Bikram Sambat to AD Date Converter

BS to AD and AD to BS, exact to the day

In shortEnter a date in either calendar and get the other at once. The conversion follows the official Bikram Sambat month lengths for each year, so it is exact, not an approximation.

Last reviewed: September 2026

GregorianBikram Sambat

YearMonthOctDay

The twelve Bikram Sambat months

#	Month	Nepali	Gregorian span
1	Baishakh	वैशाख	mid April to mid May
2	Jestha	जेठ	mid May to mid June
3	Ashadh	असार	mid June to mid July
4	Shrawan	साउन	mid July to mid August
5	Bhadra	भदौ	mid August to mid September
6	Ashwin	असोज	mid September to mid October
7	Kartik	कात्तिक	mid October to mid November
8	Mangsir	मंसिर	mid November to mid December
9	Poush	पुस	mid December to mid January
10	Magh	माघ	mid January to mid February
11	Falgun	फागुन	mid February to mid March
12	Chaitra	चैत	mid March to mid April

How the conversion works

Bikram Sambat is a solar calendar: each month begins when the Sun enters a new rashi (sankranti), so month lengths range from 29 to 32 days and are published each year in the official almanac. The converter uses those published lengths, month by month, rather than a fixed offset. The table runs from 1970 to 2100 BS, which is 1913 to 2043 AD; a date outside that span cannot be converted exactly and is reported as out of range.

Bikram Sambat is the official calendar of Nepal and is used across northern India alongside the Gregorian calendar. Birth certificates, school records and citizenship documents in Nepal carry BS dates, which is the usual reason a conversion is needed for a kundali.

Frequently Asked Questions

How do I convert a Bikram Sambat date to AD?▾

Choose Bikram Sambat on the converter, enter the year, month and day, and press Convert. The Gregorian date appears below. The conversion uses the official month lengths for each BS year, which vary between 29 and 32 days, so it is exact rather than a 56 years 8 months approximation.

What is the difference between BS and AD years?▾

Bikram Sambat runs about 56 years and 8 months ahead of the Gregorian calendar: 2083 BS spans April 2026 to April 2027. The BS new year (Baishakh 1) falls around 13 or 14 April, so a Gregorian year straddles two BS years.

Why do BS months have 29 to 32 days?▾

Bikram Sambat is a solar calendar whose months follow the Sun's passage through the twelve rashis (sidereal signs). The Sun moves faster in some signs than others, so the months are unequal and their lengths are fixed each year by the official almanac rather than by a formula.

Which date should I use for my kundali?▾

Either. Convert your BS birth date here and enter the AD date on the free kundali page, or enter the BS date directly inside the app. The chart depends on the instant of birth, not on which calendar names it.

Hindu CalendarThe month with tithis, festivals and panchanga Today's panchangaTithi, nakshatra and Rahu kaal for your city Free kundaliEnter the converted date and draw the chart The 12 rashisThe signs the BS months follow

Now draw the chart for that date

Your free kundali needs the date, time and place of birth. The converter gives you the date in either calendar; the chart takes a minute.

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