Ounces vs. fluid ounces

Alibaeee

So lately, I just figured out the different between ounces and fluid ounces. Meaning I've been measuring my food wrong and I'm curios about the calories I've been in taking. 1 cup of ceral is 110 calories. I've been measuring 1/2 cup of calories in a liquid ounces and making it 55 calories. Would the weight ounces make a difference ?? Along with other food? Like I measured half a cup of corn too.