TROY
 
Updated: 01 December 2008 
Use TROY to convert from drams, grains, grams, hundredweights, ounces, pennyweights, pounds, stones, tonnes, tons, troy pounds, or troy ounces to troy ounces.
Syntax
SELECT [westclintech].[wct].[TROY] (
  <@Weight, float,>
 ,<@From_scale, nvarchar(4000),>)
Arguments
@Weight
is any real number. @Weight is an expression of type float or of a type that can be implicitly converted to float. 
@From_scale
is the description of the units for @Weight. @From_scale must be a valid value as specified in weight unit representations. @From_scale must be of a data type that is implicitly convertible to varchar. 
 
Return Types
float
Remarks
·         The following table is a representation of the conversion of one of the weight units of measure into troy ounces:
    
        
            | grains | 0.00208333333 | 
        
            | drams | 0.0569661458 | 
        
            | ounces avoirdupois | 0.911458333 | 
        
            | pounds avoirdupois | 14.5833333 | 
        
            | stones | 204.1666662 | 
        
            | hundredweights | 1458.33333 | 
        
            | tons | 29166.6666 | 
        
            | pennyweights | 0.05 | 
        
            | ounces troy | 1 | 
        
            | pounds troy | 12.0000000 | 
        
            | grams | 0.0321507466 | 
        
            | tonnes | 32150.7466 | 
    
 
·         Conversion of grams includes all the standard prefixes with kilo representing 1,000 and yocto representing 10E-24.
Example
 
select wct.TROY(100, 'lbs')
Here is the result set
----------------------
1458.33333
 
(1 row(s) affected)