EJuice Recipe CALCULATOR App

How to make your own vape juice

Mixing your own e-liquid is simpler than it looks — it comes down to a few measurements and a little math, and the calculator handles the math for you. You combine liquid nicotine, propylene glycol (PG), vegetable glycerin (VG), and flavor concentrates — all available in our DIY supplies. If you're working with nicotine, take your time and follow the steps carefully.

The online calculator above needs no instructions — just fill in the fields. The steps below walk through the downloadable desktop app screen by screen.

Step 1 — Decide your targets

Before you open the calculator, decide on these four things:

1. Bottle size (how many mL you want to make)
2. Target nicotine strength (mg/mL)
3. Flavor percentage (up to 10 different flavors)
4. PG/VG ratio

Step 2 — Set your nicotine base

The calculator defaults to a 50/50 PG/VG nicotine base, but nicotine from Central Vapors is sold in either 100% PG or 100% VG base. Change the PG or VG field to 100 depending on which base you have. The example below uses 100% VG nicotine.

Step 3 — Confirm your nicotine strength

Nicotine from Central Vapors is 100 mg/mL. Make sure that value is entered in the nicotine strength field (highlighted in yellow). If you're using nicotine from another retailer, check the label and update this field accordingly.

Step 4 — Enter your target nicotine level

Enter your desired finished nicotine strength in the mg/mL field. For this example we're making a 3 mg e-liquid, so enter 3. Keep finished DIY e-liquid at 24 mg/mL or below.

Step 5 — Enter your bottle size

Enter your total batch size in the mL field. For this example we're making a 30 mL batch, so enter 30.

Step 6 — Enter your flavor percentages

Enter a percentage for each flavor you're using. You can add a flavor name if you want, but it's optional. The calculator supports up to 10 flavors. For this example we're using 10% strawberry and 10% banana for a total of 20% flavoring.

Step 7 — Set your PG/VG ratio

Enter your target PG/VG ratio. The two values must add up to 100. Keep in mind that flavoring is PG-based, so your PG percentage can't be lower than your total flavoring percentage — if you have 30% total flavoring, your PG can't go below 30. For high-VG "Max VG" mixes, it's normal for the recipe to call for zero added PG. For this example we'll use a standard 50 PG / 50 VG ratio.

Step 8 — Calculate and mix

Click Calculate. Your recipe appears on the right in mL, drops, or grams — whichever unit is easiest to work with. Measure everything out, give the bottle a thorough shake, steep if needed, and you're done.

PG vs VG — what's the difference?

PG (propylene glycol) and VG (vegetable glycerin) behave differently in e-liquid, and your ratio changes how the finished juice feels and tastes. Here's a quick comparison:

Measuring tips

When measuring small batches in drops, roughly 20 drops equals 1 mL — though this varies with liquid thickness. Thicker VG-heavy mixes produce larger drops, so drops-per-mL will be lower. For the most accurate results, use a graduated syringe or cylinder rather than counting drops.

For use by adults 21+. Nicotine is an addictive chemical — handle and store liquid nicotine with care, and keep it away from children and pets.