I was setting up a spreadsheet and this isn't a toughie, but I was feeling insecure about my factors. I wanted to figure (both directions) for 1:50 and 1:100 concentrates.....what would the 500ml test batch conversion factors be. I'm speaking of mixing up 500ml working solutions to tweak formulas that will later be made into concentrates? Also, going the other direction, if I want to tweak a known concentrate what is the conversion factor to the 500ml. I'm feeling like I'm looking at this in some way that is making it more complicated than it is as one can scribble this out on paper readily enough but I was having trouble simplifying for a single spreadsheet factor.