How much flooring do I need for a 12×12 room?
A 12 × 12 ft room is 144 square feet. With 10 percent for cuts you need 158 square feet of flooring, which is 8 boxes at 20 square feet per box or 7 boxes at 24. Add 2 rolls of 100 square foot underlayment if the flooring does not have a pad attached.
Boxes of flooring for a 12×12 room
| Sq ft per box | Boxes to buy (10% waste) | Sq ft in those boxes | Leftover |
|---|---|---|---|
| 18 sq ft | 9 | 162 | 18 sq ft |
| 20 sq ft | 8 | 160 | 16 sq ft |
| 24 sq ft | 7 | 168 | 24 sq ft |
| 30 sq ft | 6 | 180 | 36 sq ft |
The room is 144 square feet; with 10 percent waste you need 158 square feet of flooring. Box coverage is printed on the carton and ranges from about 17 to 30 square feet for plank products.
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What flooring for a 12×12 room costs
| Flooring | Material per sq ft | For 158 sq ft | Installed, typical |
|---|---|---|---|
| Laminate | $1.50 to $4 | $238 to $634 | $576 to $1,152 |
| Luxury vinyl plank | $2.50 to $6 | $396 to $950 | $720 to $1,440 |
| Engineered hardwood | $4 to $9 | $634 to $1,426 | $1,152 to $2,016 |
| Solid hardwood | $5 to $12 | $792 to $1,901 | $1,440 to $2,592 |
| Tile | $2 to $8 | see the tile calculator | $1,440 to $2,880 |
Underlayment adds about 30 to 60 cents per square foot, and transition strips run $15 to $40 per doorway. Removing old carpet or tile and disposing of it is extra.
Laying out a 12×12 floor
- Run planks parallel to the longest wall or the main light source; in this room that is the 12 ft direction.
- Check the last row before you start: 1.5 in would be left over if you used full 7.5 in planks across the 12 ft width, so split the difference between the first and last rows if it comes out under 2 in.
- Leave a 1/4 to 3/8 in expansion gap at every wall; the baseboard covers it.
- Diagonal or herringbone layouts need 15 percent waste: 166 square feet instead of 158.
- Let the boxes sit in the room for 48 hours before installing so the planks acclimate.
Common questions
How many boxes of flooring for a 12x12 room?
8 boxes at 20 square feet per box, 7 at 24, or 6 at 30, to cover 144 square feet with 10 percent waste. Check the carton for its exact coverage.
How many square feet of flooring for a 12x12 room?
144 square feet of floor, so buy 158 square feet with 10 percent waste or 166 with 15 percent for a diagonal pattern or a room with closets and angles.
How much underlayment for a 12x12 room?
2 rolls of 100 square foot underlayment for 144 square feet, unless the planks have a pad attached. Over concrete, use underlayment with a vapor barrier.