Annam
units of length

19ᵗʰ – early 20ᵗʰ century

gon

mao

2

chai vai or that

5

10

sao

2

10

20

truợng

1½

3

15

30

tam or ngũ

2

3

6

30

60

thuớc

5

10

15

30

150

300

tat

10

50

100

150

300

1500

3000

phân

10

100

500

1000

1500

3000

15,000

30,000

ly

10

10

1,000

5,000

10,000

15,000

30,000

150,000

300,000

.43
mm

4.3
mm

4.3
cm

42.5
cm

2.1
m

4.3
m

6.4
m

12.8
m

63.8
m

127.5
m

.47
mm

4.7
mm

4.7
cm

47
cm

2.35
m

4.7
m

7.05
m

14.10
m

70.5
m

141.0
m

.64
mm

6.4
mm

6.4
cm

64.4
cm

3.22
m

6.44
m

9.66
m

19.32
m

96.6
m

193.2
m