Hi Folks

Unless I have been doing it wrong...here is how I get my totals. Everything has cured in the proper time so I think I am doing it correct.    First figure out how much total resin you need then divide that number by the mix ratio... Example....if you need 550 grams total and you have a 100:30 mix ratio divided 550/1.3=423.07 grams of resin.  So then fill a cup to 423g of resin then fill with hardener to 550g. 

If you happen to go over the amount of resin you were sopose to like say you end up with 432g of resin just multiply that by the mix ratio for the new total. example....432x1.3=561.6 total.

Also if you need to figure how big of a cup you will need to mix in just multiply the total resin by .035274 This will give you how many ounces that amout of resin is.  example.....550grams = 19.4oz  

hope this helps,

 Dennis