How many hours' worth of O2, H2O, etc should I keep?

[Emre Yigit]

I'm aiming for storage enough to see me through 48 "hours", but I have no idea if that's too much or too little, in the event of dust storms, freezes, etc.

Also, is there an indicator of how much food is being consumed?

 

[Thorin]

2 sol is more than enough supply.
You need 1 food per day per 6-7 colonist.