The thai gold-weights measures. 
During nearly all of the world to specify the weight from gold in gram or ounce, indicates the gold in Thailand general an own scale unit so called weight-Baht weighed, what in this case not to confound with the exchange rate (Baht). One weight-Baht has accurate 15,16 gram, this is a little bit more than a half fine-ounce (1 ounce = 31,103 gram).
In the shop windows from thai gold shop quoted gold price applied ever on 1 weight-Baht. The weight-Baht to divide in 4 Salüng. Salüng matters a quarter. On that score becomes also the thai 25-Satang-coin “Salüng” called.

Measures and weight get in thai scale unit. See also the spreadsheet.

Linear measure

Thai-measures

divide

Metric measure

1 Kyyp

½ Sauk

25 cm

1 Sauk

¼ Waa

50 cm

1 Waa

1/20 Sen

2 metre

1 Sen

20 Waa

40 metre

Square measure

1Tarang-Waa

100 Waa²sauk

4 m²

1 ngaan

100 Waa

400 m²

1 Rai

400 Waa

1.600 m²

Solid measure

1 Tannan

1 litre

1 Sat

20 Tannan

20 litre

1 ban

50 Sat

1.000 litre

1 kwiin

2 Ban

2.000 litre

Weight measure

1 Carat

weight gems

1/5 gram

1 gram

5 Carat

1 gram

1 Baht

weight for gold

15,16 gram

1 Khiit

¼ Waa

100 gram

1 Caddi

6 Khiit

604 gram

1 Pigun

100 Caddi

60,48 kilogram

1 Nui

1 Zoll/inch

2,54 cm