Converting Between Buddhist Era and Gregorian Years

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From A.D. to B.E.

Add 543. If an event was in 1997 A.D., its modern Thai year is 1997 + 543 = 2540 B.E.

From B.E. to A.D.

Subtract 543. A document dated 2568 B.E. uses the Gregorian year 2568 − 543 = 2025. You can type Thai numerals such as ๒๕๖๘ into the year converter.

Copy the whole date correctly

Modern Thai and Gregorian dates use the same day and month, but a numeric date can still be ambiguous. On a Thai day-first record, 04/07/2568 is 4 July 2025. When sharing a conversion, spelling out the month makes it clearer.

Look for a day and month on old records

Before January 1941, the Thai civil year changed in April. This means a historical B.E. year can span parts of two Gregorian years. The full date converter handles this when you select the historical convention.