What is Bikram Sambat?
Bikram Sambat (BS) is Nepal's official calendar. Its 12 months begin around the middle of Gregorian months, and month lengths vary by year. Accurate conversion needs a calendar table rather than a fixed year difference.
Nepali Date Converter: BS to AD & AD to BS
Convert Bikram Sambat (BS) and Gregorian (AD) dates in either direction. Check weekdays, date differences and age with a free online converter.
Convert Nepali and English dates
Choose a Bikram Sambat (BS) or Gregorian (AD) date to see its equivalent. You can also measure the difference between two dates or calculate age from a date of birth.
Choose a date
Difference between dates
Choose your calendar for each dateStart date
End date
Calculate age
Enter a date of birth in BS or AD. Age is calculated to today's date in Nepal.
Calendar-data range: BS 2000–2089 (approximately AD 1943–2033). These dates are calculated offline. Please verify dates used for legal or official documents against an authoritative Nepali calendar.
BS to AD or AD to BS
Select BS to convert a Nepali date to an English date, or AD to convert an English date to its Nepali equivalent. The matching weekday appears with both results.
Date difference and age
The Difference tab counts days between two calendar dates. The Age tab calculates completed Gregorian years, months and days since a date of birth.
How to convert Nepali and English dates
Select BS when you know the Nepali date, or AD when you know the Gregorian date. Choose the year, month and day. The converter immediately shows both dates and their weekday, without an external translation service or an account.
To compare two dates, open Difference and enter the start and end dates. To calculate age, choose Age and enter a date of birth. The converter works with its included calendar data and shows an error when a date falls outside the supported range.
Frequently asked questions
Can I convert an English date to a Nepali date?
Yes. Choose AD above the date fields, then enter your Gregorian year, month and day. The matching Bikram Sambat date appears below.
Can I convert a Nepali date back to English?
Yes. Choose BS, select the Nepali year, month and day, and read the matching Gregorian date. The tool also shows the weekday.
Does every Nepali month have the same number of days?
No. Nepali BS months have different lengths and can vary between years. This converter uses a year-specific table to validate dates.
How does the Age calculator work?
It converts the selected birth date to its Gregorian equivalent, then calculates completed years, months and days up to today in Nepal. Ages are shown as Gregorian calendar ages.
What dates can I convert?
The bundled calendar data covers BS years 2000 through 2089, approximately AD 1943 through 2033. Dates outside this range are not guessed or approximated.