Nashville Number System

The Nashville Number System allows songs to be represented independently of key.

Example

Key of C:

1 4 5 1

becomes

C F G C

Key of G:

1 4 5 1

becomes

G C D G

Supported Degrees

1
2
3
4
5
6
7

Accidentals

♭2
♭3
♯4
♭6
♭7

Qualities

6m
2m
7°

Slash Chords

5/7
1/3

Conversion

Use:

• NNS → Chords
• Chords → NNS

for chart-wide conversion.