Estimated First Month's Total
38 lbs / 17 kg
Ongoing Monthly Need: 15 lbs / 7 kg
*First month's total includes the initial amount to fill all boxes plus your ongoing top-up amount.
Clumping Clay
Forms hard clumps when wet, making it easy to scoop out waste. Excellent for odor control and a popular choice for many cat owners. Can be dusty and heavy.
Non-Clumping Clay
Absorbs urine but doesn't form clumps. Generally less expensive but requires more frequent complete litter box changes to control odor.
Silica Gel (Crystals)
Highly absorbent crystals that trap urine and odor. Low dust and lightweight. Requires less frequent changing but can be more expensive, and some cats dislike the texture.
Natural Litters
Made from renewable materials like pine, corn, wheat, or recycled paper. Often biodegradable and lightweight, but odor control can vary. A good eco-friendly option.
The N+1 Rule
The golden rule for multi-cat households is to have one litter box per cat, plus one extra. This helps prevent territorial disputes and ensures there's always a clean box available.
Location is Key
Place litter boxes in quiet, low-traffic areas where your cat feels safe. Avoid putting them near noisy appliances or right next to their food and water bowls.
Perfect Depth
Most cats prefer a litter depth of 2-3 inches (5-7.5 cm). This is deep enough for them to dig and bury their waste comfortably. Too little or too much can deter them from using the box.
Keep it Clean
Scoop the litter box at least once a day. For a deep clean, empty the box completely and wash it with mild soap and water every 1–2 weeks (or more frequently for non-clumping litter).
Automatic Litter Boxes
These devices can reduce daily scooping but don't eliminate litter usage. You'll still need to top up the litter and empty the waste compartment. Our calculator provides a good baseline, but check your device's manual for specific litter type or volume recommendations.
From Sand to Science
Before the 1940s, cat owners used sand, ash, or dirt. The invention of absorbent clay "Kitty Litter" by Ed Lowe revolutionized indoor cat care, making it cleaner and more convenient.
Environmental Impact
Consider the footprint of your choice. Traditional clay litter is strip-mined and not biodegradable, contributing to landfill waste. Natural litters made from renewable resources are a more sustainable option.