Pretty much, if I figured this correctly, you can just multiply whatever dose you'd normally use for Excel by 0.6 and get your Metricide-14 dose? Seeing as Metricide-14 is 60% stronger mL per mL. 1.5% for Excel, versus 2.5% for Metricide (1.5/2.5=0.6). Or at least get you pretty close to whatever you want to dose. I don't feel like making my own Excel, would rather just dose it straight.
Just ordered myself some. Ran out of Excel yesterday.