Historical units
Ancient Rome
Length Units
inch
Digitus
0·7281
1-1/2
Uncia
0·9708
4
3
Palmus
2·9124
16
12
4
Pes
11·6496
20
15
5
1-1/4
Palmipes
14·562
24
18
6
1-1/2
1-1/5
Cubitus
17·4744
There was also a
Palmus Maior
of later times, which was 8·7372 inches.
