How many miles per gallon can you get riding a bicycle and fueled by beer?

It's impossible to answer precisely, since there are so many variables (weight, speed, terrain, type of beer) so I can only give a very approximate answer. Cyclists burn anywhere from 300 to 1,000 calories per hour, so at 15 mph let's say you burn about 20 calories per mile. (That's working moderately hard; it's about 5 times more efficient than running the same distance.) Beer is about 100 calories per cup, or 1,600 calories per gallon.

(Compare to gasoline, which is 31,000 calories/gallon). Multiply that out, you get about 80 miles to the gallon. That seems remarkable, but remember that a car has to move the car itself, which weighs at least 10 times what a human does (and as much as 20 times).

The weight of a bicycle is negligible; the weight of the car is most of what you're moving. A motorcycle regularly gives 80 miles per gallon, and it's still far, far heavier than a bicycle. Gasoline engines are also optimized for high speeds.

You can't get a human-powered bicycle to go 65 MPH no matter how much beer you drink. What we're really looking at is the remarkable efficiency of a bicycle.In physics terms, it actually takes no energy at all to move horizontally. All you have to do is overcome the friction.

A car has a lot of friction, and a good bicycle has remarkably little. Once up to speed you can coast a long way without pedaling, using no calories at all. However, require a lot of work, and you'd use at least 4 times as much energy on hilly terrain, dropping your efficiency to a mere 20 mpg.

That's an interesting question :) I've seen biker riders making very frequent stops to drink a beer, giving me the impression that you don't get far one one beer. Additional question: when you ride a bike with a battery, electric helper engine and brake energy recuperation, will that make you a hybrid? And what will that do to the mpg figure?

Anyway, don't fill up the tank completely or you'll get nowhere.

Firstly don't drink and drive and beer doesn't give so much energy as a glucose drink.

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