How to Build Cornhole Boards

This guide covers building a regulation pair of cornhole boards per American Cornhole Association (ACA) specifications. The ACA spec is the standard for competitive play and the reference point for any DIY build: 2×4-foot playing surface, 6-inch hole centered 9 inches from the top edge and centered side-to-side, playing surface elevated 12 inches at the top end and 3–4 inches at the bottom, and a sturdy leg system that folds for storage. Materials for one board run $25–$50; a pair costs $50–$100 before paint.

Two boards are required for a complete set. Build them simultaneously — cut all pieces from the same sheet of plywood to ensure consistent dimensions, and finish both boards under the same conditions so the surface texture and bag-slide feel is identical.

Time: 3–5 hours for a pair. Cost: $50–$100 for both boards before paint. Difficulty: Beginner. Permit: None required.

ACA Regulation Specifications

What You'll Need

Tools

• Circular saw or table saw
• Jigsaw with a clean-cutting blade (for the hole)
• Drill/driver
• 1/4-inch drill bit and 6-inch hole-cutting attachment or 6-inch Forstner bit
• Router with 1/2-inch roundover bit (recommended — smooths the hole edge for clean bag slides)
• Orbital sander, 80 and 120 grit
• Tape measure, framing square, marking pencil
• Clamps
• Paint roller and brushes

Cut List — Per Board

• 1 playing surface panel: 1/2-inch or 3/4-inch Baltic birch plywood, 24×48 inches. Use 3/4-inch for competition play (more rigid, less bounce); 1/2-inch is acceptable for casual play.
• 2 frame side rails: 2×4 construction lumber, 48 inches
• 1 frame top cross rail: 2×4, 21 inches (fits inside the side rails)
• 1 frame bottom cross rail: 2×4, 21 inches
• 2 legs: 2×4, 11.5 inches long (cut at a compound angle — see Step 6)
• 2 leg-pivot bolts: 3/8×3-inch carriage bolts with washers and wing nuts

Step-by-Step Instructions

Step 1 · Cut the plywood playing surface

Cut one 24×48-inch panel per board from a sheet of 3/4-inch Baltic birch plywood. Baltic birch (also called furniture-grade plywood) has more plies, fewer voids, and a smoother face than construction plywood — the bag slides more consistently on a smooth face. If Baltic birch is unavailable, use the smoothest face of standard cabinet-grade plywood and fill any surface defects with wood filler before sanding. Cut with a circular saw and a straightedge clamp guide to ensure all four edges are parallel and square.

Step 2 · Mark and cut the 6-inch hole

Find the center of the hole: 12 inches from each long edge (the center of the 24-inch width), and 9 inches from the top short edge. Mark the center point with a pencil. Drill a 1/4-inch pilot hole at the center point. Use a 6-inch hole-saw attachment in a drill: set the arbor bit in the pilot hole and cut through at moderate speed. Do not rush the cut — a 6-inch hole saw will bind and tear the plywood face if forced. Alternative: drill a 1/4-inch pilot hole, draw the 6-inch circle with a compass (3-inch radius), and cut with a jigsaw staying just outside the line, then sand to the line.

Step 3 · Route or sand the hole edge smooth

The hole edge is critical to bag play — a rough edge catches bags and slows them inconsistently. Use a router with a 1/2-inch roundover bit to round both the top and bottom edges of the hole. If you don't have a router, sand the hole edge progressively: 80 grit, then 120 grit, working the entire circumference evenly. The finished edge should have no splinters, no sharp lips, and a consistent roundover that the bag can slip over cleanly.

Step 4 · Build the frame

Assemble the 2×4 frame on a flat surface: two 48-inch side rails, one 21-inch top cross rail, and one 21-inch bottom cross rail. The cross rails sit inside the side rails (producing a finished outside dimension of 24 inches). Attach each joint with two 3-inch structural screws. Check square by measuring the diagonals — they must match. Apply wood glue at each joint before driving screws for a rigid frame. The top cross rail sits 3.5 inches from the top end of the side rails; the bottom cross rail sits flush with the bottom end.

Step 5 · Attach the playing surface to the frame

Set the plywood panel on top of the frame. The panel should overhang the frame by 0 on the sides and 0 on the ends — the frame's outside dimension exactly matches the panel. Apply a bead of wood glue to the top face of each frame rail. Set the panel down, align edges, and clamp. Secure with 1 5/8-inch screws driven from the top of the panel into each rail, every 6 inches along the side rails and two screws per cross rail. Countersink each screw slightly — any proud screw head will interrupt the bag slide. Fill countersink holes with wood filler before sanding if you want a finished surface.

Step 6 · Cut and attach the folding legs

The legs attach to the bottom cross rail and fold up against the frame face for storage. Each leg is a 2×4 cut to 11.5 inches with a compound angle on the bottom end so the foot sits flat on the ground when the board is at the regulation 12-inch height. The cut angle is approximately 22°. Use a miter saw set to 22°. Drill a 3/8-inch pivot hole through each leg and a matching hole through the bottom side of the frame side rail. Install with a 3/8×3-inch carriage bolt, washer, and wing nut. The wing nut allows the legs to be tightened for use or loosened to fold flat. Test that the board stands at 12 inches at the top end with the legs deployed — measure from the top of the playing surface to the ground, not the bottom of the frame.

Step 7 · Sand the entire playing surface

Sand the playing surface to 120 grit. Any grain raise, plywood edge splinter, or screw countersink will affect bag play and paint adhesion. Pay particular attention to the area around the hole — this is the highest-traffic zone and the most likely to show surface inconsistency. Do not sand above 120 grit before painting; higher grits close the wood pores and reduce paint adhesion. Wipe down with a tack cloth before priming.

Step 8 · Prime the playing surface

Apply one coat of exterior primer to all faces and edges of the board. Primer seals the plywood and prevents the paint from soaking unevenly into the grain. Use a foam roller on the playing surface for a smooth finish — a brush leaves stroke marks. Let dry completely per the primer manufacturer's instructions, typically 1–2 hours. Lightly sand with 220-grit after priming to smooth any grain raise from the water-based primer, then wipe down again.

Step 9 · Paint the design

Apply two coats of exterior latex paint in your chosen color(s). For a two-color design, paint the background color first, let it dry fully (4 hours minimum), then mask with painter's tape for the foreground design. Apply the second color, remove the tape while still slightly wet to get clean edges. For complex designs, print the design at full scale, transfer to the board with transfer paper, and fill in with a brush. The playing surface is a common place for team logos, school colors, or simple geometric patterns. Finish with two coats of spar urethane or exterior polyurethane over the entire surface — this seals the paint and creates the smooth, fast surface that bag play requires.

Step 10 · Seal with gloss finish coat

Apply two coats of spar urethane in gloss or satin finish. Spar urethane (rather than interior polyurethane) withstands UV and moisture. Apply with a foam roller. The first coat may raise the grain slightly — sand with 320-grit between coats. After the second coat, the surface should be smooth, non-tacky, and have a consistent sheen. Let cure 48 hours before play. The sealed surface controls bag slide speed — a rough or uneven surface produces inconsistent play. Both boards in a set must be finished identically for fair play.

Common Mistakes

• Wrong hole placement. The hole center must be exactly 9 inches from the top edge and 12 inches from each side. Measure twice, drill once. A misplaced hole cannot be repaired.
• Rough hole edge. An unrounded hole edge snags bags and causes inconsistent scoring. Route or sand the hole edge carefully before painting.
• No primer before paint. Paint on unprimed plywood soaks into the grain unevenly, causing a rough texture that affects bag play and looks poor after the first season outdoors.
• No finish coat over paint. Paint alone will wear off the high-traffic playing surface within a season. Spar urethane is not optional — it seals the paint and creates the playing surface.
• Legs cut to the wrong angle. A leg cut at the wrong angle will rock or not hold the board at exactly 12 inches. Test the height before final assembly.
• Building the boards on different days with different finish lots. Surface texture differences between boards affect bag play. Finish both boards identically in the same session.

When to Call a Pro

Cornhole boards are a beginner-appropriate project. No professional assistance is needed. If the jigsaw hole cut comes out rough, a router solves it. The only situation where this project fails is skipping the finish coat — bags will stick or bounce inconsistently on uncoated paint.

Maintenance

Store boards horizontally or vertically (legs folded) in a dry location. Sand and re-coat with spar urethane every 2–3 seasons or whenever the surface feels rough or shows wear through the finish coat. Re-paint if paint is peeling — this usually indicates the seal coat has failed and allowed moisture under the paint layer. Repair leg pivot hardware when the wing nut no longer holds the leg firm under play conditions.

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ACA Official Rules — Dimensional Tolerances

American Cornhole Association (ACA) official competition rules specify the following dimensional tolerances for sanctioned tournament play: board face dimensions of 24 × 48 inches, tolerance ±0.25 inch. Hole diameter of 6 inches, tolerance ±0.125 inch. Hole center from the near end of the board: 9 inches, tolerance ±0.125 inch. Hole center from each side edge: 12 inches (centered on the 24-inch width), tolerance ±0.125 inch. Front height (low end): 2.5 to 4 inches. Rear height (high end): 11.5 to 12.5 inches. Playing surface: smooth, no texture, paint or coating only. Bags must be able to slide on the surface — rough or high-grip coatings are not tournament legal.

These tolerances are strict for tournament play. For recreational play, minor dimensional variations are acceptable, but building to the nominal spec ensures the boards play with the regulation trajectory and feel. The 22-degree slope (approximately) created by 12-inch rear height and 3-inch front height is the defining characteristic of cornhole physics — bags slide and skip differently on steeper or shallower slopes.

Plywood Grade Selection

The playing surface is the most visible and most-handled component. Plywood grade determines how much sanding and filling is needed to achieve a smooth playing surface. Options in ascending quality and cost:

• CDX construction plywood (3/4 inch): rough face, voids in inner plies, requires significant filling. Not recommended for the playing surface; adequate only for the leg/frame construction
• AC plywood (3/4 inch): smooth A face, rough C back. The A face is sanded at the mill; fewer surface voids. Adequate for painted playing surfaces with minimal additional sanding
• Baltic birch plywood (3/4 inch): void-free inner plies, sanded faces on both sides, no face voids. The standard for quality cornhole boards. More expensive and may require ordering from a hardwood dealer — not always stocked at general home centers
• Birch veneer plywood (3/4 inch): similar to Baltic birch; widely available at hardwood dealers. A-grade face is smooth and nearly void-free

Whatever plywood grade is used, the playing surface must be sanded to 180 grit minimum before painting. Any voids must be filled with wood filler and sanded flush. A bumpy or rough playing surface affects bag slide and bounce in ways that are immediately noticeable during play.

Leg Construction Detail and Angle Options

The legs create the 12-inch height differential between the high end (hole end) and the low end. Two approaches are standard: fixed-angle leg sets (permanently attached at the correct angle), or folding leg hardware (allows flat storage of the boards for transport).

Fixed-angle legs: cut 2×4 legs to length with both ends mitered at 22 degrees (the leg angle relative to the board underside). The top cut is flush with the underside of the board; the bottom cut is parallel to the ground. A consistent miter angle ensures all four legs contact the ground simultaneously. Use a miter saw set to 22 degrees for clean, consistent cuts. Connect with 3-inch structural screws from above through the board into the leg top, and a gusset plate or corner bracket on the underside for additional rigidity.

Folding leg hardware: available from cornhole-specific hardware suppliers (ACA-approved hardware sets are available online). These typically use aluminum piano hinge sections or steel pivot hardware rated for repeated folding. Follow manufacturer instructions for installation — folding hardware introduces precision requirements that fixed-leg construction does not. The pivot point must be exactly positioned to allow the leg to fold flat without binding.

Leg spacing: the two legs on the low end of each board should be spaced to 50–80% of the board width (12 to 19 inches apart, measured between outer leg faces) for lateral stability. Legs placed too close together allow the board to tip sideways during play. Legs placed too wide can interfere with players' footing position during throws.

Hole Cutting Method and Edge Finishing

Three tools cut a clean 6-inch hole: a circle jig with a router (cleanest result, requires a router and circle jig attachment), a hole saw (6-inch hole saw arbor + drill — available at most hardware stores, provides acceptable results), or a jigsaw (requires a precise circle template and careful cutting — most difficult to control).

Router/circle jig: set the jig radius to 3 inches (producing a 6-inch hole). Rout in multiple passes — plunge 1/4 inch per pass through 3/4-inch stock requires 3–4 passes. Final pass should be a full-depth climb cut (reverse direction) to clean the cut edge. The router method produces the smoothest hole edge of any technique.

Hole saw: use a 6-inch bi-metal or carbide-tipped hole saw. Drill a pilot hole at the center mark first. Drill from the face side through approximately 1/2 inch, then flip the panel and complete the cut from the back. This two-direction approach prevents tearout on the face veneer. Sand the inside of the hole with a drum sander attachment or folded sandpaper at 80, 120, and 180 grit to remove saw marks and smooth the edge for bag contact.

Regardless of cutting method, round over the hole edge with a 1/4-inch roundover router bit or by hand sanding with progressively finer grits. A sharp square edge on the hole catches bags and causes premature wear. The rounded edge also prevents the playing surface paint from chipping at the hole perimeter.

Paint System for Playing Surface Durability

Playing surface paint must survive UV exposure, moisture, and continuous bag friction without flaking. Oil-based or alkyd enamel paints are significantly more durable than latex in this application. The sequence for a tournament-quality paint job:

1. Sand to 180 grit, raise the grain with a damp cloth, sand again to 220 grit when dry
2. Apply oil-based primer (Zinsser Cover Stain or equivalent). Allow 4-hour dry time
3. Sand primer with 220 grit, wipe clean with a tack cloth
4. Apply first coat of enamel (satin or gloss — higher sheen means faster bag slide). Allow overnight dry time
5. Sand with 320 grit for second coat adhesion, wipe clean
6. Apply second coat of enamel. Allow 48-hour cure before playing
7. Optional protective topcoat: one coat of spar urethane (oil-based) extends paint life by 2–3 seasons outdoors. Apply with a foam roller for a smooth, bubble-free surface

Custom design options: apply the enamel base coat first, then stencil team logos or decorative patterns with a brush or spray can, allow to dry, then apply the spar urethane topcoat over the entire surface. The topcoat seals the stencil work and prevents lifting during play.

Bag Specifications for Competition and Practice

ACA bags must weigh 15 to 16 ounces, measure approximately 6 × 6 inches, and be filled with whole corn kernels or resin pellets. Two bag types are standard: all-fabric bags (both sides same fabric, used for practice) and dual-sided bags (one side fast-slide nylon or suede, one side slow-grip canvas). Dual-sided bags allow players to select slide characteristics per throw — a key strategy element in competitive play.

When building boards for practice, companion bags can also be sewn — 6 × 6-inch canvas squares, double-stitched, filled with 14–16 ounces of resin pellets (uniform density, no degradation over time) or corn. Make or buy bags at the same time as the boards to ensure the pairing is practice-ready from the first session.

Storage and Transport

Cornhole boards are awkward to store: each board is 24 × 48 × 13 inches at the high end. Standard storage approaches: standing upright leaning against a garage wall (requires wall hooks or a lean-to bracket to prevent falling), horizontal on garage rafters or shelving (6 square feet of shelf space), or in a custom storage bag (cornhole bag sets are sold separately).

For transport in a standard SUV or pickup, boards fit flat in most cargo areas. Boards with folding legs store flat at 24 × 48 × 2 inches (the stack height of two boards with legs folded). Fixed-leg boards cannot be stacked without risking leg damage — transport with legs up, boards face-to-face with a moving blanket between them.

Common Mistakes and Remedies

• Hole center slightly off from 9/12 standard. Measure and mark twice before drilling. Off-center holes cannot be corrected — fill with a plywood patch and epoxy filler and re-drill (results are visible under paint). Rebuild is faster than a perfect repair.
• Uneven leg heights causing board rock. Test on a flat surface before final fastening. Adjust by trimming the long leg slightly rather than adding shims. A rocking board causes bags to slide unpredictably.
• Paint peeling within a season. Caused by insufficient surface preparation or wrong paint type. Sand to bare wood, re-prime with oil-based primer, repaint with enamel. Latex paint over bare plywood without oil primer will peel.
• Hole edge catching bags. Round over the hole edge fully — 1/4-inch radius minimum. A sharp edge is the most common cause of bag wear and bounce inconsistency.
• Frame twist. Check boards for flatness on a known-flat surface before painting. A twisted board accepts bags differently at different points of the surface. If the board is twisted, add a cross brace to the frame underside to pull it flat before the finish coats.