Convert any date between Gregorian (AD) and Bikram Sambat (BS) instantly. Free, accurate for 2081–2083 BS. No login required.
Enter any AD (Gregorian) or BS (Bikram Sambat) date below and get the exact conversion instantly — including weekday, all output formats, and a batch converter for multiple dates. Covers dates from 2000 BS (1943 AD) through 2090 BS (2033 AD).
Today: 2026-08-14 · 2083-04-29 BS
Select the AD → BS tab in the converter above, then type your Gregorian date in any format —2025-05-24, 24/05/2025, or May 24 2025 all work. The converter returns the exact Bikram Sambat date, weekday, and all common output formats you can copy with one click.
As a rough manual estimate: subtract 56 years and 8½ months from the AD year. However, because BS months vary between 29 and 32 days, this estimate can be off by one day — always use the calculator for official documents, IRD filings, or legal deadlines.
Select the BS → AD tab, then enter your BS date as 2082-01-15 or 15/01/2082. As a rough manual estimate: add 56 years and 8½ months to the BS year. Again, the calculator gives the exact answer — critical when converting IRD tax deadlines or court dates that reference specific BS month-end dates.
The BS year is always approximately 56 years and 8½ months ahead of the AD year. So the year 2025 AD corresponds to BS year 2082 (from mid-April 2025). The exact offset shifts slightly across months because the Nepali new year (Naya Barsa) falls in mid-April — not January 1.
The Bikram Sambat (BS) calendar is the official civil calendar of Nepal, used for all government, legal, and financial purposes — including IRD tax filings, court dates, land registry, and official contracts. It is a Hindu solar calendar attributed to the reign of King Vikramaditya, with its epoch set at 57 BC.
The BS calendar has 12 months: Baisakh, Jestha, Ashadh, Shrawan, Bhadra, Ashwin, Kartik, Mangsir, Poush, Magh, Falgun, and Chaitra. Unlike the Gregorian calendar where month lengths are fixed, BS months vary between 29 and 32 days each year, determined annually by the Government of Nepal's Department of Printing.
The Gregorian (AD) calendar is a purely solar calendar with fixed month lengths. Bikram Sambat is a solar-sidereal calendar whose month boundaries are set by the sun's transit through the zodiac signs, resulting in variable month lengths. The total days in a BS year range from 354 to 365, meaning some BS years are shorter than a Gregorian year and some are longer.
The table below shows every month of BS year 2082, its length in days, and the corresponding start and end dates in the Gregorian (AD) calendar. Use this to quickly look up any month boundary without running a conversion.
| # | BS Month | Days | Start (AD) | End (AD) |
|---|---|---|---|---|
| 1 | Baisakh (बैशाख) | 31 | 14 April 2025 | 14 May 2025 |
| 2 | Jestha (जेठ) | 31 | 15 May 2025 | 14 June 2025 |
| 3 | Ashadh (असार) | 32 | 15 June 2025 | 16 July 2025 |
| 4 | Shrawan (श्रावण) | 32 | 17 July 2025 | 17 August 2025 |
| 5 | Bhadra (भाद्र) | 31 | 18 August 2025 | 17 September 2025 |
| 6 | Ashwin (आश्विन) | 30 | 18 September 2025 | 17 October 2025 |
| 7 | Kartik (कार्तिक) | 30 | 18 October 2025 | 16 November 2025 |
| 8 | Mangsir (मंसिर) | 29 | 17 November 2025 | 15 December 2025 |
| 9 | Poush (पुष) | 30 | 16 December 2025 | 14 January 2026 |
| 10 | Magh (माघ) | 29 | 15 January 2026 | 12 February 2026 |
| 11 | Falgun (फाल्गुन) | 30 | 13 February 2026 | 14 March 2026 |
| 12 | Chaitra (चैत्र) | 30 | 15 March 2026 | 13 April 2026 |
Total days in BS 2082: 365 · Nepal New Year (Naya Barsa) 2082: 14 April 2025 AD · Nepal New Year 2083: 14 April 2026 AD
Most users who need date conversion are working on financial documents, IRD filings, or legal paperwork that references Nepali BS dates. These guides may help: