Chu so Thai Lan (tieng Thai: เลขไทย, IPA: leːk tʰaj) la he đem so tu cua Thai Lan, co nguon goc tu chu so Khmer.


Su dung Tieng Thai khong co so ngu phap. Khi chi so luong, ta lan luot dung danh tu đi cung voi so va loai tu. "Nam giao vien" khi đo se đuoc viet thanh "giao vien nam nguoi" - khru ha khon (tieng Thai: ครหาคน) hoac thay "nam" bang so Thai (tieng Thai: คร ๕ คน). Loai tu trong tieng Thai khong phan thu bac.
Danh sach o đay liet ke mot vai loai tu nhu đa neu tren.


Chu so chinh = 0 đen 10 =
Khi dung he chu so A Rap, so khong đuoc viet la 0, nhung se đuoc viet nho va tron hon (๐) khi dung chu so truyen thong. Bang duoi đay trinh bay cac so tu 0 đen 10 va su tuong đong cua chung đoi voi cac ngon ngu nhu Quang Đong hay Man Nam o khu vuc Hoa Nam, Trung Quoc - noi đuoc cho la que huong cua nguoi dan toc Thai. Tu nguyen cua cac so 2, 3, 4, 6, 7, 8, 9, va 10 bat nguon tu thoi trung đai, trong khi tu nguyen cua so 5 bat nguon tu thoi co đai Trung Quoc.
Chu y: RGTS (Royal Thai General System of Transcription) la he thong chuyen tu tieng Thai sang ky tu Latinh cua Thai Lan.

Cac ky tu đe viet chu so trong tieng Thai cung co nhieu điem tuong đong voi tieng Khmer va tieng Lao, đac biet la tieng Lao.


= u10 đen 1 trieu =


= Lon hon 1 trieu =
Dung ลาน (lan, đon vi trieu) ket hop voi cac đon vi nho hon đe ghi so. Vi du, 10 trieu se la สิบลาน (sip lan); 1 ty se la พันลาน (phan lan, ket hop 1 ngan voi 1 trieu) va 1 ngan ty se la ลานลาน (lan lan, ket hop 1 trieu voi 1 trieu).


= So thap phan va phan so =


 So thap phan  Thong thuong, đe goi so thap phan, ta them tu chut vao so đo đe chi dau thap phan (จด, co nghia la "dau cham", tieng Viet dung dau phay). Vi du, 1,01 đoc la nueng chut sun nueng (หนึงจดศนย์หนึง, nguyen van: mot cham khong mot).


 Phan so  Phan so đuoc goi bang cach them tu nai (ใน, co nghia la "o trong", "cua") hoac suan (สวน, co nghia la "phan"), tuong tu nhu tieng Viet dung tu "phan".
Cong thuc đoc phan so se la: [set] x suan y ([เศษ] x สวน y, x phan y, set (เศษ) co the đuoc luoc bo). Vi du, ⅓ đoc la nueng nai sam (หนึงในสาม, mot phan ba) hoac [set] nueng suan sam ([เศษ]หนึงสวนสาม).
Tu khrueng (ครึง) co nghia la "mot nua". Tu nay đung truoc loai tu neu dung đon đoc, va đung sau loai tu neu co them so tu đi kem nua. Nhu vay, kradat khrueng phaen (กระดาษครึงแผน, mot nua to giay) se co nghia nguyen van la: "giay mot nua to ", va kradat nueng phaen khrueng (กระดาษหนึงแผนครึง, mot to giay ruoi) co nghia nguyen van la: "giay mot to va mot nua".


= So am =
So am đuoc goi bang cach them tu lop (ลบ, co nghia la "am") vao phia truoc cua so đo. Vi du, −11 se đoc la lop sip et (ลบสิบเอ็ด, am muoi mot).


= So thu tu =
Goi ten bang cach them tu thi (ที, co nghia la "o", "thu", "vi tri thu", tuong tu nhu tieng Viet) vao phia truoc cua so đo. Đay khong đuoc coi la mot nhom so tu đac biet vi no van co the theo sau mot danh tu cu the.


Chu so khac = Ai =
Ai (tieng Thai: อาย) la tu dung đe chi "con (trai) đau long" hay Thang Mot, duean ai (เดือนอาย, Thang Gieng) trong Am lich Thai Lan.


= Ek =
Ek (tieng Thai: เอก) bat nguon tu tieng Pali eka, co nghia la "mot". Ek co the hieu la "thu nhat" (trong ten cua thanh đieu thap เสียงเอก sieng ek va trong thu hang hoc vi, quan ham Thai); hoac "chinh" (khi nhac đen vai dien chinh). Thoi xua, trong gia đinh, nguoi con gai thu bay đuoc goi la luk ek (ลกเอก), con nguoi con trai thu bay đuoc goi la luk chet (ลกเจ็ด).


= Et =
Et (tieng Thai: เอ็ด, tieng Quang Đong: 一, yat1; Man Nam: 一, it4), co nghia la "mot". Cac so tu 11, 21, 31 đen 91 đuoc goi la สิบเอ็ด (sip et), ยีสิบเอ็ด (yi sip et), สามสิบเอ็ด (sam sip et) va เกาสิบเอ็ด (kao sip et) chu khong phai สิบหนึง (sip nueng), สองสิบหนึง (song sip nueng), สามสิบหนึง (sam sip nueng) hay เกาสิบหนึง (kao sip nueng). Et o đay co the coi la "mot" trong tieng Viet, nhung ap dung cho ca so 11.


= Yi =
Yi (tieng Thai: ยี, tieng Quang Đong: 二, yi6; Man Nam: 二, ji7), co nghia la "hai", ben canh tu song (สอง) đa co. Cac so tu 20 đen 29 lan luot se la yi sip (20), yi sip et (21) toi yi sip kao (29). Thang Hai con co ten goi duean yi (เดือนยี) trong Am lich Thai Lan.


= Tho =
Tho (tieng Thai: โท) bat nguon tu tieng Pali dua, co nghia la "hai". Tho co the hieu la "thu hai" (trong ten cua thanh đieu luyen xuong เสียงโท sieng tho va trong thu hang hoc vi, quan ham Thai).


= Sao =
Sao (tieng Thai: ซาว) co nghia la 20 trong tieng Bac Thai va tieng Isan, chu y su tuong đong voi xao (ຊາວ) trong tieng Lao va (ꪏꪱꪫ) trong tieng Thai Đen.


= Lo =
Lo (tieng Thai: โหล) co nghia la mot ta (12) va thuong đuoc dung trong thuong mai. Lo cung co nghia la "hop" hay "lo".


= Kurut =
Kurut (tieng Thai: กรส) co nghia la mot got (mot ta ta, 144). Đay la tu muon co goc tu tieng Anh gross (got) va thuong đuoc dung trong thuong mai.


= Kot =
Kot (tieng Thai: โกฏิ) bat nguon tu tieng Pali/Phan koti, co nghia la "muoi trieu" (10 000 000). Kot đuoc tim thay trong cac van ban ton giao.


Xem them Bang chu cai tieng Thai
Tieng Thai
Chu so Trung Quoc
Chu so Khmer


Chu thich Lien ket ngoai Thai Royal Institute On-line Dictionary Luu tru ngay 3 thang 3 nam 2009 tai Wayback Machine (ORID 1999) [TH: พจนานกรม ฉบับราชบัณฑิตยสถาน พ.ศ. ๒๕๔๒]
Numerals in many different writing systems, which includes Lao, Khmer and Thai numerals 0-9; retrieved 2008-11-12
Graphic version of Numerals in many different writing systems, no Unicode required; retrieved 2008-11-12
Thai Numbers. How they are written in their numeral and textual forms and how to pronounce them.
Search result for numerative noun (11 muc)
"International Reference Library Thread of Thai Classifiers" (38 muc)