I use e-juice me up too, but ... when I am only making 3ml testing sizes, I use drops, as the measurments are very small.
Point is .. what I do is count how many drops of each additive I use, that it takes to equal 1ml.
I write each one down.
My base nicotine base is 28, my PG is 23, my VG is 18, and my flavoring is 32
Then I print it out my recipe using my base for the drop count in the box.
Then I go back to the calculator, change the count in the box to equal the count of each additive ..and make the correction on my print out for each one.
Works for me on small amounts.
The e-juice me up calculator defaults 20, and there's no way each additive is equal to 20 drops per ml
Hope this makes sense to you.
I never make a big batch of juice until I've tested the flavor in a small batch first.