Measure human height by the transitive property. Stand up against the wall and make a mark at your height. Then measure the distance from the floor to the mark. You are as tall as the mark is above...
From personal experience, it is innacurate. For me I got my height measured as 5'10 at the doctors, but when I measure myself at home with a tape meter it says I am 5'9, a full 2.50cm difference.
The interpretation of "morality" is subjective and cannot be quantified.
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Actually, morality can be measured by the "harms" involved in any given action. for instance, it's not moral to kill...