How to convert BS ↔ AD dates for official forms in Nepal
Almost every important form in Nepal still uses the Bikram Sambat (BS) calendar: citizenship certificates, passport applications, bank KYC, land deeds, school and exam forms, and many employment contracts. The rest of the world (and most software) uses the Gregorian calendar (AD / CE). You regularly need to convert one into the other.
This page explains when you need the conversion, what to watch for, and points to a free tool that does the conversion correctly in your browser.
When you need BS ↔ AD conversion
- Citizenship and national ID — birth date is recorded in BS.
- Passport and visa forms — often ask for both, or for AD while your documents show BS.
- Bank and insurance — KYC and claim forms frequently use BS.
- Land and property — registration dates and owner details use BS.
- School, PSC, and exam applications — birth date and application date in BS.
- Contracts and affidavits — dates of agreement or notarisation in BS.
Quick method (recommended)
Use a verified online converter that covers the range used on everyday Nepali documents (roughly BS 2000–2090). Enter the date on one side; the other calendar updates immediately.
Runs entirely in your browser. No sign-up. Works offline after the first load. Built for Nepal forms and bank use.
Open BS ↔ AD date converter →Related helpers on the same site:
- BS Age Calculator — exact age in years, months and days from a BS birth date
- Today’s Nepali date — current BS date with day name and tithi
What to double-check
- Month lengths are not fixed. BS months can have 29–32 days depending on the year. A good converter uses an official table, not a simple “add 56 years 8 months” rule.
- Year boundary edge cases. A few days near the start or end of a BS year can differ by one day across sources. For legal documents, verify against the calendar used by the office (or a known good converter).
- Write both when space allows. On international forms it is safer to put the AD date and, if there is a remarks field, note the original BS date as printed on the certificate.
- Keep a screenshot or printout of the conversion if you are submitting a critical application — some offices still prefer a handwritten conversion note.
Why not just add 57 years?
The rough difference between BS and AD is about 56–57 years, but the exact offset changes because the Nepali new year falls in mid-April and month lengths vary. Using a fixed offset will be wrong for many dates. Always convert with a proper calendar table.
Summary
For citizenship, bank, passport and contract forms in Nepal you will keep converting between Bikram Sambat and Gregorian dates. Use a reliable browser tool, check edge days for legal work, and keep both dates when the form allows.