USPS Weight Calculations

[Guest]

The client actually weighs their items in grams--each individual item can be quite small, though people generally order items in large quantities. There are over 800 products in the store.

 

We are shipping to the direct USPS connection for shipping. I believe this will be much more accurate over the long term. I've been able to express each product's weight as one ounce. I know that the USPS requires weights to be expressed as decimal fractions per pound--thus 8 ounces or 1/2 pound is expressed as 0.5.

 

My questions/problems are:

 

1) Does anybody know if I can express weight in fractions of ounces? As for example, 0.02 or 0.03? What's the smallest unit of measure the Post Office will accept?

2) The precision expressed in the database field for products_weight is two decimal places, as 0.00. Would I incur any disasters in altering that to three decimal places?

 

I love my home, but gee, it would be so convenient if we could actually finally convert to metric. :-)

 

Thanks in advance to all who read this,

 

Anne