Why can't Bikram Sambat use a simple year offset?

Unlike the Thai Buddhist calendar, Bikram Sambat month lengths range from 29 to 32 days and change from year to year. A fixed offset would drift, so the converter uses the published per-year table of month lengths, anchored at 1 Baisakh 2000 = 14 April 1943.

How accurate is the conversion and what range is supported?

The conversion is exact within the supported range of BS 2000 to 2089 (approximately AD 1943 to 2033) because it walks the official Nepali calendar table via the Julian Day Number. Dates outside that range are not converted.

Is my date sent anywhere?

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

Nepali Bikram Sambat Converter (BS ⇄ AD)

Nepali Bikram Sambat converter

Convert between Gregorian (AD) dates and the Nepali Bikram Sambat (BS / बिक्रम सम्बत) calendar. Because BS month lengths vary from 29 to 32 days and differ year to year, the converter uses the published Nepali calendar table anchored at 1 Baisakh 2000 = 14 April 1943, walked through the Julian Day Number for an exact result. Supported range: BS 2000–2089.

It is privacy-first: every calculation happens locally in your browser and nothing is ever sent anywhere.