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Music Scale Calculator
Choose a root note, scale type, and octave to see the notes and frequencies of that scale.
How scales are built
A musical scale is a set of notes built from a root note using a fixed pattern of semitone steps — for example, the major scale uses the pattern 0-2-4-5-7-9-11 semitones above the root. This calculator applies that pattern to your chosen root note and looks up each note’s frequency using the standard 12-tone equal temperament formula, with A4 = 440 Hz as the reference pitch.
Frequencies are calculated as f = 440 × 2^((n−9)/12), where n is the note’s semitone position relative to A in the chosen octave.
Last reviewed August 2026