Laying Curved Track: How to form a circular model train layout
Each type of track requires a different number of pieces to form a full circle. Many different model train brands make their own track systems, including Atlas, Bachmann, Kato, Lionel, LGB, MTH, Peco, Piko, and many more.
O Scale
Atlas O Track
O-27 Curve Track : 8 Pieces
O-36 Curve Track : 12 Pieces
O-45 Curve Track : 12 Pieces
O-54 Curve Track : 16 Pieces
O-63 Curve Track : 16 Pieces
O-72 Curve Track : 16 Pieces
O-81 Curve Track : 16 Pieces
O-90 Curve Track : 16 Pieces
O-99 Curve Track : 16 Pieces
Lionel FasTrack
O-36 Curve Track : 8 Pieces
O-48 Curve Track : 12 Pieces
O-60 Curve Track : 16 Pieces
O-72 Curve Track : 16 Pieces
O-84 Curve Track : 32 Pieces
O-96 Curve Track : 32 Pieces
Lionel O Tubular Track
O-31 Curve Track : 8 Pieces
O-42 Curve Track : 12 Pieces
O-54 Curve Track : 16 Pieces
O-72 Curve Track : 16 Pieces
Lionel O-27 Tubular Track
O-27 Curve Track : 8 Pieces
O-42 Curve Track : 12 Pieces
O-54 Curve Track : 16 Pieces
MTH RealTrax & ScaleTrax
O-31 Curve Track : 8 Pieces
O-42 Curve Track : 12 Pieces
O-54 Curve Track : 12 Pieces
O-72 Curve Track : 16 Pieces
O-82 Curve Track : 16 Pieces
HO Scale
Atlas HO Code 83 & Code 100
15" Radius Curve Track : 12 Pieces
18" Radius Curve Track : 12 Pieces
22" Radius Curve Track : 16 Pieces
24" Radius Curve Track : 16 Pieces
Kato HO UNITRACK
370mm (14 9/16") Radius Curve Track : 16 Pieces
430mm (16 7/8") Radius Curve Track : 16 Pieces
490mm (19 1/4") Radius Curve Track : 16 Pieces
550mm (21 5/8") Radius Curve Track : 16 Pieces
610mm (24") Radius Curve Track : 16 Pieces
670mm (26 3/8") Radius Curve Track : 16 Pieces
730mm (28 3/4") Radius Curve Track : 16 Pieces
790mm (31 1/8") Radius Curve Track : 16 Pieces
867mm (34 1/8") Radius Curve Track : 16 Pieces
Bachmann E-Z Track
15" Radius Curve Track : 12 Pieces
18" Radius Curve Track : 16 Pieces
22" Radius Curve Track : 16 Pieces
26" Radius Curve Track : 20 Pieces
28" Radius Curve Track : 20 Pieces
G Scale
LGB
R1 645mm (25.4") Radius Curve Track : 12 Pieces
R2 823mm (32.4") Radius Curve Track : 12 Pieces
R3 1243mm (49") Radius Curve Track : 16 Pieces
R5 2363mm (93.25") Radius Curve Track : 24 Pieces
PIKO
R1 600mm (23.6") Radius Curve Track : 12 Pieces
R3: 920mm (36.2") Radius Curve Track : 12 Pieces
R5 1240mm (48.8") Radius Curve Track : 24 Pieces
R7 1560mm (61.4") Radius Curve Track : 24 Pieces
N Scale
Atlas N Code 55 Snap Track
10" Radius Curve Track : 16 Pieces
11.25" Radius Curve Track : 16 Pieces
12.5" Radius Curve Track : 16 Pieces
13.75" Radius Curve Track : 16 Pieces
15" Radius Curve Track : 16 Pieces
16.25" Radius Curve Track : 16 Pieces
17.5" Radius Curve Track : 16 Pieces
18.75" Radius Curve Track : 16 Pieces
20" Radius Curve Track : 16 Pieces
21.25" Radius Curve Track : 16 Pieces
30.609" Radius Curve Track : 32 Pieces
71" Radius Curve : 44 Pieces + 1 Piece 4.25" Straight Track
Atlas N Code 80 Snap Track
9.75" Radius Curve Track : 12 Pieces
11" Radius Curve Track : 12 Pieces
19" Radius Curve Track : 24 Pieces
Kato N UNITRACK
216mm (8 9/16") Radius Curve Track : 8 Pieces
249mm (9 3/4") Radius Curve Track : 8 Pieces
282mm (11") Radius Curve Track : 8 Pieces
315mm (12 3/8") Radius Curve Track : 8 Pieces
348mm (13 3/4") Radius Curve Track : 8 Pieces
381mm (15"") Radius Curve Track : 12 Pieces
481mm (19") Radius Curve Track : 24 Pieces
718mm (28 1/4") Radius Curve Track : 24 Pieces
S Scale
American Flyer FastTrack With Road Bed
R20 40" Diameter : 12 Pieces
R27 54" Diameter : 12 Pieces