You really can’t. Human labor is productive, a barrel of oil on its own isn’t going to accomplish crap.
You likely get less useful work out of a gallon of gas in your car than it took to extract, refine, transport, and distribute that gallon of gas. Just as an example gas pumps use electricity that isn’t coming from oil.
Sure, of course there are a lot of losses along the way going from crude in the ground to gas in your car's tank.
This whole thread was about productivity in terms of hours spent by the last person in the chain, the farmer. They can do drastically more today in terms of food production because they can leverage the potential energy in oil to replace human labor, and in that metric all of the externalized costs are ignored.
> because they can leverage the potential energy in oil to replace human labor
Nope, what’s being replaced is animal feed used for animal labor. People didn’t pull a plow by hand and then suddenly swap to tractors.
For thousands of years farmers used sunlight > animal feed > domesticated animals, there’s nothing special about oil here.
Track the in oil energy for a tractor vs the sunlight to grow plants to feed a pair of horses and the tractor is using wildly less energy per year to get vastly more done. You can even make it more obvious by using solar panels in the same fields feeding horses 100 years ago to charge an electric tractor. Oil is cheap, but not necessary there was even wood and coal burning tractors in the early days.
PS: Horses can apparently digest the cellulose in sawdust from several types of trees. It’s unhealthy in large quantities but kind of an interesting fact.
Nah, it's not 100% but it says a lot about the nutritional value.
> inputs
You can approximate those with price. A barrel of oil might be a couple hours.