Few people know that Thomas Jefferson gave us our decimal money (10 dimes and 100 pennies)
If you care about metric system adoption, you really want to check out my post (10-12-22…National Metric Week) which includes my request to the U.S. House Subcommittee on Science, Space, & Technology for a hearing on the subject. You can see the 10-page report I submitted to Congress: https://milebehind.wordpress.com/2022/10/12/my-10-year-25000-report-to-the-house-subcommittee-on-science-space-technology-on-metric-system-adoption-in-honor-of-national-metric-week-october-10-2022/
1) It’s the system 95 percent of the world uses
(It’s not standard in the U.S., Burma, and Liberia)
2) It’s easier to make conversions
(You just move the decimal point right and left)
3) Teaching two measurement systems to children is confusing
4) It’s the language of science
5) It’s the language of medicine
6) Human conversion errors are inevitable
(We lost a Mars orbiter that way and pharmacy mistakes are common)
7) It’s the language of international commerce
8) Many hobbies and sports use the metric system
9) Its use is necessary for travel outside of the United States
10) So we look less foolish and ignorant to the rest of the world
And a few more for good “measure..”
11) Less clutter since you don’t need liquid and dry measuring cups and teaspoons and tablespoons
(Just a scale and liquid measuring cups)
12) It’s much easier to conceptualize 1 gram verses 1/28th of an ounce or 1 milliliter verses 1/29 of a liquid ounce (rounded measures)
13) There are fewer measures to learn. Most people will use meters, liters, and grams verses more than 10 for liquid and dry measures alone
14) It was designed to be easy to learn and use
(In 1790s Europe the literacy rate was around 60 percent)
More Than A Mile Behind: America and the Metric System 
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I am British. I have a complicated relationship with both imperial and metric units. I am old enough to have been taught solely the metric system at school; yet young enough to have been taught the imperil system (not that there is any such thing) at home. The United Kingdom of Great Britain and Northern Ireland also has a similarly complicated relationship with imperial and metric units, caused in the greater part by its accession to the European Economic Community on 1 January 1973.
I consider both metric and imperial units to be equally rubbish and equally arbitrary. Yet each has their place. To be clear from the start: all imperial units now have, and suffer from, the persistent and arbitrary shifting metric base.
I address the 14 points (a good imperial number) above.
1) It’s the system 95 percent of the world uses
Yes, it is. And it is good point. But that doesn’t necessarily mean that it’s a good system.
2) It’s easier to make conversions
That misses the point entirely.
1m X 10 = 10m
1 inch X 10 = 10 inches
12 feet X 10 = 120 feet
100 pounds X 10 = 1,000 pounds
Are you thinking of converting to something else, perhaps yards, chains or tons? And why would you do it if the base you have selected is appropriate to the length or mass you were measuring.
3) Teaching two measurement systems to children is confusing
Imperial and metric measurements are simply two different ways of expressing the same thing; two different languages. No child has ever suffered a detriment by being taught two different languages – and their conflicting number systems (think English and French).
4) It’s the language of science
It certainly is. Expect for when it comes to the big and the small. Astronomical units, parsecs, Planck length, and Planck time, for example
5) It’s the language of medicine
Except when it’s a foot 🙂
6) Human conversion errors are inevitable
Yes, of course they are. It makes no difference the system in which you are converting. But in the imperial “system” inches are not something you would ever consider converting to miles (it’s yards only – then decimal).
(We lost a Mars orbiter that way and pharmacy mistakes are common)
That was a verification error; nothing to do with the units used. It could equally have happened with metres and killometres.
7) It’s the language of international commerce
English is the language of international commerce.
8) Many hobbies and sports use the metric system
And many do not. No one has ever run a metric marathon. Has anyone ever purchased wheels for a racing – or any car, come to that – in centimetres?
9) Its use is necessary for travel outside of the United States
No, its absolutely not necessary. The imperial system is absolutely necessary if leaving the United States of America by air – all aircraft use imperial units.
10) So we look less foolish and ignorant to the rest of the world
Perhaps by speaking two languages: imperial and metric.
[The United States of America uses the metric system anyway, alongside “customary units” (imperial units), so it’s not such a big deal.]
And a few more for good “measure..”
11) Less clutter since you don’t need liquid and dry measuring cups and teaspoons and tablespoons
(Just a scale and liquid measuring cups)
What kitchen does not have teaspoons and tablespoons? And what good recipe book does not provide a conversion table?
12) It’s much easier to conceptualize 1 gram verses 1/28th of an ounce or 1 milliliter verses 1/29 of a liquid ounce (rounded measures)
Old world recreationals are still sold in ounces, at least in the UK, or fractions thereof. New world ones, I’ll let you have the grams.
13) There are fewer measures to learn. Most people will use meters, liters, and grams verses more than 10 for liquid and dry measures alone
So learning more is somehow bad? Never, never, never.
14) It was designed to be easy to learn and use
(In 1790s Europe the literacy rate was around 60 percent)
Yes, it was aimed at simpletons. And it shows.
Newton had no problem with imperial units.