Why can't BS be converted with a simple formula?

Each BS month starts when the sun enters the next zodiac sign (a sankranti), so month lengths vary from 29 to 32 days and change from year to year. They come from astronomical calculation and the official calendar rather than a simple rule like Gregorian leap years, which is why converters use a table of month lengths.

Are future dates accurate?

Dates up to 2083 BS follow published official calendars. Later years use projected calendars, because Nepal's calendar committee publishes each year's calendar only shortly before it starts, so a future date can occasionally move by a day once the official calendar is out.

Roughly how many years ahead is BS?

Bikram Sambat is about 56 years and 8 months ahead of the Gregorian calendar. The new year, 1 Baisakh, falls in mid-April, so between January and mid-April the difference is 57 years.

Is my data sent anywhere?

No. Conversion happens entirely in your browser.

Nepali Date Converter (BS ↔ AD)

Convert dates between Bikram Sambat (BS) and Gregorian (AD), and work out date differences and age.

Today is …

Date

In ADTuesday, 14 April 2026

ISO2026-04-14

In Nepali१ बैशाख २०८३, मङ्गलबार

Covers 1975–2099 BS (13 April 1918 to 13 April 2043).

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How to Use

1Pick a tab: Convert, Difference or Age.
2For each date, choose BS or AD, then select the year, month and day.
3Read the result and copy it if you need it.

Features

Converts both ways: BS to AD and AD to BS
Days, weeks, months and years between two dates
Age from a BS or AD date of birth
Day of the week and date in Nepali script
Covers 1975–2099 BS (1918–2043 AD)
No upload, 100% in-browser

Example

Input

1 Baisakh 2083 BS

Output

Tuesday, 14 April 2026

Convert any date between Bikram Sambat (BS), the official calendar of Nepal, and the international Gregorian (AD) calendar, count the days between two dates in either calendar, and calculate age from a BS or AD date of birth. Useful for reading Nepali documents, filling in forms and planning around Nepali dates, entirely in your browser.

What Bikram Sambat is

Bikram Sambat (BS), also written Vikram Samvat, is the official calendar of Nepal. Government documents, citizenship certificates, school records, land papers, newspapers and many birth certificates in Nepal are dated in BS, and it is also used in parts of India for religious and cultural dates. Anyone dealing with Nepali paperwork, from an embassy or university admissions office to an employer checking a candidate's documents, regularly needs to translate those dates into the Gregorian (AD) calendar used internationally.

How the two calendars line up

BS is roughly 56 years and 8 months ahead. From mid-April to December, add 57 to an AD year to get the BS year; from January to mid-April, add 56. 2026 AD is mostly 2083 BS.
The year starts in mid-April. 1 Baisakh, the Nepali New Year, falls on 13 or 14 April.
Months are not fixed in length. BS months follow the sun's passage through the zodiac and run from 29 to 32 days, and the lengths change from year to year. That is why the calendar cannot be converted with a formula and why rough estimates are often a few days out.
Weekdays match. A given day is the same weekday in both calendars, which is a useful cross-check.

The twelve BS months

#	Month	Nepali	Begins around
1	Baisakh	बैशाख	mid-April
2	Jestha	जेठ	mid-May
3	Asar	असार	mid-June
4	Shrawan	साउन	mid-July
5	Bhadra	भदौ	mid-August
6	Ashwin	असोज	mid-September
7	Kartik	कात्तिक	mid-October
8	Mangsir	मंसिर	mid-November
9	Poush	पुस	mid-December
10	Magh	माघ	mid-January
11	Falgun	फागुन	mid-February
12	Chaitra	चैत	mid-March

Reading dates on Nepali documents

Official documents usually write BS dates numerically as year/month/day, for example 2083/06/19, often in Devanagari digits: २०८३/०६/१९. The month number counts from Baisakh, so month 06 is Ashwin, not June. Mixing this up is the most common conversion mistake. Enter the year, month and day here and the converter gives the exact Gregorian date.

Devanagari digit	०	१	२	३	४	५	६	७	८	९
Western digit	0	1	2	3	4	5	6	7	8	9

How accurate is it?

Dates from 2000 to 2083 BS follow Nepal's published official calendars. Earlier dates, back to 1975 BS, come from historical calendars that occasionally differ by a day between sources, and dates after 2083 BS are projected until the official calendar for each year is released. When a result falls outside the official range, the converter says so next to the answer.

Filling in a form that asks for your age in BS? Use the Age tab with your BS date of birth. It counts in Nepali months, which can differ by a day or two from an age worked out in AD.