.g., C, E, G for C major) and as note names.

Use this calculator when you need to build chords for composing, playing, or understanding the harmonic structure of a song. It is useful for beginner musicians learning music theory, composers exploring different sounds, or anyone who needs to quickly check the notes of a chord. Just enter the root and type, and the tool does the rest.

Common cautions: remember that the calculator uses equal temperament (12 semitones per octave), standard in Western music. Some chords may have enharmonic equivalents (same note with different names, like G# and A♭), and the tool shows the most common spelling. Additionally, chords with major or minor sevenths may not be available; check if the desired type is listed.