Measuring out formula?

[SUNshineBlueSkye]

Hi, this may sound like a stupid question but I'm confused. I know putting formula in water makes it rise. I always measure out 240ml water and 8 scoops of formula makes the water rise to about 270ml (an extra 30 ml). Does that mean my baby is still getting 240ml or the 270ml if he drinks the full bottle? And if say he leaves some left over do I calculate the full left over or take away the extra 30ml? So if he leaves say 100ml. Does that mean he's drank 170ml or 140ml? I'm sorry if I doesn't make sense. Thanks.

I totally get the question (and not sure of the answer...) but not sure how much it matters?

Are there any concerns or issues that you need to track how much formula they are having?

With DS the first time round I religiously tracked everything on an app. When DD came realised that it didn't really serve a purpose and just added to the stress! If she repeatedly finished a bottle then would make it with another scoop next time.

To answer your question i did it with the pre-formula volume so 240ml in the example. Just do it the same way each time.

It makes sense. But as long as your baby is growing, it doesn't matter.

This is where I think old style ounces make much more sense as you fill to the line in fl oz and then add the equivalent number of scoops so 8 fl oz of water gets 8 scoops of powder! I know that’s not exactly your point but I always find it so confusing with ml…
As to your actual questions…
Yes you will have more volume of liquid after adding the powder but it doesn’t matter. You’d still call it an 8 ounce bottle, or 240ml if you insist on metric.
There’s usually no need to be tracking feeds in that detail past the newborn stage and I’m guessing your baby is older from the size of the feeds? If weight gain is steady then don’t worry about it. But if you’re often left with 140-170ml left over then I’d make smaller bottles to avoid wastage and when they’re being drained then make an extra ounce going forward.

The amount in the bottle is after you've mixed the powder and the water, which together make up the milk. If altogether after mixing 240ml of water and 8 scoops of powder, the bottle then shows 270ml of milk then that's the volume of the feed of milk. If he leaves 100ml, then he's drunk 170ml of milk.