# Chord Transposer

URL: https://speedycalculator.com/calculators/other/chord-transposer/
Last updated: 2026-10-30

> The chord transposer moves any chord up or down by a chosen interval – from a minor second to an octave – and spells the new chord correctly, showing the original and transposed chord names and notes, a simpler enharmonic spelling when needed and the result on a keyboard.

## Inputs

- Root
- Chord form
- Transpose by
- Direction
- Spelling

## Results

- Transposed chord
- Transposed notes
- Transposed chord name
- Original chord
- Original notes
- Transposed by
- Number of notes
- Simpler spelling
- Transposed chord on a keyboard

## Formula

```
New root = old root moved by the interval (letter steps and semitones)
New chord = new root + the same chord formula
Up n semitones = down (12 − n) semitones, one octave higher
```

## Explanation

Transposing a chord means moving every note by the same interval so the chord keeps its quality: a major chord stays major, a dominant seventh stays a dominant seventh. Singers transpose songs to fit their range, guitarists use a capo, and horn players read parts written in another key – all of them need the same arithmetic.

The safe method is to transpose the root by the interval and then rebuild the chord from its formula. Counting only semitones can give awkward spellings: F major up a whole tone is G major, but A major up a tritone, spelled strictly as an augmented fourth, is D♯ major (D♯, F𝄪, A♯), which most people would rather read as E♭ major. The calculator gives the theoretical spelling and, if you prefer, simplifies awkward roots such as E♯, B♯, F♭, C♭ and double accidentals.

To transpose a whole song from one key to another, find the interval between the keys (C to D is a major second up) and transpose every chord by that interval – or use the music transposer for lists of notes.

### How to use the Chord Transposer

- **Root**
- **Chord form**
- **Transpose by**
- **Direction**
- **Spelling**

Everything is calculated in your browser, so results appear instantly and nothing you type is sent to a server.

### How it works

The root moves by the generic interval for the chosen number of semitones (for example 4 semitones = a major third = two letter names). The chord is rebuilt from the new root with the same formula, so all its notes are spelled consistently; with “simplify” an awkward root is respelled first.

### Worked example

Transpose **E major** (E, G♯, B) up a major second (2 semitones): a second moves the root one letter name, E → F, and two semitones above E is F♯, so the new root is F♯ and rebuilding 1–3–5 gives **F♯, A♯, C♯**. Moving E major up a tritone with strict spelling gives A♯ major (A♯, C𝄪, E♯); simplified, it is B♭ major (B♭, D, F).

### Interval cheat sheet for transposing

SemitonesShortIntervalJust ratio0P1Perfect unison1:11m2Minor second16:152M2Major second9:83m3Minor third6:54M3Major third5:45P4Perfect fourth4:36A4 / d5Tritone45:327P5Perfect fifth3:28m6Minor sixth8:59M6Major sixth5:310m7Minor seventh9:5 or 16:911M7Major seventh15:812P8Perfect octave2:1

## Worked example

Inputs — Root: E; Chord form: Major triad (C); Transpose by: Major second (2); Direction: Up; Spelling: Simplify awkward roots (E♯, B♯, F♭, C♭, 𝄪, 𝄫).

Results — **Transposed chord = F♯**; Transposed notes = F♯, A♯, C♯; Transposed chord name = F♯ major triad; Original chord = E (E major triad); Original notes = E, G♯, B; Transposed by = Major second up (2 semitones).

## Key terms

- **Transposition**: Moving music up or down by a constant interval.
- **Semitone**: The smallest step on a piano, one twelfth of an octave.
- **Enharmonic respelling**: Writing the same pitch with another letter name (D♯ = E♭).
- **Capo**: A clamp on a guitar neck that transposes all open chord shapes up.

## FAQ

**What is F major transposed up two semitones?**
G major (G, B, D).

**How do I transpose C minor from E♭ major to B♭ major?**
The keys are a perfect fifth apart (7 semitones up, or 5 down), so C minor becomes G minor.

**What is G7 transposed from C to D?**
Up a major second: A7 (A, C♯, E, G).

**Why do I sometimes get double sharps?**
Strict interval spelling keeps every letter consistent; D♯ major contains F𝄪. Choose “simplify” to get E♭ major instead.

**Is transposing up 7 semitones the same as down 5?**
Yes, apart from the octave: both give the same chord name.

**How does a capo relate to transposing?**
A capo on fret n raises every chord shape by n semitones – a G shape with a capo on 2 sounds as A.

**Does transposing change the chord type?**
No – the intervals inside the chord stay the same; only the root and the note names change.


## Sources

- [musictheory.net – Lessons (notes, intervals, chords, keys)](https://www.musictheory.net/lessons)
- [Open Music Theory (open textbook)](https://viva.pressbooks.pub/openmusictheory/)
- [Wikipedia – Transposition (music)](https://en.wikipedia.org/wiki/Transposition_(music))