Alright, let’s talk about something seemingly simple but kinda crucial if you have a cat: the litter box situation. Specifically, how much litter you’re actually supposed to put in there. I remember when I first got Mittens, my fluffy overlord, I honestly didn’t have a clue.

My First Attempts (and Mistakes)
So, first time setting up the box, I grabbed the bag of litter and just… poured. I figured more must be better, right? Keep things deep, give her plenty to work with. Well, that turned out messy. Mittens would go in there and kick litter like she was trying to dig to China. Seriously, I found litter granules halfway across the living room. And scooping felt like an archaeological dig, wading through mountains of clean litter to find the clumps. Plus, it used up a ton of litter way too fast.
Okay, lesson learned. Next time, I went the opposite way. I put in just a thin layer, barely covering the bottom of the pan. Seemed economical. Wrong again. This was maybe even worse. When Mittens did her business, the clumps basically cemented themselves to the bottom of the box. Trying to scrape those off was a nightmare, often breaking the clumps apart. And honestly, it didn’t seem like enough for her to properly bury anything. You could tell she wasn’t thrilled, and the odor control? Non-existent.
Finding the Right Balance
Clearly, there had to be a sweet spot. I started paying more attention. I realised the goal was to have enough depth for a few things:
- For the cat to dig comfortably: They have that instinct to dig and cover. Not enough litter makes that frustrating for them.
- To form solid clumps: If you’re using clumping litter, it needs enough surrounding dry litter to absorb moisture fully and form a nice, solid clump that doesn’t break apart when you scoop.
- To prevent waste sticking: Enough depth means the urine clumps before it reaches the bottom of the pan.
So, I started experimenting properly. I got a new box and decided to measure this time, kinda. I aimed for what looked like a couple of inches deep across the whole bottom. I watched how Mittens used it. Did she seem happy digging? Were the clumps easy to scoop? Did they reach the bottom?
After a bit of trial and error, adding a little more here and there, I landed on what works for us. For my standard-sized litter box and the clumping litter I use, about 2 to 3 inches seems perfect.
I check it when I scoop daily. If I notice the clumps are looking a bit shallow, or if the scoop scrapes the bottom too easily, I know it’s time to top it up back to that 2-3 inch level. I don’t dump the whole box completely very often, maybe once a month or so for a deep clean, but I maintain that depth consistently.
So, How Much? My Experience Says…
Look, every cat and box might be slightly different. Some cats dig way more than others. Bigger boxes might need a bit more depth just to look right. But based on my own fiddling around and trying to figure it out, here’s my simple take:
Start with about 2-3 inches (that’s roughly 5-7 cm for folks who think that way). See how it goes. Watch your cat. Check the clumps when you scoop. If they’re hitting the bottom or breaking apart easily, add another inch. You probably don’t need more than 4 inches max unless you have a really deep box or a super enthusiastic digger.

It’s not rocket science, but getting it right made life easier for me (less mess, easier scooping) and definitely seemed to make Mittens happier with her bathroom setup. Just took a bit of messing about to get there!