How Much Material for a 24×24 Garage? (2026 Full List)

Wall paint: about 5 gallons for two coats

Start with the perimeter: a 24×24 ft garage has (24 + 24) × 2 = 96 ft of wall line, and at a standard 9 ft wall height that's 96 × 9 = 864 sq ft of gross wall area.

Now deduct the openings: the two doors take about 112 sq ft (two 8×7 ft doors) and the windows about 20 sq ft, leaving 864 − 112 − 20 = 732 sq ft of paintable wall. Measure openings trim-to-trim so the number matches the way the paint calculator counts.

Two coats on the net wall mean 732 × 2 = 1,464 sq ft of coverage. At the typical 350 sq ft per gallon: 1,464 ÷ 350 ≈ 4.2 gal, so order 5 gallons (one 5-gal bucket).

Primer covers the net wall once: 732 ÷ 350 ≈ 2.1 gal, so buy 2–3 gallons of primer.

Epoxy floor: about 3 kits for two coats

The slab is 24 × 24 = 576 sq ft. A typical garage epoxy kit covers about 500 sq ft when rolled in two coats, so the floor needs 576 × 2 = 1,152 sq ft of coverage ÷ 500 ≈ 2.3 kits — buy 3 kits.

Coverage varies by brand and concrete texture. Add the usual ~10% buffer for corners, control joints and touch-ups, and 3–4 kits is the safe order. Enter your kit's true coverage in the epoxy garage calculator.

Ceiling drywall: about 20 sheets (43–44 with the walls)

The ceiling mirrors the floor at 576 sq ft. Each 4×8 ft sheet covers 32 sq ft: 576 ÷ 32 = 18 sheets, and ~10% for cuts around beams and edges brings the order to about 20 sheets.

Finishing the walls too? Reuse the net wall number from the paint section: 732 sq ft ÷ 32 ≈ 23 sheets for the walls. Ceiling plus walls: 20 + 23 = about 43–44 sheets total. Order ceiling and wall sheets together for one delivery, or price walls separately in the drywall calculator first.

Complete material list for a 24×24 garage

Counts above deduct openings once, then add a small waste buffer to the order.

Tips that save a second trip

• Patch and prep before you coat anything — fill nail pops and cracks, prime bare drywall, and fill floor cracks before epoxy; coatings seal what's underneath but never hide it.
• Deduct openings trim-to-trim, once each — two doors at 112 sq ft and windows at 20 sq ft pull the 864 sq ft of gross wall down to 732 sq ft of net wall, for both paint and wall drywall.
• Buy a big job in batches — drywall rides flat on a trailer and paint comes in fives; schedule for dry days, store sheets flat off the concrete, and hold back a gallon of paint for touch-ups. A ~10% buffer is cheaper than a second delivery.

Building the same garage one size down? Compare our 20×20 garage material list or jump straight to the sheet count in drywall sheets for a 20×20 garage.

Calculate your exact paint amount →