In short
- A horse barn size calculator turns your stall count, stall size, aisle width and extra rooms into a barn length, width and total square feet.
- Penn State Extension calls a 12 × 12 ft stall the standard for a 1,000 lb horse. eXtension says at least 10 ft for an aisle between two rows of stalls.
- Extension has no fixed size for tack or wash rooms, so you enter those. It says a feed room is seldom larger than a box stall.
- Then enter your builder's price per sq ft for a rough cost, and take it to the horse barn cost calculator.
On this page
This horse barn size calculator answers the first plan question for an Ocala barn: how long and wide does it have to be? Pick the stall size, the layout and the aisle from extension figures, add the rooms you want, and see the footprint. It is a planning estimate, not a design or a quote.
En español: Calculadora de tamaño de establo para caballos
| Your numbers | Sq ft |
|---|
What this leaves out
- Overhangs, porches, equipment bays and an arena or run-in sheds.
- Interior walls, doors and partitions beyond the wall thickness you enter.
- Site work, slab, septic, utilities, permits and engineering.
- Local setbacks, fire separation and code rules for your parcel.
A planning estimate, not a quote. Independent local builders can give a written quote through the form on this page.
Next step: take this footprint to the horse barn cost calculator and enter the total square feet to compare a planning range with your builder's price.
How the math works
- Barn width.
Center aisle: stall depth + aisle + stall depth. Shedrow: stall depth + walkway. Six stalls, 12 ft deep, with a 12 ft aisle: 12 + 12 + 12 = 36 ft.
- Barn length.
Center aisle: stalls in the longer row x stall width. Shedrow: all stalls x stall width. Three stalls a row at 12 ft wide is 36 ft.
- Extra rooms.
Your square feet added together, divided by the barn width, give extra length at one end. A 144 sq ft tack room on a 36 ft wide barn adds 4 ft.
- Walls and total.
Wall thickness is added on all four sides, length is rounded up to the next whole foot, and width x length is the total. Price x total is the rough cost.
Sourced sizes behind the menus
These are the only typical sizes the calculator offers. Everything else you enter yourself.
| Item | Figure | Source |
|---|---|---|
| Stall, 1,000 lb horse | 12 × 12 ft | Penn State Extension |
| Stall, riding horse minimum | 10 × 10 ft | eXtension |
| Stall, larger | 16 × 16 ft or more | eXtension |
| Stall, foaling mare | 16 × 20 ft or more | eXtension |
| Aisle between two rows | 10 ft minimum | eXtension |
| Center-aisle example | 36 ft wide | Penn State Extension |
Example footprints
Plain arithmetic from the formula with 12 × 12 ft stalls and a 10 ft aisle, inside dimensions, no extra rooms.
| Layout | Size | Sq ft |
|---|---|---|
| 4 stalls, shedrow | 48 × 22 ft | 1,056 |
| 4 stalls, center aisle | 24 × 34 ft | 816 |
| 6 stalls, center aisle | 36 × 34 ft | 1,224 |
| 8 stalls, center aisle | 48 × 34 ft | 1,632 |
A longer shedrow, a squarer center aisle. A center aisle packs stalls into two rows, so it is shorter for the same count. A shedrow puts every stall in one row, so it runs longer and narrower. Our stall size and barn layout guide covers doors, utilities and expansion.
What the estimate leaves out
- Rooms are rectangles at one end. Real plans put the tack room by the entrance and the wash rack by an exterior door. The total square feet stays about the same.
- Stall size depends on the horse. Larger horses, stallions and horses kept in more hours need more room. Ask a trainer or veterinarian.
- Ceiling and roof. Penn State says ceilings commonly run 10 to 12 ft, with 8 ft as a minimum. Height does not change the footprint but does change cost and airflow.
Questions to ask a builder
- What stall and aisle dimensions have you built for horses like mine?
- Is your price per square foot for inside or outside dimensions?
- Does the price include the slab, stall fronts, electrical and water?
- Can the layout be extended later without tearing out what you build?
- Who pulls the permits, and what does Marion County require for my barn?
When you have a footprint, use the form on this page to ask independent Ocala-area builders for a written quote, and read how to choose a horse barn builder first. For hay, see the pasture acreage calculator and the hay calculator for horses.
Sources
- Horse Stall Design, Penn State Extension: 12 × 12 ft for a 1,000 lb horse, walls under 10 ft not recommended, ceilings 10 to 12 ft with 8 ft minimum.
- Equine Facilities: Stall Dimensions, eXtension: 10 × 10 ft minimum, most 12 × 12, 16 × 16 or larger not uncommon, 16 × 20 ft or larger for foaling mares.
- Equine Facilities: Barn Alleyways and Access Doors, eXtension: at least 10 ft between two rows of stalls, at least 6 ft facing the back of a single row.
- Equine Facilities: Barn Feed Room, eXtension: feed room seldom larger than a box stall, door at least 4 ft wide.
- Equine Facilities: Barn Tack Room, eXtension: no fixed size; large enough for the equipment and horses.
- Horse Stable Ventilation, Penn State Extension: 36-ft-wide center-aisle stable with 12 ft stalls as its example.
- Equine Facilities: Farm Design and Layout, eXtension: wall thickness reduces usable space; check inside measurements.
Frequently asked questions
How big should a horse barn be for 6 stalls?
With 12 by 12 foot stalls, which Penn State Extension calls the standard for a 1,000 pound horse, and a 12 foot center aisle, six stalls need a barn about 36 by 36 feet, or 1,296 square feet, before any tack, feed, wash or hay rooms. A 10 foot aisle, the eXtension minimum between two rows, makes it 36 by 34 feet. The calculator adds your rooms and walls.
How wide should a horse barn aisle be?
eXtension says to always provide at least 10 feet for the alley between two rows of stalls, so horses and a small truck or tractor can pass. Penn State's ventilation guide uses a 36 foot wide center-aisle stable as its example, which fits two 12 foot stalls and a 12 foot aisle. If you will drive a bigger machine through, ask your builder for the width it needs.
How big should a tack room or feed room be?
Extension gives no fixed size for a tack room: it should be large enough for your equipment and the horses in the barn. For a feed room, eXtension says it is seldom larger than a box stall and that its door should be at least 4 feet wide. Enter your own square feet for each in the calculator.
Are the barn dimensions inside or outside?
By default the calculator uses inside dimensions. Penn State Extension warns that wall thickness uses up space, so a building that is 30 feet wide outside will not hold two rows of 10 foot stalls and a 10 foot alley. Enter your wall thickness to add it around the outside, and ask your builder whether a price per square foot uses inside or outside measurements.