Hi looking for a bit of advice please,I entered a comp and won a litre of premixed pg/vg 30/70
and cannot find a calculator that can be adapted to use this base my nic is 100 pg as are my concentrates so I guess that after adding them any mix should come out at about 45/55 ish,
using a e-liquid calc adding my concentates and nic and the adding to amounts for pg/vg together and then that quantity of premix will come pretty close, has anyone else used premixed dilutants and how did you calculate to quantities to add?

Are you aiming for a precise PG/VG-ratio? Or do you just want to know what ratio the final is?

First make your recipe, and checkmark â€śMax VGâ€ť:

This should get you something like:

In this case 83% of it is VG, 30% of that is PG, so 24.9% PG and 58.1% VG.
Add the PG to the PG-part of the ratio, and subtract from VG. In this case it reads 17/83 - so 17+24.9 : 58.1 or rounded: 42/58â€¦