Rabbit Cage Size Calculator

Who is this for?

• New rabbit owners buying their first hutch and wanting to make sure it is big enough.
• Experienced owners upgrading to a larger or custom-built cage.
• Breeders and shelters who need to house multiple rabbits at appropriate sizes.
• DIY builders planning a custom rabbit hutch and needing precise dimension guidelines.

1. First-time owner buying a store hutch

A new owner brings home a Holland Lop. The pet store offers a "medium" hutch labeled 100 cm × 50 cm × 45 cm. The owner measures the rabbit: hop is 40 cm, stretched width is 55 cm, standing height is 50 cm.

The calculator shows the minimum cage should be $40 \times 3 = 120\ \text{cm}$ long, $55\ \text{cm}$ wide, and $50 \times 1.5 = 75\ \text{cm}$ tall. The store hutch is too short (100 cm vs 120 cm) and way too low (45 cm vs 75 cm). The owner decides to look for a bigger option or build a custom one instead.

2. Building a custom outdoor hutch for two rabbits

An owner has two bonded rabbits — a large breed (hop 65 cm, width 95 cm, height 70 cm) and a small breed (hop 40 cm, width 55 cm, height 45 cm). For two rabbits housed together, the larger rabbit's dimensions determine the minimum.

The calculator indicates: $L = 65 \times 3 = 195\ \text{cm}$, $W = 95\ \text{cm}$, $H = 70 \times 1.5 = 105\ \text{cm}$, $A = 95 \times 65 \times 3 \approx 1.85\ \text{m}^2$. The owner builds a hutch slightly larger at 210 cm × 100 cm × 110 cm to give them extra room to play.

3. Checking if a second-hand cage is suitable

A rabbit rescue receives a donated cage that measures 130 cm × 55 cm × 50 cm. They have a medium rabbit whose hop is 48 cm, width is 60 cm, and standing height is 52 cm. Instead of guessing, they use the calculator in reverse mode — type the cage length (130 cm) into the Length field, and it computes the maximum hop distance: $130 \div 3 \approx 43.3\ \text{cm}$. Since the rabbit's hop is 48 cm, the cage is a bit too short. The rescue labels it for a smaller rabbit.

Measuring your rabbit correctly

• Hop distance: Let your rabbit hop normally on a flat surface and mark where it starts and lands. Measure between the marks. Three to five hops averaged gives the most accurate result.
• Stretched width: Gently encourage your rabbit to lie flat on its side (this happens naturally when they relax). Measure from nose tip to tail base.
• Standing height: When your rabbit stands on its hind legs (often when begging for treats), measure from the floor to the tips of the ears.

Important reminders

• The calculator provides minimum dimensions, not recommended ones. Bigger is always better. If you can go 1.5–2× larger, your rabbit will be noticeably happier.
• Rabbits also need daily exercise time outside the cage — at least 4 hours per day in a space of $2.2\text{--}3\ \text{m}^2$ (24–32 ft²).
• Always include a hide box, food and water bowls, a litter tray (away from food), and toys for mental stimulation inside the cage.
• Switch between metric and imperial units freely — the calculator preserves all values accurately when you toggle units.

Why cage size matters for rabbit health

Rabbits are natural athletes. In the wild, they sprint, dig, and jump for hours every day. A cage that is too small restricts this natural behavior, leading to a cascade of health problems:

• Obesity — rabbits that cannot hop and run become overweight, which strains their heart and joints.
• Spine problems — being unable to stretch out fully can cause muscle stiffness and spinal misalignment.
• Behavioral issues — boredom and frustration from a cramped space can lead to cage biting, aggression, and depression.
• Sore hocks (pododermatitis) — sitting in a small, damp space for long periods can cause painful foot sores.

Cage accessories and setup

Minimum dimensions are just the start. Within that space, you need to fit several essential items without crowding the rabbit:

• Hide box / sleeping area — rabbits are prey animals and need a dark, enclosed space to feel safe.
• Litter tray — place it away from the food and water area (rabbits prefer to keep their eating and toilet spaces separate).
• Food bowl, water bottle / bowl, and hay rack — each takes up floor or wall space.
• Toys and enrichment — tunnels, chew sticks, cardboard castles, and digging boxes keep rabbits mentally stimulated.

A good rule of thumb: after placing all accessories, your rabbit should still be able to hop across the cage in three jumps. If it cannot, the cage is too small or too cluttered.