Pet Stairs and Ramps: Buying and Building Guide

A ramp slope steeper than about 18–20° (roughly a 1:3 rise-to-run ratio) is too steep for most dogs to descend safely, and for small dogs, older pets, or dogs recovering from surgery, vets generally recommend staying under 12–15°. Stairs, not ramps, are usually the better choice for cats and confident dogs; ramps are usually better for large dogs, dogs with joint issues, and post-surgical recovery.

Choosing between a ramp and steps

The decision comes down to the pet’s joints and confidence, not just the furniture height. A ramp spreads the climb over a shallow, continuous slope, which reduces peak load on hips, knees, and spine — important for dogs with hip dysplasia, arthritis, or a recent orthopedic surgery. Steps concentrate the climb into discrete pushes, which most healthy dogs and cats handle instinctively but which can be harder on a compromised joint or a very short-legged breed.

Worked example: for a bed 24″ high, a ramp built to a comfortable 15° slope needs a run of about 90″ (24 ÷ tan 15° ≈ 89.6″), which is often too long for a bedroom. Steps to the same 24″ height, built with a comfortable 4–45° step angle for pets and roughly 4″ risers, need only 3–4 steps and about 24–30″ of floor footprint — far more practical in tight spaces. Run your own furniture height and available floor space through the Pet Stair/Ramp Calculator to see which option actually fits your room.

Stairs vs. ramp: how they compare

Factor	Pet stairs	Pet ramp
Typical cost (buy)	$30–$120	$60–$200
Typical footprint	Compact, 24–36 in run	Long, 60–96+ in run at a safe slope
Best for	Healthy dogs, cats, confident climbers	Joint issues, post-surgery, large/heavy dogs, seniors
Build difficulty (DIY)	Low — basic box stringers	Moderate — needs non-slip surface and rigid support
Storage when not in use	Easier, smaller and often stackable	Harder, longer and less compact

Common mistakes

1. Building or buying a ramp too steep for the intended dog. A ramp folded to fit a small room is often steeper than 20°, which defeats the point of choosing a ramp over stairs in the first place — measure the achievable slope before committing to the design.

2. Skipping a non-slip surface on wood or laminate steps. Bare wood or painted MDF gets slick fast, especially with pet nails; carpet treads, rubber matting, or a textured non-skid coating are not optional extras on pet stairs.

3. Sizing steps for the owner’s stride instead of the pet’s leg length. Riser heights comfortable for a Labrador are often too tall for a dachshund or a cat; 4–6″ risers work for most small-to-medium pets, while larger, more athletic dogs can manage 6–8″.

4. Ignoring the top landing. A ramp or stair that dumps the pet directly onto the edge of a bed or couch without a stable landing surface invites a fall right at the top — the last few inches of run need to be flat and wide enough for the pet to fully step off before turning around.

Related calculators you might need

If you’re leaning toward a ramp, the ADA Ramp Slope Calculator is a useful reference point for safe, gentle slopes even though it’s built around human accessibility standards — a ramp built to that gradient will almost always be comfortable for a pet, too. For steps, the Stair Angle/Pitch Calculator and Tread Depth Calculator help you dial in a climb angle and tread size that suits your pet’s size, and the Wood Stair Calculator covers the lumber list if you’re building rather than buying.

Frequently asked questions

What is the best angle for a dog ramp? Aim for 15° or shallower for small, senior, or recovering dogs, and no steeper than about 20° for healthy, larger dogs. Beyond that, most dogs hesitate or refuse to use the ramp at all.

Are pet stairs or a ramp better for a dog with hip dysplasia? A ramp is almost always the better choice, since it avoids the repeated joint-loading push-off that stairs require. Keep the slope as shallow as the available space allows, and add a non-slip surface — a slick ramp can be worse than no assistance at all for a dog with unstable hips.

How tall should pet stairs be per step? For most small-to-medium dogs and cats, 4–6 inches per riser is comfortable; larger, more athletic breeds can manage 6–8 inches. When in doubt, measure the height of a surface the pet already jumps onto comfortably and use that as your riser height.

Can I build my own pet ramp instead of buying one? Yes — a plywood ramp with a carpeted or rubber-matted surface and solid framing underneath is straightforward to build and often cheaper than a comparable commercial ramp. Use the Pet Stair/Ramp Calculator to check your slope before cutting material.