How does the Thai Buddhist Era relate to the Gregorian year?

The Buddhist Era (BE / พ.ศ.) is the Common Era (CE / ค.ศ.) plus 543. For example, 2026 CE is 2569 BE. Since 1941 the Thai solar calendar uses the same day and month as the Gregorian calendar, so only the year differs.

Is the conversion accurate?

Yes. For dates from 1941 onward the Thai solar calendar is identical to the Gregorian calendar except for the +543 year offset, so the conversion is exact and deterministic.

Is my date sent anywhere?

No. The converter is privacy-first — every calculation happens locally in your browser and no date ever leaves your device.

How do I convert a BE year to CE?

Subtract 543. For example, 2569 BE − 543 = 2026 CE. To go the other way, add 543 to the Gregorian year.

Do the day and month change when converting?

No. Since 1941 the Thai solar calendar shares the same day and month as the Gregorian calendar, so a date converts by changing only the year — 28 May stays 28 May.

Why is the offset 543 and not 544?

The Buddhist Era counts from the year of the Buddha's passing. Thailand's official BE-to-CE offset for the solar calendar is a fixed 543 years, which this tool applies directly.

Does this handle Thai lunar dates or festivals?

No. This converter is for the everyday Thai solar (Suriyakati) calendar. Traditional lunar festival dates like Songkran's lunar reckoning are not computed here.

What is the Thai Buddhist Date Converter (BE ⇄ CE)?

Free Thai Buddhist calendar converter. Convert any Gregorian (CE) date to the Thai Buddhist Era (BE / พ.ศ.) and back — Buddhist Era = Common Era + 543. Privacy-first and runs entirely in your browser; nothing is sent anywhere. It runs free in your browser on Gera Tools, with nothing uploaded.

Thai Buddhist Date Converter (BE ⇄ CE)

Name: Thai Buddhist Date Converter (BE ⇄ CE)
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

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Thai Buddhist date converter

This converter translates between Gregorian (CE / ค.ศ.) dates and the Thai Buddhist Era (BE / พ.ศ.) used on official Thai documents, IDs and signage. It is for anyone reading a Thai date, filling in a form, or checking a birth year against the Western calendar.

How it works

Since 1941 the Thai solar calendar (Suriyakati) shares the same day and month as the Gregorian calendar; only the year differs, by a fixed offset:

Buddhist Era (BE) = Common Era (CE) + 543
Common Era (CE)   = Buddhist Era (BE) − 543

So converting a date changes only the year — the day and month stay exactly as entered. The conversion is pure arithmetic and is exact for any date from 1941 onward.

Quick reference table

Gregorian (CE)	Thai Buddhist (BE)	Common context
1980	2523	Birth years on older Thai IDs
2000	2543	Turn of millennium on Thai documents
2010	2553	Mid-career dates, bank records
2026	2569	Current year
2030	2573	Near-future contract end dates

Where you encounter Thai Buddhist dates

National ID cards (บัตรประชาชน). The birth date and card expiry date are printed in Buddhist Era. A birth year of 2543 means the person was born in 2000 CE.

Bank statements and contracts. Thai banks issue statements dated in BE. If you receive a Thai wire transfer confirmation or lease agreement, the issue date is in BE.

Official forms and government documents. Applications, court filings, and civil registration records all use BE. When filling in an online form that asks for your date of birth, confirm whether it expects CE or BE — many Thai government portals expect BE.

Vehicle registration and licence plates. Vehicle registration documents record the issue year in BE; the registration expiry year is also in BE.

Educational certificates. Thai university and school certificates state the graduation year in BE. Foreign employers and academic institutions accepting Thai transcripts often need the Gregorian equivalent.

Why the offset is 543 and not 544

The Buddhist Era counts from the year of the Parinirvana (the passing) of the Buddha. Thailand adopted a specific reckoning that places this 543 years before the Common Era, giving the fixed offset of +543 when converting CE to BE. Other Buddhist countries use slightly different starting years (for example, Sri Lanka’s Buddhist calendar is sometimes offset by 544), so this converter is specific to the Thai solar (Suriyakati) calendar.

Note on pre-1941 dates

Before 1 April 1941 Thailand used the Thai lunar calendar for civil purposes, and the New Year fell on a different date (traditionally 13 April, Songkran). Dates from before 1941 can require more careful handling because the new year boundary does not align with 1 January. This tool applies the post-1941 solar calendar rules and is most reliable for contemporary dates.

Everything runs locally in your browser — no date you enter is sent anywhere.