Conversion formula [A.D.-B.S. or B.S.-A.D]

 

Formula for conversion of B.S. to A.D. and A.D to B.S.

B.S. - 56 years 8.5 month = A.D 

For example: 

if i forgot when Hospital pharmacy guidelines implemented in A.D. but i know in B.S. Then how to convert B.S. to A.D without using calculator or ani calendar. 

Formula: 

B.S. - 56 years 8.5 month = A.D 

Now, 

hospital pharmacy =2072 B.S 

Then,

2072- 56 years 8.5 Month = x

2015 Years = X 

Now in A.D. (2015) hospital pharmacy guidelines was implemented.