Simplify Key Changes
- Instantly find the right chords in any key
- Say goodbye to capo confusion and awkward transposing
- Stay in the moment when the key changes mid-set
Make Theory Click (for Everyone)
- Roman Numerals or Nashville—choose your language
- Show your team how chords connect—not just what to play
- From “What's a 2- chord?” to “I’ve got this” in seconds
Write (and Lead) with Confidence
- Play from feeling, not just formulas
- Help your team sound tighter—and feel freer
- Confidence sounds like worship, not worry
Why We Built This
We’re a small family in a small town, chasing a big idea:
That theory isn't the point — the song inside you is.
So we built Chordii: a hands-on tool that disappears when inspiration hits, and reappears the moment you need clarity.
No clutter. No pressure. Just movement, emotion, and a better way to write what’s already in your heart.
The music’s already in you. Chordii just helps bring it out.
Choose the one that moves you.
Roman
Classic feel. Deep understanding.
- Uses Roman numerals (I, ii, IV...) for a traditional approach
- Ideal for teaching, learning, and understanding harmonic function
- Perfect for theory students, educators, and notation-focused musicians
Nashville
Modern speed. Instant clarity.
- Uses Nashville Numbers (1, 2–, 4...) for quick, key-flexible thinking
- Speaks the language of worship leaders, session players, and bands
- Great for fast transposing and mid-set key changes
Nashville+
Creative tools. Emotional depth.
- Adds chord flavors (sus, 7th, add9…) and tone mapping to the front
- Replaces the back’s progressions with a mood-based movement chart
- Built for songwriters, arrangers, and those chasing deeper emotion
Roman and Nashville are identical—same chords, same progressions—just shown in different number systems. Nashville+ builds on that with chord flavors on the front and a songwriting-focused movement chart on the back. It’s the natural next step for musicians ready to dive deeper into emotion, structure, and sound.
From Idea to Song in Four Steps
Start anywhere on the wheel. Whether you're matching a singer’s range or landing in your creative comfort zone, Chordii shows every note and chord in your key—instantly.
As you spin, Chordii reveals the chords that naturally belong together.
No more guesswork—just clear, connected harmony that makes writing feel effortless.
Flip Chordii over to find what your song feels like.
Our original versions offer proven chord progressions built around emotion.
The Nashville+ digs even deeper—mapping out chord flavors, tensions, and how they move within a song.
Whatever you’re writing, there’s a way forward.
With the theory handled, your hands—and heart—take over.
No screens. No distractions. Just you, your instrument, and the music you were meant to make.
Chordii (kor-dee) is music theory made for how musicians actually play.
Find your key, your chords, and your movement—fast.
No screens. No apps. No overthinking.
Just a hands-on wheel that helps you stay locked into the music you’re called to make—whether you’re leading worship, writing alone, or teaching others.
The Wheel That Moves With You
Every Chordii is printed on soft-touch cardstock and features a rotating wheel built on the Circle of Fifths—letting you move through all 15 major keys with a simple spin.
No apps. No scrolling. Just real music theory, in motion.
Whether you're leading worship, writing late at night, or teaching a new player—Chordii moves with you, wherever your next song begins.
Built Slow. On Purpose.
Chordii wasn’t built to just teach theory—it was built to feel like music.
That’s why we chose a soft-touch paper finish. That’s why we assemble every wheel by hand.
It takes more time, sure. But we believe it’s worth it—because the tools you use should support your creativity, not get in the way of it.
You wouldn’t write your best song on a plastic guitar. Chordii stays paper for the same reason great instruments are made of wood: feel matters.
Questions? We've got you covered.
All three versions use the same wheel design to show you the chords in every major key—but the way the info is displayed changes:
- Roman uses classical Roman numerals (I, ii, IV…)
- Nashville uses modern numbers (1, 2–, 4…)
Aside from the numbering system, Roman and Nashville are identical—both include the same chord progressions and emotional moods on the back.
- Nashville+ adds more: extended chord flavors (sus, 7ths, add9s), a new system for finding chord notes, and a new back chart that maps movement, emotion, and songwriting intent—instead of standard progressions.
Roman uses classical Roman numerals (I, ii, IV...) and Nashville uses numbers (1, 2–, 4...) to describe chords. Same wheel—just a different language.
A mood and movement chart that maps feelings, chord flavors, and writing intent.
Nope. You’ll start using it in minutes—and it grows with you.
Chordii is made from thick, 24pt premium cardstock with a soft-touch finish—lightweight, durable, and satisfying in the hands.
We chose paper on purpose—like choosing a wood guitar over a plastic one. It’s warmer, more tactile, and reminds you this tool was made by musicians, not machines.
Built to last. Designed to move with you.
We keep it simple: you pay what it costs us to ship — nothing more. For most countries, taxes and duties are collected at checkout, so your order shows up with no surprises.
If you don’t see taxes or duties listed at checkout, your country may require you to pay them when your package arrives. (Yeah, we wish it were more consistent too.)
We’ll always use the most affordable shipping options available — no markups, no hidden costs from us. Just music theory tools delivered fair and square.
We’d love to — but we’d have to raise our prices, and that’s not how we roll. Instead, you pay exactly what it costs us to ship your order — no markups, no fluff, no hidden fees.
We’d rather keep prices low, offer bulk discounts to teams and schools, and put our resources into supporting musicians — instead of playing the free-shipping-but-you-paid-for-it-anyway game.
We offer a 30-day satisfaction guarantee. If you're not completely satisfied with your Chordii, return it in its original condition for a full refund, minus shipping costs.
Chordii requires minimal maintenance. Simply keep it clean and dry, and avoid exposing it to extreme temperatures or direct sunlight for prolonged periods.
Yes, we do! If you’re interested in becoming an affiliate, simply shoot us an email (andrew@chordii.com or ian@chordii.com) and we’ll get you set up. Our mission is to help others grow, and we’d love to support you in making money doing what you’re passionate about. We're always excited to partner with like-minded individuals!
Contact us (andrew@chordii.com) and we'll get back to you within 24 hours.