How to use Thai year converter
- 1
Enter the Buddhist Era date
Thai Buddhist Era is preselected: type the B.E. year, for example 2569, and pick the month and day.
- 2
Read the Common Era date
The large card shows the C.E. date and weekday, and the Thai form of the date above it.
- 3
Convert a C.E. date instead
Choose Gregorian under Convert from and pick the date; the Thai Buddhist Era card shows its B.E. year.
- 4
Look up a year or an age
Scroll the chart for B.E., C.E., the year in Thai digits and the age reached this year.
Limits and Pro
Free: dates from 1 April 1888 (B.E. 2431) to 31 December 2299 (B.E. 2842), and a chart of 160 years from B.E. 2484 to 2643.
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About Thai year converter
Thai documents, from ID cards and bank books to university transcripts, give years in the Buddhist Era, พุทธศักราช or พ.ศ., while passports, visas and foreign forms ask for the Common Era, ค.ศ. Thailand uses the Gregorian months and days, so converting a modern date only changes the year: add 543 to go from C.E. to B.E., subtract 543 to go back. 21 October 2026 is 21 ตุลาคม พ.ศ. 2569.
Older dates need one more rule, and it is the one most converters get wrong. Until 1940 the Thai year began on 1 April, so January, February and March were still counted in the previous Buddhist year: 15 February 1939 was 2481, not 2482. When the government moved New Year to 1 January from 1941, B.E. 2483 was cut short to nine months, April to December 1940. This converter applies that rule for every date back to April 1888, when Siam adopted its solar calendar, and rejects a January to March date in 2483, which never existed.
Enter a B.E. year, month and day to get the C.E. date and weekday, or switch to Gregorian to go the other way. Each result also shows the date in Thai, with the Thai month name, and in twelve other calendars.
The chart covers every year from B.E. 2484 (1941) to 2643 (2100), with the year in Thai digits and the age a person born in it reaches on their birthday this year, handy for forms that ask for both a birth year and an age.
Privacy
Converting between B.E. and C.E. is simple arithmetic done by this page in your browser, and the chart is static text; no date you type, such as a birth date from an ID card, is sent anywhere. The last date you used stays in this browser's local storage.
Features
Pre-1941 April New Year
January to March dates before 1941 get the earlier B.E. year, as Thai records of the time do.
Thai month names and digits
Dates in Thai script and years in Thai numerals, such as ๒๕๖๙, ready to copy into a form.
Year and age chart
160 years with B.E., C.E. and the age reached this year, newest first.