Just in case you get the courage to do it.
Here is what I do.
Take a pour spout you would use on a booze bottle, 'I use the plastic one that comes on the 1/2 gallon bottles.
A 4 count is a shot or 1.5 oz's.
Then you can break it down into quarters by counting to 1 and so on.
This is how I measuer fertilizer for my plants.
Very accurate.
Worth