Your results will appear here.
Enter your values and press Calculate.
Enter the number of dogs and the run area you want for the first dog in square feet. The calculator adds 50 percent of that area for each extra dog, a rule used by several kennel guides, then gives the total run area, the fencing length for a square run, and a suggested length and width for a 2 to 1 rectangle. Dogs run in straight lines, so a long narrow run beats a square of the same area. These are planning estimates, not professional advice, and a run never replaces walks.
Run area = area for the first dog × (1 + 0.5 × (dogs - 1)). The first dog sets the base area, and each extra dog adds half that area again, because dogs sharing a run need room to pass each other and rest apart, but not a full second run. Fencing for a square run = 4 × sqrt(run area). For a 2 to 1 rectangle, suggested length = sqrt(run area × 2) and suggested width = sqrt(run area / 2).
Worked example: 1 dog at 60 sq ft needs a 60 sq ft run, 31 ft of square fencing, and a rectangle of about 10.95 ft by 5.48 ft. For 2 dogs at the same base the run is 90 sq ft, with 38 ft of fencing and a rectangle of about 13.42 ft by 6.71 ft. Dog run length vs width matters: always favour length, since dogs sprint along the long side. Dog run dimensions are shown in feet; divide feet by 3.281 for dog run size in metres, and the same formula sizes a dog pen size for a fenced yard corner.
Count the dogs that will use the run at the same time, not the dogs in the household. Then pick the area for the first dog from the weight-band table below: small dogs need less, large and giant dogs need far more, and high-energy dogs need more than calm dogs of the same size. Enter the hours the dog spends in the run only as a sanity check on your allowance: a dog left in a run all day needs the generous end of the range, while a dog that only uses the run for toilet breaks can use the minimum end. Press Calculate and check the run area against your yard before you buy panels.
Dog run size for small dogs (under 30 lb) starts around 24 to 36 sq ft for a panel kennel, for example 4 ft by 6 ft, and up to 100 sq ft for a generous exercise run. Medium dogs of 30 to 60 lb suit 36 to 48 sq ft as a kennel minimum, for example 6 ft by 6 ft or 6 ft by 8 ft. Large dogs of 60 to 100 lb, including a Labrador dog run size and a German Shepherd dog run size, need about 60 to 100 sq ft, for example 6 ft by 10 ft or 10 ft by 10 ft. Giant dogs over 100 lb need 100 sq ft or more, for example 10 ft by 10 ft at minimum and 10 ft by 20 ft for all-day use. Always size for the adult dog: a dog run size for puppies should use the adult weight band, or the run will be outgrown in months.
Dog run size for 2 dogs is the first-dog area plus 50 percent, not double: two medium dogs at a 48 sq ft base need 72 sq ft. For three dogs the multiplier is 2.0, for four dogs 2.5, and so on, following the same plus 50 percent per extra dog rule. Dogs that do not get on should never share one run: two side-by-side runs with a divider are safer than one larger shared run. Boarding and breeder setups use the same rule, which is why seller configuration tables jump from 10 ft by 5 ft for one large dog to 12 ft by 5 ft or 12 ft by 6 ft for multiple dogs.
Dog run fence height should be at least 4 ft for small non-climbing dogs and 6 ft for most medium, large and giant breeds. Climbers need 6 ft plus a lean-in top or a solid roof, and jumpers need a roof regardless of fence height. Diggers need a buried wire apron, a concrete base, or paving around the edges. A roof also keeps out birds of prey for small dogs and keeps rain off the run floor. Check local rules before building: some places set legal minimums for kennel runs, and those floors override any guide figure on this page.
An indoor crate and an outdoor dog run are different tools. A crate is a short-term rest and training space sized to the dog lying down, roughly nose-to-tail plus a few inches, while a run is an exercise and toilet space measured in square feet. Dogs should not live in either full time: an outdoor kennel needs insulation, draught protection and shade, and cold-sensitive breeds suffer below freezing even in a kennel. The hybrid setup works best for most owners: indoor sleeping, outdoor run for play and toilet breaks, and walks for real exercise.
The best material for an outdoor dog kennel floor depends on drainage: concrete drains and cleans easily but is hard on joints, gravel drains well but traps waste, and grass is kind on paws but turns to mud. Whatever you choose, the run needs shade, a raised shelter or kennel box, and a water bowl that cannot tip. Clean the run daily and wash it weekly: smell comes from waste left in corners and from poor drainage, not from the run itself. Measure your yard before ordering panels, and leave a path around the run for cleaning access.
Guides disagree because they measure different things: panel kennel minimums (24 to 100 sq ft), exercise yard recommendations (100 to 400 sq ft), and legal floors for commercial kennels (as low as a few square feet per dog plus a run at least 10 ft long). This calculator does not average them into a fake standard. It starts from the area you choose for the first dog, shows the multi-dog scaling openly, and the tables above label which end of the range each figure belongs to, so you can pick a kennel minimum or a generous exercise run with your eyes open.
For a panel kennel, common minimums are 24 sq ft for a small dog, 36 to 48 sq ft for a medium dog, and 60 to 100 sq ft for a large dog. Generous exercise runs are much larger, up to 400 sq ft for a large dog. The minimum you should build depends on whether the run is a kennel or an exercise yard.
A large dog of 60 to 100 lb needs at least 60 sq ft as a kennel, for example 6 ft by 10 ft, and 100 sq ft or more, for example 10 ft by 10 ft, for all-day or working-breed use. A Labrador dog run size and a German Shepherd dog run size both sit in this band.
It depends on size, energy and hours in the run. A calm small dog may be fine in 24 to 36 sq ft, while an active large dog needs 100 sq ft or more. This calculator turns your chosen first-dog area into a total for your dog count.
A run should rarely be narrower than 5 ft, even for small dogs, so the dog can turn and pass comfortably. Kennel guides put run width at 4 to 5 ft for panel systems and 10 ft or more for exercise yards. Length matters more than width: favour a long run over a square one.
Most pet dogs should not live outdoors full time. An outdoor kennel can work for hardy breeds with an insulated, draught-free shelter, shade, water and daily human contact, but puppies, elderly dogs, short-coated breeds and dogs in extreme climates need indoor sleeping.
There is no single safe temperature: coat, age, health and wind chill all matter. Short-coated and small dogs suffer well above freezing, while thick-coated working breeds cope lower. As a rule, if water freezes in the kennel or the dog shivers, the dog belongs indoors.
A roof is strongly recommended: it stops climbers and jumpers escaping, keeps out rain and birds of prey, and gives shade. Open-top runs only suit calm, non-climbing dogs in secure gardens, and even then a partial cover helps.
Galvanised steel panels last longest and resist chewing, while wooden kennels insulate better but need maintenance. Concrete floors clean easiest, gravel drains best, and grass suits paws but needs rest to recover. Pick the combination that fits your climate and your dog's chewing habits.
Use 6 ft fencing for most breeds, a roof or lean-in top for climbers, a buried apron or concrete base for diggers, and secure latches a clever dog cannot nose open. Check the fence line weekly for gaps, loose panels and new digging.
Concrete is easiest to clean and most durable, gravel drains well, and grass is kindest on joints but wears out. Many owners combine a concrete toilet corner with a grass or gravel play area, and add rubber matting in the shelter for comfort.