Does Thailand use B.E. everywhere officially?

Yes — Thai government documents, national ID cards, driver's licences, and legal contracts use B.E. (พ.ศ.). International contexts such as passports, airline tickets, and banking often display both or default to C.E. (ค.ศ.).

What about dates before C.E. 1? Does the formula still work?

The formula B.E. = C.E. + 543 is valid for any positive C.E. year. For years in 1 B.C. or earlier (astronomical year 0 or negative), the mapping becomes more complex and this tool does not handle them — it is designed for everyday modern date conversion.

Why is B.E. year 2568 the same as C.E. 2025?

2568 − 543 = 2025. The Thai New Year (Songkran, April 13) historically marked the start of the B.E. year, so for the first few months of the Gregorian year (January–April 13) the B.E. and C.E. years can differ by 544 depending on the context — but modern practice treats January 1 as the start of the B.E. year too.

Can I convert a full date (day/month/year), not just the year?

This tool converts the year component only, since that is what differs between the two calendars. The day and month remain identical in both B.E. and C.E. systems — just swap the year using the result here.

Thai Buddhist Era Converter

Convert between Thai Buddhist Era (พ.ศ.) and Gregorian (ค.ศ.) calendar years instantly.

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Buddhist Era (B.E.) Year

Conversion Formula

C.E. = B.E. − 543

B.E. = C.E. + 543

Current Year (Reference)

B.E.

2569

C.E.

2026

How to Use

1
Choose the conversion direction: B.E. → C.E. or C.E. → B.E. using the tab at the top.
2
Type the year number into the input field.
3
The result appears instantly in the large display below.
4
Click the Copy button to copy the converted year to your clipboard.

Use Cases

Government & Legal Documents

Thai official documents use B.E. dates; convert to C.E. for international submissions or vice-versa.

Passport & Visa Applications

Passports issued in Thailand show dates in both formats; quickly double-check either year.

Historical Research

Convert B.E. dates found in Thai historical records into C.E. for cross-referencing with global events.

HR & Payroll Systems

Employee records in Thai companies often store birth and hire dates in B.E.; convert for international HR systems.

Frequently Asked Questions

Instantly convert years between the Thai Buddhist Era (B.E. / พ.ศ.) and the Gregorian Common Era (C.E. / ค.ศ.). The Buddhist Era is exactly 543 years ahead of the Common Era, so the conversion is a simple add or subtract — but easy to forget under pressure.

The Buddhist Era counts from the year of the Buddha's passing (parinibbana), traditionally placed 543 years before the birth of Christ. Hence B.E. = C.E. + 543. Different Buddhist traditions use slightly different offsets; the 543-year gap is the one officially adopted by Thailand.