Hoe to measure 55ml on a dr brown bottle

Mo

I need help figuring out where 55ml would be on his bottle, he’s on a gaining weight diet and im not sure how to measure it and i can’t find a measuring chart anywhere. I have mom brain that doesn’t let me figure out the most basic things 😅 please help I want to make sure I make his bottles right or how many Tablespoons is it ? Any info would really help ! Do the oz go by 10s?