Rat Cage Calculator

Calculate if your cage is big enough for your pet rats. Enter the number of rats and cage dimensions to see if it meets requirements.

Rats should be kept in pairs or groups

Interior length of cage

Interior width of cage

Total interior height

Minimum: 2 cubic feet per rat; Recommended: 2.5-3 cubic feet per rat; Total Volume = (Length × Width × Height) ÷ 1728 (convert to cubic feet); Space Per Rat = Total Volume ÷ Number of Rats; Rats must be kept in pairs or groups!
Example: 2 rats in 30" × 18" × 30" cage; Volume = 16,200 cu in = 9.4 cu ft; Space per rat = 4.7 cu ft (exceeds recommendation!); Floor space = 3.75 sq ft per level; Meets minimum ✓, Meets recommended ✓

How much space does a pet rat need?

Rats are active, social animals that need spacious enclosures. Minimum requirements per rat: 2 cubic feet per rat is absolute minimum, 2.5-3 cubic feet per rat is recommended, More is always better. For 2 rats (minimum you should keep): Minimum 4 cubic feet (e.g., 24" × 18" × 24" tall), Recommended 6+ cubic feet (e.g., 30" × 18" × 30" tall). Rats must be kept in same-sex pairs or groups - they are highly social and suffer alone. Each additional rat needs 2-3 more cubic feet. Height is important - rats love to climb!

What is the best type of cage for pet rats?

Best cage types for rats: 1) Wire cages with solid platforms: Best ventilation, climbing opportunities, multiple levels. Look for 1/2" or 5/8" bar spacing (wider = escape risk). 2) Glass aquariums (55+ gallons): Good for babies or respiratory-sensitive rats, poor ventilation, heavy, no climbing. 3) DIY C&C cages: Customizable, affordable, great for multiple rats. Avoid: Small plastic habitats (too small, poor ventilation), single-level cages (rats need vertical space), cages with wide bar spacing (over 3/4" = escape risk).

How many levels should a rat cage have?

Rats thrive with multiple levels: Minimum: 2-3 levels, Ideal: 3-4 levels, Maximum: limited by ceiling height and cleaning access. Each level should have: Minimum 18-24 inches height clearance, Solid flooring (not wire - causes bumblefoot), Ramps with grip (fabric, fleece, or textured), Hammocks or hidey-houses on each level. Space levels to allow natural behaviors: climbing, exploring, playing, sleeping. Clean all levels weekly. Total cage height of 30-36 inches with 3-4 levels is ideal for 2-4 rats.

What should I put inside a rat cage?

Essential cage items: Bedding: Paper-based or aspen shavings (avoid cedar/pine - toxic), 2-3 inches deep; Hidey-houses: At least one per rat plus one extra for sleeping; Hammocks: Fleece hammocks for lounging (rats love these!); Food dish: Heavy ceramic to prevent tipping; Water bottle: Glass preferred, 8-12 oz, check daily; Toys: Tunnels, chew toys, puzzle feeders, swings; Litter box: Corner litter tray (rats can be litter trained!); Exercise wheel: Not recommended (can cause tail injuries in rats); Nesting material: Shredded paper or tissue. Rotate toys weekly to prevent boredom. Rats are intelligent and need mental stimulation!