Capo Positions Calculator For Guitar

Capolator is a free capo position calculator and guitar chord transposer built by a guitarist who wanted total freedom to explore any key, scale, and chord progression whenever the moment struck. Enter any key, mode, and progression to instantly see every CAGED position across the fretboard. Whether you're transposing guitar chords to a new key, finding capo positions that fit your hand better, or seeing how the CAGED system connects shapes across the neck, Capolator shows you exactly what you're playing and why. It supports all seven diatonic modes, interactive 12 and 24-fret fretboard visualization, and installs as an app on any device.

Building Your Progression

Choose your original key and Section 2 instantly updates to show every diatonic chord in that key
If your chosen key has a cleaner enharmonic spelling, Section 2 will reflect that automatically. For example, A# Major and its modes will display Bb chords since Bb is the more conventional spelling. The results will note any adjustment made
Select Major, Minor, or any of the 5 other modes: Dorian, Phrygian, Lydian, Mixolydian, or Locrian. Presets update automatically to match the selected mode
Tap any chord numeral to add it to your progression. Your chords appear in the slots below, color coded as you build
Fine-tune any chord before adding: apply flat/sharp, change quality (maj/min/dim/aug), or add extensions like 7, maj7, sus2, sus4, and add9
Type any chord directly into the free-text field for anything outside the builder. Try bIII, #IVdim, Vmaj7 and more
Blue chords fit the key. Purple chords are borrowed or outside it. Both are fully supported
Use Clear to start over, or remove any chord by tapping the × on its slot
Choose your target key and tap Show New Positions

Reading the Results

A small ● dot on a card means the key spelling was adjusted to avoid duplicate note names or problem notes like Cb or Fb. Tap it to see what changed. In a small number of keys no clean spelling exists and the app will use your original choice as entered
Results show all 5 CAGED positions for your progression in the new key, sorted lowest capo position to highest
Dimmed cards are high-fret positions. Still valid, just less practical for most players
Tap any card header to see the full scale of the new key on the fretboard. Root notes light up in gold
Tap any chord inside a card to zoom in. Root notes show in white, chord tones (3rd and 5th) illuminate in green, borrowed tones in purple
Each chord box shows the sounding chord in white and the shape to play in red below it. Use the red shape with your capo to sound the chord above it
Toggle between 12-fret and full 24-fret neck view
Switch between light and dark mode anytime using the icon at the top
Add to your home screen for instant access