Thai Date Converter: พ.ศ. ↔ ค.ศ. and Thai Date Formatting
The Thai Date Converter turns any Buddhist Era year into its Gregorian equivalent and back again, using the simple 543-year offset that Thailand's calendar follows. It also formats any date in full Thai — complete with Thai month names, weekday names and the พ.ศ. year — plus short, numeric and ISO variants you can copy in one click. Everything runs in your browser, with no sign-up and no data leaving your device.
Enter a whole-number year. Buddhist Era = Gregorian + 543.
Choose any date to see it written in full Thai with the Buddhist Era year.
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Your conversion will appear here
Type a year to convert between Buddhist Era (พ.ศ.) and Gregorian (ค.ศ.).
Year conversion
Buddhist Era (พ.ศ.)
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Gregorian (ค.ศ.)
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Thailand counts years from the Buddhist Era (BE), which runs 543 years ahead of the Gregorian year (CE).
Pick a date to see the Thai formats.
Thai date formats
- Full Thai date
- Short Thai date
- Numeric (พ.ศ.)
- ISO (Gregorian)
- Your language
How to use
- Open the Convert year tab and choose a direction — พ.ศ. to ค.ศ. or the reverse.
- Type a year; the Buddhist Era and Gregorian values update instantly.
- Switch to the Format Thai date tab and pick any date on the calendar.
- Read the full Thai date plus short, numeric and ISO formats, then copy the one you need.
- Check the Today card for the current date in both eras at a glance.
Features
- Two-way year conversion between Buddhist Era (พ.ศ.) and Gregorian (ค.ศ.)
- Full Thai date formatting with Thai month and weekday names
- Short, numeric (dd/mm/พ.ศ.) and ISO (Gregorian) formats, each copyable
- Always-on Today card showing the current date in both eras
- Dates handled as plain calendar dates — no timezone shifts
- 100% in-browser — nothing is uploaded or stored