Thai Date ConverterBuddhist Era ⇄ Gregorian dates
Convert Thai Solar Buddhist Era dates and Gregorian Common Era dates in either direction. Switch between English and ไทย, copy the formatted result, and explore the weekday’s traditional Thai meaning.
Bilingual live tool
Choose the calendar year you have.
Use CE → BE for a Gregorian date or BE → CE for a Thai Buddhist Era date. The day and month remain aligned; the year changes by 543.
Thai Date Converter — CE ⇄ BE
Fast, offline conversion.
Gregorian (CE) → Thai Solar (BE)
Thai Solar (BE) → Gregorian (CE)
Formatting uses Intl.DateTimeFormat (TH/EN). Numeric BE uses BE = CE + 543.
ตัวแปลงวันที่ไทย — ค.ศ. ⇄ พ.ศ.
แปลงแบบรวดเร็ว ออฟไลน์
คริสต์ศักราช (ค.ศ.) → พุทธศักราช (พ.ศ.)
พุทธศักราช (พ.ศ.) → คริสต์ศักราช (ค.ศ.)
รูปแบบวันใช้ Intl.DateTimeFormat (ไทย/อังกฤษ) ค่าตัวเลขพ.ศ.ใช้สูตรมาตรฐาน พ.ศ. = ค.ศ. + 543.
Simple workflow
Convert, verify, and carry the date across.
Select the direction
Start in the panel matching the year system on your document: CE or BE.
Choose year, month, day
The converter validates the correct number of days for the selected month and year.
Copy or transfer
Copy the formatted result or send it directly to the opposite panel for verification.
Common Era
Gregorian year · CE / ค.ศ.
The Gregorian calendar is the international civil standard. In Thai usage, its year is commonly marked ค.ศ. for the Christian Era.
- Example: CE 2026
- Thai notation: ค.ศ. 2026
- Used for international and civil comparison
Buddhist Era
Thai Solar year · BE / พ.ศ.
Thailand’s official solar calendar uses Buddhist Era numbering while retaining Gregorian months and day structure.
- Example: BE 2569
- Thai notation: พ.ศ. 2569
- Modern rule: add 543 to the CE year
Use the right Thai calendar
Solar year conversion is not lunar-date conversion.
Thai records can reference the official solar calendar, Buddhist observance dates, or traditional lunar phases. Identify the system before interpreting the result.
Thai Solar
Use this converter for CE and BE year numbering with Gregorian months and days.
Thai Lunar
Use a dedicated Thai lunar reference for waxing/waning phases, lunar months, and observances.
Chinese Lunar
Use the Mini Lunar Converter for Chinese lunisolar dates and leap-month status.
Quick answers
Thai Date Converter FAQ
How do I convert CE to Thai Buddhist Era?
Add 543 to the CE year. For example, CE 2026 becomes BE 2569.
How do I convert BE back to CE?
Subtract 543 from the BE year. For example, BE 2569 becomes CE 2026.
Does this change the month and day?
No. For modern Thai Solar conversion, the Gregorian month and day remain the same while the year number changes.
Is this a Thai lunar converter?
No. It converts Thai Solar Buddhist Era and Gregorian dates. Thai lunar observance dates require a separate lunar-calendar tool or table.
The essential distinction
พ.ศ. changes the year number—not the calendar date structure.
Use the converter for Thai Solar records, and move to a lunar tool only when the source explicitly concerns lunar months, phases, or observance days.