Thai numerals

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Thai numerals (ตัวเลขไทย) are traditionally used in Thailand, although the Hindu-Arabic numerals (also known as Western numerals) are more common. Apart from the different symbols used for the numerals, the Thai numeration system is exactly the same as the Hindu-Arabic numeral system used in the rest of the world.

1 Cardinal numbers
2 Ordinal numbers
3 Alternate numbers
4 See also

[edit] Cardinal numbers

[edit] Zero to nine

Thai		RTGS	value
๐	ศูนย์	sun	zero
๑	หนึ่ง	nueng	one
๒	สอง	song	two
๓	สาม	sam	three
๔	สี่	si	four
๕	ห้า	ha	five
๖	หก	hok	six
๗	เจ็ด	chet	seven
๘	แปด	paet	eight
๙	เก้า	kao	nine

[edit] Ten to a million

These are assembled from the words for the powers of ten. The number one following a power of ten becomes et. The numbers from twenty to twenty nine begin with yi sip.

Thai		RTGS	value
๑๐	สิบ	sip	ten
๑๑	สิบเอ็ด	sip et	eleven
๑๒	สิบสอง	sip song	twelve
๒๐	ยี่สิบ	yi sip	twenty
๒๑	ยี่สิบเอ็ด	yi sip et	twenty-one
๒๒	ยี่สิบสอง	yi sip song	twenty-two
๑๐๐	ร้อย	roi	hundred
๑๐๐๐	พัน	phan	thousand
๑๐๐๐๐	หมื่น	muen	ten thousand
๑๐๐๐๐๐	แสน	saen	hundred thousand
๑๐๐๐๐๐๐	ล้าน	lan	million

For example, two hundred and thirty-two is song roi sam sip song. The words roi, phan etc. should never be used without a preceding numeral (unless it is beginning nueng), so two hundred and ten, for example, is song roi sip and not song roi nueng sip, and one hundred is either roi or nueng roi (both are acceptable). The same thing goes for phan, muen, saen, and so forth. Native speakers will sometimes use roi nueng (or phan nueng, etc.) with different tones on nueng to distinguish one hundred from one hundred and one. However, such distinction is often not made, and ambiguity may follow. To resolve this problem, if the number 101 (or 1001, 10001, etc.) is intended, one should say roi et (or phan et, muen et, etc.).

[edit] Numbers above a million

Numbers above a million are constructed by prefixing lan with a multiplier. For example, ten million is sip lan, and a trillion (10¹²) is lan lan.

[edit] Decimal and fractional numbers

Colloquially, decimal numbers are formed by saying จุด (chut, dot) where the decimal separator is located. For example, 1.01 is หนึ่งจุดศูนย์หนึ่ง.

Fractional numbers are formed by placing ใน (nai, in, of) between the numerator and denomintor. For example, ⅓ is หนึ่งในสาม.

[edit] Negative numbers

Negative numbers are formed by placing ลบ (lop, minus) in front of the number. For example, -11 is ลบสิบเอ็ด.

[edit] Ordinal numbers

Ordinal numbers are formed by placing ที่ (thi, place) in front of the number.

Thai	RTGS	meaning
ที่หนึ่ง	thi nueng	first
ที่สอง	thi song	second
ที่สาม	thi sam	third
ที่สี่	thi si	fourth
ที่#	thi #	#st, #nd, #rd, #th

[edit] Alternate numbers

An alternate set of numerals is used to name tonal marks (ไม้, mai) and educational degrees (ปริญญา, prinya).

Number			Tonal Mark				Educational Degree
Thai	RTGS	Value	Mark	Thai	RTGS	Meaning	Thai	RTGS	Meaning
เอก	ek	one	–่	ไม้เอก	mai ek	first tone mark	ปริญญาเอก	prinya ek	doctor's degree
โท	tho	two	–้	ไม้โท	mai tho	second tone mark	ปริญญาโท	prinya tho	master's degree
ตรี	tri	three	–๊	ไม้ตรี	mai tri	third tone mark	ปริญญาตรี	prinya tri	bachelor's degree
จัตวา	chattawa	four	–๋	ไม้จัตวา	mai chattawa	fourth tone mark