BS-AD Date Converter

Convert dates from Bikram Sambat (BS) to Anno Domini (AD) calendar instantly with this accurate online tool.

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About This Tool

This BS to AD Date Converter allows you to convert dates from the Bikram Sambat (BS) calendar, used in Nepal and some regions of India, to the Anno Domini (AD) Gregorian calendar. The tool handles all complexities including varying month lengths (29-32 days), leap years in both calendars, and the 56-57 year offset between the systems. Simply enter a BS date with year, month, and day, and get the corresponding AD date with detailed information. The conversion uses a complete dataset of BS month structures and accurate algorithms for precise results.

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How to Use

Enter the BS date in the input fields: Year (1970-
, Month (1-
, and Day (1-32 depending on month).
Select the conversion direction (BS to AD is default).
Click the 'Convert Date' button to calculate the corresponding AD date.
View the converted date in the result section with details about both calendars.
Use the 'Copy Result' button to copy the converted date to your clipboard.

Frequently Asked Questions

Find Quick Answers

What is the BS calendar?

Bikram Sambat (BS) is a lunar-solar calendar used in Nepal and some parts of India. It starts in 57 BC (Gregorian) and has 12 months with varying lengths of 29-32 days.

How accurate is this converter?

The converter uses a complete dataset of BS month lengths and accounts for leap years in both calendars. It's accurate for dates between BS years 1970-2100 (AD 1913-2043).

Can I convert AD dates to BS?

This tool currently only converts BS to AD. For AD to BS conversion, a different algorithm would be needed due to the complexity of reverse calculation.

Why do BS months have different lengths?

BS is a lunisolar calendar where months are based on lunar cycles but adjusted to stay synchronized with solar years, resulting in variable month lengths from 29 to 32 days.

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