Date Conversion formula AD To BS

To convert Bikram Sambat (B.S.) to Anno Domini (A.D.) and vice versa without using a calculator or calendar, you can use the following approximate formula:

Formula for Conversion:

$$B.S. - 56 \text{ years } 8.5 \text{ months} = A.D.$$ $$A.D. + 56 \text{ years } 8.5 \text{ months} = B.S.$$

This formula is based on the difference between the Bikram Sambat (B.S.) calendar and the Gregorian calendar (A.D.), which is approximately 56 years and 8.5 months.

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Example Conversion (B.S. to A.D.)

If the Hospital Pharmacy Guidelines were implemented in 2072 B.S., we calculate:

$$2072 - 56 \text{ years } 8.5 \text{ months}$$ $$= 2015 \text{ A.D.}$$

So, the Hospital Pharmacy Guidelines were implemented in 2015 A.D..

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Example Conversion (A.D. to B.S.)

If an event happened in 2000 A.D., to find the B.S. year:

$$2000 + 56 \text{ years } 8.5 \text{ months}$$ $$= 2056 \text{ B.S.}$$

So, an event in 2000 A.D. corresponds to 2056 B.S..

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Key Takeaways

• To convert B.S. to A.D.: Subtract 56 years and 8.5 months.
• To convert A.D. to B.S.: Add 56 years and 8.5 months.
• This method provides an approximate conversion, which is accurate in most cases.