Bulk Nepali Date Converter (BS ⇄ AD)

Bulk Nepali Date Converter BS to AD & AD to BS

The Bulk Nepali Date Converter makes it easy to convert multiple dates between Bikram Sambat (BS) and the Gregorian calendar (AD) in one go. Instead of using the Nepali date converter one date at a time, you can process a list of dates together, making the tool useful for spreadsheets, records, forms, historical data, and other situations where many Nepali dates need to be converted.

Bikram Sambat dates are widely used in Nepal, while Gregorian dates are commonly required for international, digital, and administrative purposes. Because BS and AD do not follow a simple fixed offset, accurate conversion requires calendar data for the relevant year rather than simply adding or subtracting a fixed number of years.

How the Bulk Nepali Date Converter Works

Use the converter to process multiple dates between BS and AD:

• Select the conversion direction: BS to AD or AD to BS.
• Enter your dates using the format supported by the converter.
• Add multiple dates when you need to process a list.
• Start the conversion.
• Review, copy, or use the converted results in your records or spreadsheet.

For official documents, always compare the converted result with your original document and follow the requirements of the relevant authority.

Why BS to AD Conversion Is Not a Fixed Offset

A common mistake is assuming that a Bikram Sambat date can always be converted to AD by subtracting exactly 56 or 57 years. That is not sufficient for an accurate date conversion.

Nepali calendar months do not have the same fixed lengths as Gregorian months, and the relationship between BS and AD changes throughout the calendar year. A reliable converter therefore needs year-specific calendar information to determine the corresponding date. If you also need to find the number of days between two converted dates, use the date duration calculator.

This is especially important when converting dates of birth or other dates appearing on official documents.

Nepal's Official Calendar Reference

For calendar-related information, one important government reference is the Nepal Panchanga Nirnayak Development Committee (नेपाल पञ्चाङ्ग निर्णायक विकास समिति). The committee is a Government of Nepal organization under the Ministry of Culture, Tourism and Civil Aviation. Its official website publishes information and notices concerning Panchanga and calendar publication and approval.

For example, the committee has published notices concerning the publication of the 2083 BS Panchanga, including requirements and the calculation system to be followed for Panchanga submitted for approval.

Official reference: Nepal Panchanga Nirnayak Development Committee

BS and AD Dates for Passport Applications

Accurate BS to AD date conversion can be particularly important when completing government applications.

The Department of Passports, Government of Nepal, states in its passport application instructions that the date of birth from a citizenship certificate or Minor ID should be entered in the BS field, while the same date should be converted to the A.D. (Gregorian) calendar for the AD field.

This makes BS to AD conversion useful when checking dates before completing passport-related forms.

Official reference: Department of Passports, Nepal

For additional information about birth registration and civil-registration services, you can also refer to the Department of National ID and Civil Registration, Government of Nepal. The department publishes official notices and registration instructions relating to personal events such as birth registration.

Official reference: Department of National ID and Civil Registration

When You May Need a Nepali Date Converter

BS to AD conversion can be useful for:

• Citizenship and identity documents
• Passport applications
• Birth and civil-registration records
• School and university records
• Employment records
• Historical documents
• International applications
• Spreadsheets and databases containing Nepali dates
• Converting a large list of dates at once

If a converted date will be used for a legal or government purpose, verify the result against your original document and the instructions provided by the relevant authority.

Related NepaCalc Calculators

If you are working with Nepali dates, these related tools may also be useful:

• Age Calculator Calculate age from a date of birth.
• Nepal Citizenship Age Calculator Check age-related citizenship requirements.
• Workdays Calculator Count business days between two dates.

You can also explore other Nepal-specific calculators and conversion tools available on NepaCalc.