“Never gonna happen.”
It should, and it probably will.
The reason is the ease of most calculations. For instance, if I ask how much 500 cubic feet of water weighs, you’re going to have to go through some contortions to figure it out.
On the other hand, if you ask how much 500 cubic decimeters of water weighs, the answer is instantly known - 500 kg (a cubic decimeter is also one liter). For 500 cubic meters of water, the answer is 500 metric tons. Since density is expressed in terms of water, answers are equally easy for other materials.
The ease of calculation is the same regardless of the type of unit, which is why metric is the standard in science and engineering.
Switching to metric would also eliminate a ton of barriers to trade, both import and export.
It’s getting to the point where the cost of retooling is outweighed by the advantages.
Don’t try to talk reason to a real amurikan.
If you read through the comments, the vehemence in which FReepers have responded to the very idea,you’ll understand why I say, it’s never gonna happen. Other than your own isolated enthusiasm for the Metric System, I haven’t found anyone that shares the same sentiment as you.
Of the top of my head 31,000lb. fresh, 32,000 salt. (That wasn't hard.) For greater precision, I'd need the temperature and have to look stuff up, and use a caluculator - but I'd have to do that in French units too.