How Much Material for a 12x12 Bedroom? (2026 Full List)
How much material for a 12x12 bedroom? A full finish takes ~2 gal wall paint, 1 gal ceiling paint, ~17-18 sq yd carpet, ~50 ft baseboard, plus drywall if the ceiling is redone.
Wall paint: about 2 gallons
A 12×12 room has 48 ft of perimeter and 8-ft walls: 48 × 8 = 384 sq ft of gross wall. Subtract an interior door (≈21 sq ft) and a window (≈12 sq ft): 384 − 21 − 12 = 351 sq ft of paintable wall.
Two coats: 351 × 2 = 702 sq ft; at ~350 sq ft per gallon, 702 ÷ 350 ≈ 2.0 gallons. Cans only come whole, so buy 2–3 gallons — two finish the walls, the third covers touch-ups. See the 12×12 room paint guide, or use the paint calculator.
Ceiling paint: 1 gallon
The ceiling is 12 × 12 = 144 sq ft. A gallon of ceiling paint covers about 350–400 sq ft, so 1 gallon is enough — even two coats fit (144 × 2 = 288 sq ft).
Fresh white over white takes one coat; dark colors or bare patches take two — still inside one gallon. Keep ceiling white in its own can, separate from the wall color; the paint calculator counts the two surfaces separately.
Carpet: about 17–18 sq yd
The floor is 144 sq ft; add 10% waste for seams and fitting cuts → 144 × 1.1 ≈ 158–160 sq ft. Carpet sells by the square yard: 160 ÷ 9 ≈ 17.8 sq yd, so order about 18 sq yd.
A 12-ft-wide roll usually fits this room in one piece with no middle seam; odd doorways push waste up. See the carpet guide for a 12×12 room for roll widths and seams, or use the carpet calculator.
Baseboard and trim: about 50 linear feet
Baseboard runs the perimeter minus door openings: 48 ft − a 3 ft door leaves 45 ft; add 10% for miter cuts → about 50 linear ft. In 8-ft pieces, 50 ÷ 8 = 6.25 → buy 7 (five 12-ft sticks also work).
No baseboard calculator exists yet, so use this algorithm: add the length of each wall run getting trim, subtract every door's width, add 10% for cuts, and round up to whole pieces. Window and closet trim is extra — measure and add it the same way.
Drywall, if you're redoing the ceiling
Order drywall only when resurfacing ceiling or walls. A 4×8 sheet is 32 sq ft, so the ceiling is 144 ÷ 32 = 4.5 → about 5 sheets.
Walls are separate: 351 sq ft of net wall is 351 ÷ 32 ≈ 11 sheets, but door, window and outlet cutouts chew sheet edges, so plan on about 12. Ceiling plus walls runs roughly 17 sheets.
The full 12×12 bedroom materials list
| Material | Amount for a 12×12 | Suggested buy | Use this tool |
|---|---|---|---|
| Wall paint (2 coats) | 351 sq ft → ≈2 gal | 2–3 gallons | Paint Calculator |
| Ceiling paint | 144 sq ft → 1 gal | 1 gallon | Paint Calculator |
| Carpet | 158–160 sq ft (17–18 sq yd) | ≈18 sq yd | Carpet Calculator |
| Baseboard and trim | ≈50 linear ft | 7 × 8-ft pieces | Method above |
| Drywall ceiling (if redoing) | 144 sq ft | 5 × 4×8 sheets | Divide by 32 sq ft |
| Drywall walls (if redoing) | 351 sq ft net | ≈12 × 4×8 sheets | Divide by 32 sq ft |
Swapped carpet for tile or plank? Use the tile calculator, or read how many boxes of flooring when planks sell by the case. Add primer, caulk, nails and tape as one small consumables line.
Order of work and one-trip buying tips
- Decide the order before you buy — ceiling → walls → floor → baseboard. Paint first so drips miss new carpet; baseboard last covers the floor edge.
- Buy everything in one batch, same lot — wall paint from one batch, carpet from one dye lot; color shifts between batches, and a second trip risks mismatched cans or rolls.
- Price the list, not the room — multiply each line by your local per-gallon, per-sq-yd and per-linear-ft prices and sum them.
FAQ
How much do the materials for a full 12x12 bedroom cost?
No single price — it varies by region, brand and finish. Add local prices for 2–3 gal wall paint, 1 gal ceiling paint, ~18 sq yd carpet, ~50 ft baseboard, plus drywall only if you redo the ceiling. Hired labor often rivals the material total.
What should I do first — paint the walls or install the floor?
Work top-down: ceiling → walls → floor → baseboard. Paint before the new floor goes in so drips land on subfloor; baseboard last covers the floor edge and painted wall bottom.
Can I install and paint all of this myself?
Mostly, yes. Painting is easiest; drywall and baseboard are moderate DIY. Drywall taping and mudding is the hard part — flat joints take practice, so consider hiring a taper. Carpet seams need a power stretcher, usually rented or left to an installer.
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