Rats may be small, but they need plenty of space to stay happy and healthy. Many new rat owners assume that since rats are tiny, a small cage will do. However, a cramped environment can lead to stress, boredom, and even health issues.
If you’re wondering how big a cage for two rats should be, this guide will cover:
- The ideal minimum cage size for two rats
- Why vertical space matters
- The best cage features to look for
- Common mistakes to avoid
- A free tool to calculate the perfect cage size
Minimum Cage Size for Two Rats
The general rule is at least 2 cubic feet of space per rat. That means for two rats, you need a minimum of 4 cubic feet. However, bigger is always better. A small cage can cause territorial behavior and limit your rats’ ability to climb, run, and explore.
Recommended Cage Dimensions
| Cage Type | Dimensions (L x W x H) | Cubic Feet | Notes |
|---|---|---|---|
| Minimum Size | 24” x 12” x 24” | 4 cu. ft. | Only suitable for temporary housing |
| Good Size | 30” x 18” x 36” | 9 cu. ft. | Allows climbing and better movement |
| Ideal Size | 36” x 24” x 48” | 12+ cu. ft. | Best for enrichment and socialization |
Want to find the perfect cage size based on the number of rats you have? Use this free tool: Rat Cage Calculator
Why Bigger is Always Better
A larger cage isn’t just about comfort—it directly impacts your rats’ physical and mental health. Here’s why more space is essential:
✅ Reduces Stress & Fights – Rats are social but also territorial. A cramped cage can lead to fights.
✅ Encourages Natural Behavior – In the wild, rats climb, burrow, and explore. A larger cage mimics their instincts.
✅ Prevents Health Issues – More room means more exercise, reducing obesity and respiratory problems.
✅ Easier to Clean – A bigger cage stays fresher longer, cutting down on odors.
Vertical Space is Just as Important
Unlike some other small pets, rats love to climb. A tall, multi-level cage gives them the ability to explore, which is why height is just as important as floor space.
The best cages have:
- Multiple levels and ramps for climbing
- Hammocks and hideouts for resting
- Tunnels, ropes, and ladders for enrichment
Bar Spacing: A Crucial Detail
Even if a cage meets the size requirement, bar spacing is critical. If the bars are too far apart, rats can escape or get stuck.
Bar spacing guide:
- Baby rats: ¼ inch spacing
- Adult rats: ½ inch spacing
Larger gaps can be dangerous, so always check the spacing before buying a cage.
Common Cage Mistakes to Avoid
When choosing a cage, avoid these common pitfalls:
❌ Buying a cage that’s too small – If your cage is under 4 cubic feet, your rats will feel cramped.
❌ Using an aquarium or glass tank – Poor ventilation can lead to respiratory problems.
❌ Choosing wide bar spacing – Anything over ½ inch is an escape risk.
❌ Skipping multi-levels – A single-level cage, even if large, won’t allow enough climbing.
❌ Not adding enough accessories – A bare cage with no toys or tunnels is boring and unhealthy.
Best Cages for Two Rats
Here are some excellent options that provide enough space, ventilation, and climbing opportunities:
| Cage Name | Dimensions | Pros |
|---|---|---|
| Critter Nation (Single Unit) | 36” x 24” x 39” | Spacious, sturdy, easy to clean |
| Prevue Hendryx Feisty Ferret | 31” x 20” x 55” | Affordable, multi-level |
| Midwest Deluxe Ferret Nation | 36” x 25” x 63” | Huge, best for multiple rats |
If you’re unsure whether a cage is big enough, use this tool to check: Rat Cage Calculator
How to Set Up the Perfect Rat Cage
Once you have the right cage, setting it up correctly is just as important. Here’s what to include:
🔹 Bedding: Use paper-based bedding for odor control and comfort. Avoid pine and cedar, which can harm rats’ lungs.
🔹 Hideouts: Provide small boxes or igloos where your rats can retreat and feel safe.
🔹 Toys & Chew Items: Rats love to gnaw, so give them wooden toys, cardboard tubes, or untreated branches.
🔹 Hammocks & Ladders: These make great climbing structures and cozy resting spots.
🔹 Food & Water: Use a sturdy ceramic dish for food and a hanging water bottle for hydration.
Final Thoughts
A good cage is the foundation of your rats’ well-being. Stick to at least 4 cubic feet for two rats, but aim for 9-12 cubic feet or more for a truly enriching space. The bigger and taller, the better!
Need help calculating the perfect cage size? Try this tool: Rat Cage Calculator