# Making shortfills in 100ml bottle

Hi everyone,

I put this in beginners because it seems like a basic question which I’m sure people here would be able to help with. I’ve been making juices for about a decade but I’m starting to make stronger juices in order to gives to friends as shortfills. I use 100ml bottles and 20mg nic salt shots. I’m kinda reckless for my own needs and just chuck it in but I could do with knowing some actual figures now as my friends vape certain strengths (1.5mg or 3mg) and I don’t want to give them something too strong. It’s not important that the resulting e liquid will be slightly weaker/stronger in terms of taste, I put a decent amount of flavour in to begin with to compensate.

For the life of me, I can’t work out the resulting strength in these two scenarios:

90ml e liquid (80/20) + 1 bottle of 20mg nic salt shot (50/50)
85ml e liquid (80/20) + 1.5 bottles of 20mg nic salt shot (50/50)
80ml e liquid (80/20) + 2 bottles of 20mg nic salt shot (50/50)

I’ve tried to use online calculators but they don’t seem to cover what I’m asking. I see shop bought shortfills often come in 60ml bottles (with 50ml eliquid in them) or 120ml bottles (with 100ml e liquid in them).

I’m a bit old school and used to buy 500ml bottles of the 72mg stuff and kept in the freezer (before that tragic TPD event) so now I’m a bit clueless to be fair, spending like £1 for a 10ml bottle of useless strength nicotine.

Any help or a pointers in the right direction would be really appreciated, cheers

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I take it your nic salt shots are 10ml each.
Just under 1.5 nic shots will get you to 3mg/ml

And if you make the 85ml bottle, 1.5 nic shots will be just slightly over 3mg/ml

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90ml e liquid (80/20) + 1 bottle of 20mg nic salt shot (50/50) = 2mg/ml
85ml e liquid (80/20) + 1.5 bottles of 20mg nic salt shot (50/50) = 3mg/ml
80ml e liquid (80/20) + 2 bottles of 20mg nic salt shot (50/50) = 4mg/ml

Calculation for the 90ml option above:

Nic Total (10ml) / Total Volume (100ml) * Nic Strength (20mg)

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