Thai Year Converter

Convert between Gregorian (CE/AD) and Thai Buddhist Era (BE) calendar years with this Thai Year Converter. Enter a year or full date, choose your conversion direction (Gregorian to Thai or Thai to Gregorian), and get back the converted year, era difference, and current BE year at a glance. Handy for travel documents, Thai ID cards, legal paperwork, or simply understanding Thai dates.

Enter a 4-digit year. For Gregorian→Thai enter a CE year (e.g. 2025). For Thai→Gregorian enter a BE year (e.g. 2568).

If you enter a full date, the year above will be overridden by the date's year.

Results

Converted Year

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Input Year

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Result Calendar

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Era Difference

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Current BE Year (Today)

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Converted Full Date

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Results Table

Frequently Asked Questions

What is the Thai Buddhist Calendar?

The Thai Buddhist Calendar uses the Buddhist Era (BE), which begins from the year of the passing of Gautama Buddha in 543 BCE. Thailand officially adopted this system in 1888. This makes the Thai Buddhist year always 543 years ahead of the Gregorian (CE/AD) year — so 2025 CE corresponds to 2568 BE.

How do I convert a Gregorian year to a Thai year?

Simply add 543 to the Gregorian (CE) year. For example, 2025 CE + 543 = 2568 BE. This tool does that calculation automatically when you select 'Gregorian → Thai' and enter your year.

How do I convert a Thai (BE) year to a Gregorian year?

Subtract 543 from the Thai Buddhist Era (BE) year. For example, 2568 BE − 543 = 2025 CE. Select 'Thai → Gregorian' in the tool and enter the BE year to get the result instantly.

Is the 543-year difference always exact?

For the official Thai solar calendar used in modern Thailand, yes — the difference is consistently 543 years. However, Thailand also observes lunar-based holidays (such as Songkran and Buddhist holy days) which may vary by a day or two each year based on lunar calculations rather than a fixed solar offset.

Where is the Thai Buddhist year used in practice?

The Thai Buddhist year appears on Thai ID cards, school records, government documents, legal contracts, newspapers, and museum displays. Thai passports, however, use the international Gregorian year for compatibility with global travel systems.

What if I enter both a full date and a year?

If you enter a full date in the date field, the year from that date takes priority over the standalone year input. The converter will extract the year from your date and apply the appropriate +543 or −543 conversion.

Can I see today's Thai year at a glance?

Yes — the 'Current BE Year (Today)' output always shows the current Thai Buddhist year based on today's date, regardless of what year you type in the input field. It's a quick reference so you always know what year it is in Thailand right now.

What about festivals or lunar-based Thai dates?

Some Thai holidays like Visakha Bucha and Makha Bucha follow the Thai lunar calendar, which does not map directly to the solar Buddhist Era offset. For those dates, a lunar-solar conversion is needed. This tool covers the standard solar Thai Buddhist Era (BE) used in everyday and official contexts.

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