Formula quesfion

Hi all!

So I was never able to breastfeed though we certainly tried our best. We’ve been on the formula train since and doing great.

My only question is, when it’s 1 scoop per 2 oz of water... and the created amount equals to more than just 2 oz... say it makes now 2.5 oz mixed... are we feeding baby 2 oz or 2.5?

Trying to figure out how to calculate it per feeding and wonder if I’m under feeding.

We pre make the formula in 8 oz bottles. So it comes out to like 9 oz or something. Then when we need it we will pour 5 oz into a bottle.

Hope my question makes sense. I’m new to the formula thing. Thanks!