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by pavel_lishin 2545 days ago
> with a 3 year old

This was my first thought. The calculator is fine, but not all free time is equal. If the kid's having a not-great night, and is _finally_ asleep by 10pm, I theoretically have an hour before I have to go to sleep, but I'm tired and realistically I'm just going to click around for awhile before going to bed. Ditto if I'm up at 6:30; I theoretically have 30 minutes, but who knows when the kid'll wake up. Maybe I have 30 minutes, maybe I have zero.

It's as if free time had a half-life.