Rabbit Cage Size Calculator (check your enclosure against the RWAF 3 × 2 × 1 m minimum)

Understanding the rabbit enclosure size calculator — concept and principle

This calculator checks a rabbit enclosure against the Rabbit Welfare Association & Fund (RWAF) minimum of 3 m × 2 m floor and 1 m height for two rabbits, and shows how much more length, width or height is needed. Rabbit owners use it before buying or building a hutch and run.

How it is calculated

• The longer side is compared with 3 m, the shorter side with 2 m and the height with 1 m.
• Floor area = length × width; share of the 6 m² minimum = area ÷ 6.
• Extra length = max(0, 3 − longer side); extra width = max(0, 2 − shorter side); extra height = max(0, 1 − height).
• A single rabbit needs the same minimum as a pair; more rabbits need more space.

The principle

Rabbits are active animals that need to hop, run, stretch out and stand up on their back legs. RWAF's guidance, summed up as "A hutch is not enough", sets a minimum accessible footprint of 3 m × 2 m and a height of 1 m for two average-sized rabbits, available at all times, with a sheltered sleeping area within that space. Three hops in a row need a long side; standing upright needs height. Because the figure is a minimum, larger spaces and more enrichment are better.

Worked example

Default inputs: enclosure 2.5 × 1.5 × 1 m, 2 rabbits.

1. Longer side 2.5 m < 3 m; shorter side 1.5 m < 2 m; height 1 m = 1 m.
2. Result: below the RWAF minimum.
3. Floor area = 2.5 × 1.5 = 3.75 m², which is 63% of 6 m².
4. Extra needed: length 0.5 m, width 0.5 m, height 0.
5. Note: minimum is set for a pair.

How to read the result

If the enclosure falls short, attach a run or give permanent access to a larger area; a hutch on its own is not enough. Include hiding places, a litter area, hay and toys, and make sure the area is safe from predators and weather.

Common mistakes

• Counting only the hutch and not the attached run.
• Giving a single rabbit less space than a pair.
• Measuring outside dimensions instead of the usable inside space.
• Providing a large run only for a few hours a day.

Frequently asked questions

How big should a rabbit enclosure be?

RWAF recommends at least 3 m × 2 m and 1 m high for two rabbits, available all the time.

Is a hutch enough?

No. A hutch alone does not provide enough space; it should be attached to a large run.

Does a single rabbit need less space?

No. RWAF gives the same minimum for one rabbit.

Sources: Rabbit Welfare Association & Fund (RWAF), "Space recommendations" (A Hutch is Not Enough)