I have also been DIYing for a few years now. Use a ejuicemeup tool/app thingy which is handy for calculations of all sorts. And you can save your recipes. Also use a scale, best and easiest way to do it in my view. Syringe for Vit N though. And DIYORDIE is a great youtube channel as laurie9300 has pointed out.
I'd second laurie9300 s suggestion of mixing by weight. Only discovered this relatively recently in my vaping journey, but it saves a great deal of time, and messing around compared to the alternatives. Wish I'd discovered it much sooner. 👍
Mixing by weight may not be as useful when making very small volume batches, or getting precise with tiny amounts of flavour concentrates. Unless you have some über accurate electronic scales, that is.
In most situations though, you can always just mix larger amounts of the same recipes, as the quantities are all relative. No harm, no foul.
I was aware of the weight vs volume differences and I agree that weight would definitely be the more accurate of the two methods. However, I will go with volume for now as it should be accurate enough for me as I will be using a relatively low (24 mg/ml) nicotine base. So long as I record my ingredients and maintain consistency that method should be suitable for me. [Although I can store such chemicals in airtight containers within a lockable wine cabinet (as I do with my pre-mixed e-liquid) I am simply not comfortable with higher mg/ml for safety reasons (although I'm in my fifties I have young children; and kids in general tend to do silly things no matter how smart they are). Better to be safe than sorry and I'd be very sorry indeed if my peaceful vaping past-time caused them any harm.]
I downloaded it to my PC and have been testing various functions of it this morning. It seems to be very good to me and probably what I will use as I can have the information permanently stored on my PC and print out recipes as hard copies.
If your on windows and wish to save, use the online calc like normal. When your done hit the Print Screen button on your keyboard that willl copy the screen to the clipboard. Open Paint and press Ctrl + V. Trim what shit you dont need, Hit save and Done
quaama, Nice to see you've considered what is safe in your circumstances. Generally, for long term storage people recommend diluting with PG, and then add the VG when making batches.
also note milligram per millilitre is not the same as percent. That is 1mg/mil is not 1%
I highly recommend you learn the maths, and at least check the calculators results. If the 2 don't match do it again. Its all too easy to enter garbage into a calculator, and not end up with what you expect
I understand the difference between mg/ml and percentages.
Most of the maths I can 'do in my head' (e.g If I have a 50ml of 50/50 PG/VG of 24 mg/ml nicotene base and I add in 50ml of VG I'll have 100ml of 25%PG/75%VG at 12mg/ml). I generally have a rough idea of what the answer will be before I put it into the calculator: I just wanted the calculator to confirm my own estimate and provide an exact answer (and one I can keep a record of the recipe should it be a success and I want to duplicate it).
I know what you mean when you say "Its all too easy to enter garbage into a calculator, and not end up with what you expect" from my work days - Garbage in, Garbage out. I would be presented with something to authorise and when I told them the answer was wrong (I could often see just from briefly looking at it), I would be assured by the staff member that it was the answer the computer gave (and that they had simply printed out). [Generally it was some obscure thing wrong with the computer program that no-one could either fix, rectify within a reasonable time or be bothered to do so.] Some would get most annoyed with me when I had them go back, work it out manually and then show me the work before I signed off on it [sometimes they'd go over my head and get some other dopey boss who would simply sign it without question]. This occasionally happens with cashiers in shops too: I'll be given a price or provided with change which is obviously too much or too little and they seem perplexed when they are questioned on it because "that's what the computer (electronic till) said on the screen.