AD to BS Date Converter | BS to AD Date Converter | Bulk Nepali Date Converter

If you've ever needed to convert a date from the English calendar to the Nepali one — or the other way around — you know it's not as simple as adding or subtracting a fixed number. That's because Nepal uses the Bikram Sambat (BS) calendar, which runs roughly 56 years and 8 months ahead of the Gregorian (AD) calendar most of the world uses. So AD 2025 is currently BS 2081 or 2082, depending on the month.

This converter handles both directions — AD to BS and BS to AD — instantly and accurately. You don't need to worry about date formats either. The tool auto-detects common formats like YYYY-MM-DD, DD/MM/YYYY, DD-MM-YYYY, YYYY.MM.DD, and DD.MMM.YYYY, so you can paste dates however they come.

Need to convert a whole spreadsheet worth of dates? The bulk mode lets you paste hundreds of dates at once — one per line — and converts them all in a single go. The supported range covers AD 1918 to 2100 and BS 1975 to 2157, making it suitable for historical records, current documents, and future planning alike.

How to Use the Date Converter

1. Pick a direction: Choose whether you're converting AD to BS or BS to AD.
2. Type or paste your date: Works with YYYY-MM-DD, DD/MM/YYYY, DD-MM-YYYY, MM/DD/YYYY, YYYY.MM.DD, or DD.MMM.YYYY — the tool figures out the format for you.
3. Or use the date picker: Click the calendar icon to select a date visually if you'd prefer.
4. See the result instantly: The converted date appears right away, no button to click.
5. Bulk mode: Switch to bulk conversion, paste multiple dates (one per line), and convert them all at once.
6. Export your results: Copy the output to clipboard or download it for use in Excel, CSV files, or reports.

Supported Date Formats

• YYYY-MM-DD (e.g., 2025-02-12)
• DD/MM/YYYY (e.g., 12/02/2025)
• DD-MM-YYYY (e.g., 12-02-2025)
• MM/DD/YYYY (e.g., 02/12/2025)
• YYYY.MM.DD (e.g., 2025.02.12)
• DD.MMM.YYYY (e.g., 12-Feb-2025)

Why the Two Calendars Don't Match Up Neatly

The Bikram Sambat calendar — also called Vikram Samvat — is Nepal's official calendar. It predates the Gregorian calendar by about 56 years and 8 months, which is why BS years look so much larger than AD years. Right now, for instance, while most of the world is in 2025, Nepal is in BS 2082.

A Few Things That Make BS Different

• The Nepali New Year falls around mid-April in the Gregorian calendar (Baisakh 1).
• BS months don't have fixed lengths — they vary between 29 and 32 days, and those lengths change year to year.
• The twelve BS months are: Baisakh, Jestha, Ashar, Shrawan, Bhadra, Ashwin, Kartik, Mangsir, Poush, Magh, Falgun, and Chaitra.
• A single AD date can fall in two different BS years depending on whether it's before or after Baisakh 1.

How the Conversion Engine Works

Because BS month lengths are irregular and don't follow a simple mathematical formula, this tool uses a verified lookup table of official Nepali calendar data covering BS 1975 through 2157 — that's over 180 years of accurate date mappings. Every conversion is looked up against this table, which is why the results are reliable enough for government forms, bank records, and legal documents.