Flooring Calculator
Estimate flooring material in square feet and boxes for hardwood, laminate, vinyl, and engineered wood.
Your Flooring Estimate
- Measure the room — length and width. For multiple rooms, calculate each separately and add totals.
- Select box coverage — check the box label for square footage per box. Common sizes: 20–30 ft²/box.
- Set waste factor — 10% for standard straight-lay. 15–20% for diagonal, herringbone, or complex rooms.
- Review results — always round up to whole boxes. You can't buy partial boxes.
- Order from one lot — buy all boxes from the same production lot to ensure color consistency.
How Much Flooring Do I Need?
Flooring is sold by the box, with each box covering a specified number of square feet (usually 20 to 30 ft²). To find how many boxes you need: calculate your room's area, add 10% for waste from cuts, then divide by the box coverage and round up to the next whole box.
The waste factor matters more than you might expect. Every row starts and ends with a cut piece, and cuts along walls and obstacles generate scrap that usually can't be used. A 10% waste factor is standard for straight-lay installation. Diagonal and herringbone patterns generate 15–20% waste. Buy an extra box beyond the calculated amount for future repairs.
Flooring Cost by Type
Material costs vary widely by type and quality:
| Flooring Type | Material Cost/ft² | Install Cost/ft² | Lifespan |
|---|---|---|---|
| Laminate | $1–$5 | $2–$4 | 15–25 years |
| Luxury Vinyl Plank (LVP) | $2–$7 | $2–$5 | 20–30 years |
| Engineered Hardwood | $4–$10 | $3–$6 | 25–40 years |
| Solid Hardwood | $5–$12 | $4–$8 | 50+ years (refinishable) |
| Porcelain Tile | $2–$15 | $5–$10 | 50+ years |
| Bamboo | $3–$8 | $3–$5 | 20–35 years |
DIY installation saves $2–$8 per square foot on labor. Click-lock laminate and LVP are the most DIY-friendly. Solid hardwood and tile typically require professional installation.
Boxes by Room Size (10% waste included)
| Room | Area | 20 ft²/box | 22 ft²/box (laminate) | 30 ft²/box (LVP) |
|---|---|---|---|---|
| 8 × 10 ft | 80 ft² | 5 boxes | 4 boxes | 3 boxes |
| 10 × 12 ft | 120 ft² | 7 boxes | 6 boxes | 5 boxes |
| 12 × 14 ft | 168 ft² | 10 boxes | 9 boxes | 7 boxes |
| 14 × 18 ft | 252 ft² | 14 boxes | 13 boxes | 10 boxes |
| 16 × 20 ft | 320 ft² | 18 boxes | 17 boxes | 12 boxes |
| 20 × 20 ft | 400 ft² | 22 boxes | 21 boxes | 15 boxes |
| 20 × 30 ft | 600 ft² | 33 boxes | 31 boxes | 22 boxes |
Includes 10% waste. Check your box label for exact coverage — it varies by product. Always round up to whole boxes.
Formulas
Simple area math:
With waste = Area × (1 + Waste %)
Boxes = Total area ÷ Box coverage (rounded up)
For multiple rooms, calculate each room separately and add boxes together. Don't subtract for closets unless you're not flooring them.
Related Calculators
Add 10% waste when ordering flooring for cuts and waste. Browse the surface calculator collection.
Frequently Asked Questions
How many boxes of flooring for a 12×12 room?
A 12×12 ft room is 144 ft². With 10% waste, that's 159 ft². If each box covers 20 ft², you need 8 boxes. If boxes cover 25 ft², you need 7. Always check the box label for coverage and round up.
Which direction should flooring planks run?
The traditional rule is to run planks parallel to the longest wall or toward the main light source. In hallways, always run planks lengthwise. For open floor plans connecting multiple rooms, choose one consistent direction throughout. Running planks perpendicular to floor joists adds structural benefit but is not required for floating floors.
How much extra flooring should I buy?
Always buy at least 10% extra for a standard straight-lay installation — this covers end cuts, doorway angles, and waste. For diagonal or herringbone patterns, buy 15–20% extra. Beyond waste, order one extra box to keep for future repairs. Flooring is produced in batches (dye lots), and the same product ordered months later may not match exactly.
Can I install flooring over existing flooring?
Click-lock laminate and LVP can often be installed over existing hard flooring as long as the subfloor is flat (within 3/16 inch over 10 feet), dry, and structurally sound. However, stacking floors raises the floor height, which can cause issues at doorways, transitions, and appliances. Most manufacturers allow one layer of existing flooring underneath — check your product warranty for specifics.
What is the cheapest flooring option?
Laminate is generally the cheapest durable flooring option at $1–$5 per square foot for materials. Luxury vinyl plank (LVP) runs $2–$7/ft² but is 100% waterproof, making it better for kitchens and bathrooms. Both are DIY-friendly click-lock formats that save $2–$8/ft² in installation costs. Sheet vinyl is even cheaper but harder to repair and less durable long-term.