Secondary Dominant Calculator
Calculate all secondary dominant chords ($V/x, V^7/x$), tritone substitutions ($subV/x$), and secondary leading-tone chords ($vii^\circ7/x$) for any diatonic key and scale mode. Analyze custom progressions, preview audio resolutions, and export MIDI files.
Key Secondary Dominant Table (C Major)
Click any row to load resolution audio preview and visualizer diagrams:
| Target Degree | Target Chord | Secondary Dominant ($V^7/x$) | Tritone Sub ($subV^7/x$) | Sec. Leading-Tone ($vii^\circ7/x$) | Notes ($V^7/x$) |
|---|
Export & Sharing Options
Download a standard MIDI file (.mid) with VLQ delta encoding to drag into Ableton, Logic, FL Studio, or Pro Tools.
What Is a Secondary Dominant Calculator?
A Secondary Dominant Calculator helps musicians identify applied dominant chords that temporarily emphasize another diatonic chord within a key. Rather than changing the overall key, secondary dominants create a brief sense of tonicization that adds harmonic tension, stronger resolutions, and more interesting chord progressions. This tool automatically calculates V/x, V7/x, tritone substitutions (subV/x), and secondary leading-tone chords (vii°7/x) for your selected key and scale mode.
Unlike manually working through harmony rules, the calculator instantly displays every applicable secondary dominant, explains its target resolution, and visualizes the notes on both a piano keyboard and guitar fretboard. It also analyzes custom chord progressions, allowing you to quickly identify applied dominants that may otherwise be difficult to spot.
If you’re new to the concept, our guide to secondary dominant chords explains the theory behind temporary tonicization before you begin experimenting with the calculator.
How to Use the Secondary Dominant Calculator
Getting started only takes a few steps:
- Select the root key from the available key signatures.
- Choose a scale mode such as Major, Natural Minor, Dorian, Mixolydian, Harmonic Minor, or another supported mode.
- Generate the secondary dominant matrix.
- Review every calculated V/x, V7/x, subV/x, and vii°7/x chord.
- Optionally paste or type your own chord progression to analyze applied dominants automatically.
- Listen to each dominant-to-target resolution using the built-in audio preview.
- Explore the highlighted piano keyboard or generated guitar chord diagrams.
- Export the results as a Standard MIDI file for use in compatible DAWs.
If you are unsure which key your progression belongs to, the Key Signature Calculator can help identify the appropriate tonal center before analyzing secondary dominants.
Understanding Your Results
The calculator organizes each target chord together with its related applied dominant chords, making it much easier to understand functional harmony.
| Result | Meaning |
|---|---|
| V/x | Dominant chord resolving to a specific diatonic chord |
| V7/x | Dominant seventh chord with stronger resolution tendency |
| subV/x | Tritone substitution that provides a chromatic alternative |
| vii°7/x | Secondary leading-tone diminished seventh chord resolving to the same target |
When you analyze a custom progression, the calculator highlights where secondary dominants occur and identifies the chord each one resolves toward. This makes it useful for studying jazz standards, classical harmony, contemporary worship music, pop songwriting, and film scoring.
Many musicians also find it helpful to visualize dominant movement alongside the Circle of Fifths Calculator, since many secondary dominant relationships follow descending fifth motion.
Why Musicians Use Secondary Dominants
Secondary dominants allow composers and arrangers to introduce temporary harmonic color without permanently modulating to another key. Because they momentarily strengthen the pull toward a target chord, they are widely used across classical, jazz, blues, gospel, film music, and modern popular styles.
Common applications include:
- Creating stronger harmonic tension.
- Connecting chords more smoothly.
- Making progressions sound less repetitive.
- Adding richer jazz harmony.
- Improving arrangements and reharmonizations.
- Understanding functional harmony more deeply.
Since the calculator supports both traditional secondary dominants and tritone substitutions, it can also serve as a practical songwriting and arranging reference rather than only a theory study tool.
Voice Leading and Harmonic Resolution
One of the most valuable features of the calculator is its built-in voice-leading explanation. Instead of simply listing chords, it explains how individual notes naturally resolve between the dominant and target chord.
The explanation panel illustrates concepts such as:
- Temporary leading-tone resolution.
- Seventh resolving downward by step.
- Root movement by descending fifths.
- Smooth movement between common chord tones.
For an even deeper understanding of chord movement, you can compare the results with the Voice Leading Calculator or experiment with different voicings using the Chord Inversion Calculator.
Audio Preview and MIDI Export
The calculator includes browser-based audio playback so you can hear how each secondary dominant resolves into its destination chord. Four instrument timbres are available, allowing you to compare the same harmonic movement using different sounds.
When you’re satisfied with a progression, you can export it as a Standard MIDI File (.mid). MIDI generation happens entirely within your browser, making it easy to drag the exported file into most digital audio workstations for further arranging or orchestration.
Please note that audio playback requires a modern browser that supports the Web Audio API.
Frequently Asked Questions
What is a secondary dominant?
A secondary dominant is a dominant chord that temporarily functions as the dominant of another diatonic chord rather than the tonic, creating a brief sense of tonicization before resolving.
What does V/V mean?
V/V means “the dominant of the dominant.” For example, in C major the dominant is G, so V/V is D (or D7), which naturally resolves to G.
What is a tritone substitution?
A tritone substitution replaces a dominant seventh chord with another dominant chord located a tritone away. Both chords share the same tritone interval and often resolve to the same target chord while creating a different chromatic sound.
Can I analyze my own chord progression?
Yes. The progression analyzer identifies secondary dominants within your progression and indicates the chord each one is expected to resolve toward.
Does the calculator work for minor keys?
Yes. In addition to Major, the calculator supports Natural Minor, Harmonic Minor, Melodic Minor, and several modal scales, allowing you to explore applied dominants across different tonal systems.