Thai Buddhist Year Converter
Convert modern Thai Buddhist Era dates to Gregorian dates and back using the January-start solar-calendar convention.
Starts with an editable example. Replace the dates and rules with your own.
Your calculation
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Choose your dates.
Select your counting rules and calculate.
Calculation details
| Step | Value |
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How to use this calculator
Select a direction and enter the date. Gregorian coverage begins January 1, 1941 and ends December 31, 2100.
The Buddhist Era year is the Gregorian year plus 543. Month, day and leap-year rules follow the Gregorian calendar in this supported modern convention.
A worked example
November 4, 2026 corresponds to Buddhist Era November 4, 2569.
Does this handle the Thai lunar calendar or older April-start years?
No. This tool deliberately covers the modern January-start solar convention only.
Which calendar and years are supported?
Each result states its calendar, time scale, precision and supported range. Batch converters accept up to 100 nonempty input lines and retain invalid rows. Copy, CSV and print include the calculation rules. Calendar downloads appear when a result contains dated events. Calculations run in your browser; no reminders or jobs are scheduled.
What happens to my dates?
Calculations run on your device. Saving a calculation is optional and keeps it in this browser. A setup link contains the dates and settings you entered; anyone with the link can read them. Use one tab per saved calculator. Clear saved data from Privacy & settings.