Mixing E-Liquids with Different Nicotine Concentrations: What Happens?

First Scenario

- I have a 60ml bottle with 30ml of e-liquid left with 6mg/ml of nicotine concentration.
- And I have a 60ml bottle with 30ml of e-liquid left with 12mg/ml of nicotine concentration.

I want to mix them together, but I don’t know what nicotine concentration I will end up with?

Explanation

To make things easier, we will try to calculate the exact nicotine quantity instead of just the concentration.
That way we will know how much nicotine is there in each e-liquid. We will multiply the nicotine concentration by the volume of each bottle.

- 30ml * 6mg/ml = 180mg of nicotine in the first bottle.
- 30ml * 12mg/ml = 360mg of nicotine in the second bottle.

When you pour the contents of the first bottle into the second, you'll have a total of 60ml of e-liquid containing 540mg of nicotine (180mg + 360mg).

Now, to determine the resulting nicotine concentration, divide the total nicotine quantity by the total volume of e-liquid: 540mg / 60ml = 9mg/ml.

Hold on a minute, what if we have different quantity of e-liquid with different concentration.
Does that gives the same concentration ? Let’s try and find out if this is the case!

Second Scenario

- I have a 60ml bottle with 22ml of e-liquid left with 6mg/ml of nicotine concentration.
- You have a 60ml bottle with 34ml of e-liquid left with 12mg/ml of nicotine concentration.
- You want to mix them together, but you want to know what is the resulting nicotine concentration.

Explanation

- 22ml * 6mg/ml = 132 mg of nicotine in the first bottle.
- 34ml * 12mg/ml = 408 mg of nicotine in the second bottle.

If you pour the first bottle into the second one, we’ll have 56ml of e-liquid. Let’s see what the concentration will be in that case :

- 540mg / 56ml = 9,64 mg/ml

We can clearly see that the resulting concentration is higher than in the first scenario where we had equal quantities of both e-liquids.
The logic is simple: when you multiply the nicotine concentration by the e-liquid quantity, you get the total amount of nicotine in the e-liquid.
Having more of the e-liquid with a higher concentration results in a higher nicotine content and concentration in the final mixture.

If we have a bigger quantity of the e-liquid with a higher nicotine concentration we have more nicotine added to the final e-liquid and the concentration will be higher.

I hope this helps ;)

If this seems confusing or if you're not a fan of math, don't worry! I have created a user-friendly calculator called Eliquid.diy that can assist you in making any necessary modifications to your e-liquid.
Give it a try and feel free to provide feedback. I'd love to hear your thoughts!

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dib258
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