How do you begin to calculate the calories burned riding a 30-lbs bike on a smooth, flat surface for 1 mile versus walking this distance with a 30-lb backpack?
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Just use an online calculator. But counting calories for any purpose outside of academia is pointless as the closest you’ll ever get is a really good guess. For an idea though, you burn about 100 calories walking a mile (between 95 and 110 or so at this weight). Biking that would burn probably 25 or so, tops. Bike weight is essentially negligible (though a 30-lb bike is insane), as you aren’t carrying it–it literally rolls on the ground.
You could actually measure it in a lab by collecting your breath in a Douglass bag and analyzing how much CO2 you produced.
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