Asklemmy

Atleast 8. Gotta have two per room

Around four from my various retail jobs in the past. They're all incredibly dull by now though

At least two. We just moved into a new place and we know where two are.

2

None. But I have an excellent folding utility knife with exchangeable blades.

Two or three. I often wish my lazy neighbors would ask to borrow one when they stuff large, unflattened boxes into their recycling barrels. #BurnAFuckingCalorie

Like 3 or so, I ship stuff

The simple box cutters with replacement blades? Three.

However, I have a couple hundred objects that can be used to cut boxes :)

One in the toolbox in the garage. But it rarely gets used since I always have my Leatherman on me.

None. I just use a kitchen knife and wash it afterwards.

I think about five. Back when I had rabbits I'd say seven, they were viscous box killers.

Two

I have four... somewhere around here. There's usually one nearby when I need it.

One very old and very blunt box cutter, hidden in a junk drawer somewhere. It's enjoying its retirement :)
I've resorted to using a cheap fruit knife if I need to cut any boxes.

I think I have four; two in the basement in my toolbox (one medium-sized, one large), one in the kitchen and also a teeny-tiny one in my pocket that I carry all the time.

Box cutters, none at the moment (though I've had up to 3 at once, 1 normal one and 2 of those folding types with the 1-1.5inch long changeable blades you know the type.)

Knives in general that I can and would use to cut boxes (not counting kitchen knives): 4 multitools, 5 folding/locking knives.