A major third is 4 semitones.
A major third is an interval spanning 4 semitones (half steps) between two notes. For example, from C to E is a major third, as is from F to A. This interval is fundamental in major chords and scales, consisting of two whole steps.
Major Third vs. Minor Third
- Major third: 4 semitones (e.g., C to E)
- Minor third: 3 semitones (e.g., C to Eb)
Examples of Major Thirds
| Root Note | Major Third | Interval |
|---|---|---|
| C | E | C to E = 4 semitones |
| F | A | F to A = 4 semitones |
| G | B | G to B = 4 semitones |
Role in Music Theory
The major third is a key interval in major chords, scales, and harmony. It defines the bright, consonant sound of major tonality and is essential for building major triads (root, major third, perfect fifth).