Can you mix nic salt with freebase e-liquid? Yes: the maths
Yes, nic salt and freebase mix. The strength maths, and what NMR studies of free-base nicotine suggest about how harsh the blend will feel.
Yes, you can mix nic salt with freebase e-liquid. The blend’s nicotine strength is the volume-weighted average of the two: 5 ml of 20 mg/ml plus 5 ml of 6 mg/ml gives 13 mg/ml. How harsh it feels is harder to predict, as it depends on how much nicotine ends up in free-base form.
This is an evergreen explainer, not news. This desk read the Duell, Pankow and Peyton abstract in Chemical Research in Toxicology (2018) and their 2020 Tobacco Control paper on 4 October 2026.
| Mix | Blend strength | Nicotine from the salt |
|---|---|---|
| 5 ml 20 mg/ml salt + 5 ml 6 mg/ml freebase | 13 mg/ml | 77% |
| 10 ml 20 mg/ml salt + 10 ml 3 mg/ml freebase | 11.5 mg/ml | 87% |
| 2 ml 20 mg/ml salt + 8 ml 3 mg/ml freebase | 6.4 mg/ml | 63% |
Can you mix nic salt with freebase e-liquid and get a middle throat hit?
Shop copy promises a hit in between; none of the three retailer pages read for this post cites a measurement for it.
The 2018 study used NMR to measure the free-base fraction, the share of nicotine in the volatile form, and reported 0.03 to 0.84 across the e-liquids tested. A 2019 correction exists; this desk did not read it. The 2020 paper puts first-generation freebase liquids at about 1, ten JUUL pods on sale in October 2018 at 0.12 at 40 C, four bottled salts between 0.01 and 0.08, and seven non-salt bottles from 0.08 to 0.98. “Freebase” on a label is not one number.
The same paper says a salt’s free-base fraction depends on the ratio of acid to nicotine, plus temperature and solvent. What follows is reasoning from that, not a measured blend. The salt usually supplies most of the nicotine (right-hand column), and its acid does not leave when freebase arrives, so the mix should sit nearer the salt than the volume split suggests.
What to check before you blend
PG/VG averages the same way: 5 ml of 50/50 into 5 ml of 70/30 gives 60/40. All of it assumes both bottles hold what the labels say, one reason recall notices are worth reading. Our shelf-life review covers how each format ages, and this piece why salts became the default.
FAQ
What happens if you mix salt nic with regular juice?
You get a liquid whose strength is the volume-weighted average of the two labels. Its throat feel depends on how much nicotine stays free-base. No source read here measured a blend, but a salt’s free-base fraction depends on its acid-to-nicotine ratio, and the salt usually carries most of the nicotine.
Is it bad to mix nic salt and freebase?
The main risk is misjudging strength. A few millilitres of 20 mg/ml salt lifts a low-strength freebase sharply, and acid-moderated nicotine can feel smoother than its dose. The 2018 authors judged liquids pairing high total nicotine with a low free-base fraction likely to be particularly problematic for public health.
How do you calculate nicotine strength when mixing e-liquids?
Multiply each liquid’s strength by its volume, add the results, and divide by the total volume. For 10 ml of 20 mg/ml salt and 10 ml of 3 mg/ml freebase, 200 mg plus 30 mg is 230 mg, over 20 ml, which is 11.5 mg/ml.
However it is blended, the bottle delivers nicotine, an addictive drug. This bench writes for adults who already vape; if you do not, none of this is a reason to start.