View source for Talk:Salty Crackers/@comment-84.209.179.143-20180418185756/@comment-29936663-20180418224053

I believe that calculation is (calories from crackers) / (weight of crackers + weight of water necessary to restore the hydration lost)

Max hydration is 0.<span style="text-decoration:overline;">6</span> litres, so the weight of water to restore 20% of that is 0.1<span style="text-decoration:overline;">3</span> kg.

So (600)/(0.1 + 0.1<span style="text-decoration:overline;">3</span>) = 2571.4 cal/kg

That's slightly more than the 2400 cal/kg the article claims. Looks like they said 20% is .15 L not .13 L. I'll fix that.