Key Transposition Calculator

Transpose music from one key to another. Find the target key, interval name, capo position, and common transposition uses.

Inputs

Source Key

Semitones to Transpose

Tab to move between fields

Results

Target Key

IntervalPerfect 4th (P4)

Common UsePerfect fourth — common for guitar capo

Guitar Capo Fret5

Source Key SignatureNo sharps or flats

Target Key Signature1 flat(s)

How to Use This Calculator

Enter Source Key and Semitones to Transpose.
Review the Target Key result.
Use Interval and Common Use to inform your decision.

What each input means

Source Key: The original key of the music you want to transpose.
Semitones to Transpose: Number of semitones to shift. Positive = up, negative = down.

How this is calculated

Worked example, using the default values

Identify Input Parameters
Source Key = 0, Semitones to Transpose = 5 = 2 input(s) provided
Calculate Target Key
F = F
Calculate Interval
Interval
Perfect 4th (P4) = Perfect 4th (P4)
Calculate Common Use
Common Use
Perfect fourth — common for guitar capo = Perfect fourth — common for guitar capo

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