Quick answer: The Nashville Number System writes chords as numbers based on their position in the key instead of letter names. In the key of G, 1 = G, 4 = C, 5 = D and 6m = Em. Because the numbers stay the same in every key, a band can read one chart and play the song in any key without rewriting it.
The first time a worship leader handed me a chart that just said “1 – 5 – 6m – 4,” I panicked. Ten minutes later I wondered why nobody had shown me sooner. The Nashville Number System is one of the most useful skills a guitarist can learn, especially if you play in a church band or with other musicians. If you play worship music, start with our worship guitar guide to see how number charts fit into a full set.
What is the Nashville Number System?
It’s a shorthand for writing chord progressions using numbers. Each number stands for a note in the major scale of the song’s key. Session musicians in Nashville made it popular because it let them change keys on the spot to fit a singer. You can read the history of the Nashville Number System on Wikipedia.
How do the numbers work?
Start with the major scale of the key. Number each note 1 through 7. In a major key, the 2, 3 and 6 chords are naturally minor, and the 7 is diminished.
| Number | 1 | 2m | 3m | 4 | 5 | 6m | 7° |
|---|---|---|---|---|---|---|---|
| Key of C | C | Dm | Em | F | G | Am | B° |
| Key of D | D | Em | F#m | G | A | Bm | C#° |
| Key of E | E | F#m | G#m | A | B | C#m | D#° |
| Key of G | G | Am | Bm | C | D | Em | F#° |
| Key of A | A | Bm | C#m | D | E | F#m | G#° |
Many charts drop the “m” on the 2, 3 and 6 because they’re assumed minor. If you want to see why those chords are minor, the free lessons at musictheory.net cover major scales and chord building. Others write it every time. Ask your band which they use.
How do you read a Nashville number chart?
Here are the common symbols you’ll see:
- Each number = one measure (usually four beats) unless marked otherwise.
- Underlined or grouped numbers (for example 1 4) share one measure, split evenly.
- Slash chords like 1/3 mean the 1 chord with the 3rd note in the bass (G/B in the key of G).
- Diamond around a number means hit the chord and let it ring.
- Extensions are added after the number: 4maj7, 5sus, 2m7.
- Section labels such as V1, C, B (verse, chorus, bridge) organize the chart.
Example: one chart, three keys
Chorus: 1 – 5 – 6m – 4
- Key of G: G – D – Em – C
- Key of D: D – A – Bm – G
- Key of E: E – B – C#m – A
The singer wants it a step lower? Nobody rewrites anything. You just think in the new key.
Why should guitarists learn the number system?
- Instant key changes. Perfect when a vocalist needs the song higher or lower.
- Faster learning. You start seeing the same progressions across hundreds of songs, and you will understand how guitar chords work much faster.
- Better communication. “Go to the 4” is quicker than spelling out chords in rehearsal.
- Stronger ear. Over time you’ll hear a 1 – 4 – 5 move without looking.
How do you practice the Nashville Number System?
- Learn the 1, 4, 5 and 6m in the five guitar-friendly keys: C, D, E, G and A.
- Take a song you know and write its chords as numbers. Start with beginner guitar chords.
- Play the same number progression in three keys, back to back.
- Use a capo to play shapes from G while sounding in A or B. See how chords change with a capo.
Nashville numbers vs Roman numerals
They describe the same idea. Roman numerals (I, IV, V, vi) are common in music theory classes, and use uppercase/lowercase to show major/minor. Nashville numbers use regular digits and are designed for quick reading on a gig.
How do you chart a full song with numbers? A step-by-step example
Let’s chart a simple song structure (see popular song structures) the way a session player or worship team would see it. Key of G, 4/4 time.
| Section | Numbers (each = one bar) | In G |
|---|---|---|
| Intro | 1 4 1 4 | G C G C |
| Verse | 1 5 6m 4 (x2) | G D Em C |
| Pre-chorus | 4 5 6m 5 | C D |