How many drops in 10ml liquid?

Question

Trying to work out how to add 3% of essential oil into a carrier oil, and the bottle holds 10ml.

Already tried filling the bottle with water and counting the drops emptying, but the water - interestingly enough, right - wouldn't pass through the dropper.

Any ideas..?

Thank you

P.S. - It was a toss up between physics, mathematics and chemistry categories..:)

Answer 1

It would vary by the viscosity and density of the liquid. For instance the oil would need more drops then say corn syrup to fill the same volume.

I assume you're mixing this on a bottle by bottle basis so making up a batch of 97ml carrier oil and 3ml essential oil then using that to fill 10 bottles isn't an option.

A quick search shows drops per ml on automated IV equipment varying from 10-16 drops per ml. Not much help there, though I suspect an oil would be towards the high end of that measurement.

Answer 2

Take it we don't have a micro-pipette then?..OK this is tedious..but it works. Get a dropper and fill your 10ml bottle with water..1 drop at a time..count the drops..say it's 167.
That means each drop is approx 10/167ml=0.06ml
You want 9.7ml carrier oil..that's 162 drops (9.7/.06)
and 0.3ml essence thats 5 drops (0.3/0.06)
All you have to do in the calculation is substitute the ACTUAL number of drops to fill the 10ml bottle. Good luck and a steady hand!

Answer 3

20

Answer 4

It's a very strong function of the density, viscosity, and surface tension of the liquid, but the general rule of thumb is 1 mL is about 1 drop.

Doug

Answer 5

3% of 10 ml is 0.3 ml

20 drops are 1 ml, so 1 drop is aprox 0.2 ml

I suggest you to add 1 or 2 drops to this bottle

Ana

Answer 6

Well, 3% of 10ml is 0.3ml, that's a tiny amount. So I would say about 3 drops should do it.

Answer 7

drops wont work as size varies. you actually need to measure for correct ml.