Energy consumed by weight of gear on a multiday hike

I'm trying to figure out how many extra kcal I would burn on a 600km hike with a 30,000m (30km) positive gain for every additional 100g (or 1kg, whatever) of gear in my backpack.

It would obviously be a quite rough approximation, as there are significant variables such as the efficiency of a human body which must be around 20% and the fact that the weight is not only lifted vertically but also swinging around.

Any idea of a calculation that wouldn't be too wrong?

Thanks

Thanks

It looks like every additional kg on a 6h hiking day (3h going up, plus some energy for the flat parts and downhills) with a 10% grade would add ~200 kcal, which doesn't sound totally off, but I expected more.

That's another interesting calculator
https://www.outsideonline.com/outdo...acking/ultimate-backpacking-calorie-estimator

So, if the trip lasts about 24 days, every additional kg of gear would potentially require 4800 additional kcal

It also depends whether you want to lose weight on your hike.

https://en.wikipedia.org/wiki/Military_of_ancient_Rome

Logistic requirements/supplies/food same fifteen-twenty centuries ago as today.

freeelectron said:

It looks like every additional kg on a 6h hiking day (3h going up, plus some energy for the flat parts and downhills) with a 10% grade would add ~200 kcal,

Just for the log: simply by a wrong packaging or an inconvenient shoe you'll be off to the calculation by lot.
Not really an issue for a short hike but you also mentioned 24 days, and that makes safety margins a really tricky problem...