If you share your home with multiple cats or own a large breed like a Maine Coon, you know the daily chore of scooping a standard litter box can feel endless. Extra large smart litter boxes are designed to solve this problem, offering generous space, automatic cleaning, and app-based monitoring. In this guide, we have evaluated the top models for 2026, focusing on size, safety, odor control, and ease of use. For those with heavier felines, we also recommend reading our review of the best smart litter boxes for heavy cats.

Buying Guide: What to Look for in an Extra Large Smart Litter Box

Size and Interior Capacity

The most important factor is whether the litter box can comfortably accommodate your cat. Extra large models typically offer drum capacities of 75 liters or more, with waste bins that can hold up to 15 liters. This reduces the frequency of emptying, which is especially useful in multi-cat households. For more advice on sizing for multiple felines, see our guide on best smart litter boxes for large Multi-Cat households.

Safety Sensors and Anti-Pinch Design

Safety is non-negotiable when the box runs automatically. Look for infrared sensors, weight detection, and anti-pinch mechanisms that pause the cycle if your cat approaches. These features protect curious kittens and nervous seniors alike. For cats with specific health needs, we have a dedicated article on best smart litter boxes for cats with different health needs.

Odor Control System

An effective odor control system is essential for keeping your home fresh. Many extra large boxes use sealed waste compartments, activated carbon filters, or deodorizing gels to trap smells. Some models also include a self-sealing waste drawer that locks in odors until you empty it.

Smart App and Monitoring Features

App connectivity allows you to schedule cleanings, receive notifications, and track your cat’s bathroom habits remotely. This is particularly valuable for monitoring health changes. For Maine Coon owners, we have reviewed compatible options in our article on top smart litter boxes for maine coon cats.

Final Thoughts

After reviewing the top contenders, we believe the HHOLOVE Self Cleaning Litter Box offers the best balance of open-top comfort and smart features for most households, while the Meowant 75L Extra Large Automatic Litter Box Self stands out for its massive capacity and ultra-quiet operation, making it ideal for multiple cats or larger breeds. Whichever you choose, these extra large smart litter boxes will transform your daily routine.

Frequently Asked Questions

How big is an extra large smart litter box?

Most extra large models have an interior drum capacity between 75 and 95 liters, with waste bins ranging from 9 to 15 liters. This is sufficient for cats up to 22 pounds or more, and for multiple cats.

Are extra large litter boxes safe for kittens?

Many extra large smart litter boxes include safety sensors that stop the cleaning cycle if a small cat or kitten enters. However, some manufacturers recommend waiting until kittens are at least six months old to ensure they are comfortable with the automatic motion.

Do smart litter boxes work for multiple cats?

Yes, extra large models are specifically designed for multi-cat homes. They have larger waste bins and can handle more frequent use. For more information, visit our self-cleaning litter boxes category.

How often do you need to empty the waste bin?

Depending on the model and the number of cats, you may need to empty the waste bin every 5 to 15 days. Larger bins (15 liters) can go longer between changes, making them ideal for busy households or short trips.