How to measure a room for flooring
Measure wall to wall at floor level, in feet, and round each dimension up to the next half foot. Flooring runs under door jambs and into closets, so include closet floors and the strip under any doorway that gets the new floor. For an L-shaped room, split it into two rectangles, work out each area, and enter the total using the “total area” option. The square footage calculator can help with odd shapes.
Do not subtract the footprint of built-in cabinets you plan to keep unless the floor will truly stop at them. Floating floors (most LVP and laminate) are not supposed to go under heavy fixed cabinets, but nail-down hardwood often does.
Worked example: a 12 × 12 ft bedroom in LVP
These are the calculator’s default inputs: luxury vinyl plank, 10% waste, 20 sq ft per box, a pro install at the national average cost level and no underlayment.
| Step | Calculation | Result |
|---|---|---|
| Floor area | 12 ft × 12 ft | 144 sq ft |
| Area to buy | 144 × 1.10 | 158.4 sq ft |
| Boxes | 158.4 ÷ 20 = 7.92, round up | 8 boxes |
| Material | 158.4 × $1.50–$10.00 | $238 – $1,584 |
| Labor | 144 × $2.50–$6.00 | $360 – $864 |
| Total installed | material + labor | $598 – $2,448 |
The labor rate comes from subtracting the published material range from the published installed range for LVP ($4–$16 installed minus $1.50–$10 material). Notice that material drives most of the spread: entering the actual price of the plank you picked narrows the estimate far more than anything else.
Comparing flooring types
For the same 144 sq ft room, the comparison table shows how the options stack up at typical prices:
| Flooring | Installed by a pro |
|---|---|
| Carpet (with pad) | $302 – $1,224 |
| Laminate | $590 – $2,088 |
| LVP | $598 – $2,448 |
| Engineered hardwood | $1,051 – $3,110 |
| Ceramic / porcelain tile | $1,454 – $7,416 |
| Solid hardwood | $1,670 – $3,816 |
Tile has the widest range because labor is a large share of the job: setting, cutting and grouting take far longer per square foot than clicking planks together. If you are leaning toward tile, the tile calculator also works out thinset and grout.
What drives the cost
- Product grade. Thin, builder-grade LVP and thick rigid-core LVP with a premium wear layer can differ by several dollars per square foot.
- Room shape. Small rooms, closets, angled walls and many doorways mean more cuts, more waste and more labor per square foot. Raise the waste percentage for complex rooms.
- Pattern. Diagonal and herringbone layouts need about 15% waste and take longer to install.
- Subfloor condition. Floating floors need a flat subfloor. Leveling compound, plywood repairs or moisture barriers on concrete are extra.
- Location. The local cost level setting scales labor. Material prices are left at national ranges because big-box pricing varies less between regions than labor does.
DIY or hire a pro?
Click-lock LVP and laminate are the most DIY-friendly floors: you need a saw, a tapping block, spacers and patience around door casings. In the default example, doing it yourself saves the $360–$864 labor line. Nail-down solid hardwood and tile involve specialty tools, and mistakes are costly to undo, so many homeowners hire those out. Carpet is usually best left to installers, who have power stretchers and seaming irons and often bundle installation with the purchase.
What this estimate doesn’t include
Tearing out and hauling away the old floor, subfloor repair or leveling, transition strips and thresholds, removing and reinstalling baseboards or adding quarter round, moving furniture and appliances, and stairs (usually priced per step). Underlayment is optional in the calculator and uses an editorial estimate of $0.50–$1.50 per sq ft, so check whether your chosen plank already has a pad attached before adding it. If you are also repainting the room, do that first with the paint calculator so drips land on the old floor.
How this calculator works
- Floor area = length × width (or the total area you enter). Area to buy = floor area × (1 + waste %).
- Boxes = area to buy ÷ coverage per box, rounded up to a whole box.
- Material cost = area to buy × price per sq ft. Labor = floor area × (installed − material price per sq ft) × local cost factor.
- The comparison table repeats the same math for every flooring type using typical price ranges.
Assumptions and limitations
- Material prices are national 2026 ranges per sq ft for each flooring type; enter your own price to narrow the estimate to one product.
- Installation labor is estimated as the published installed price minus the material price (low end minus low end, high end minus high end), then multiplied by the local cost factor.
- Material is priced on the area including waste; labor is priced on the net floor area.
- Underlayment at $0.50–$1.50 per sq ft is an editorial estimate, not a published figure. It is skipped for carpet, whose price includes pad.
- Not included: removing old flooring, subfloor repair or leveling, transitions, baseboard and quarter round, moving furniture, and stair treads.
These results are planning estimates, not quotes. Local prices, site conditions and building codes vary, so get written estimates from licensed contractors before you commit to a budget.
Frequently asked questions
- How much extra flooring should I buy?
- Plan on about 10% extra for a straight lay in a simple room and about 15% for diagonal or herringbone patterns or rooms with many corners. Keep a spare box for future repairs, since dye lots and product lines change.
- Why does the installed price vary so much?
- Product grade drives most of it: the same "LVP" ranges from thin builder-grade planks to thick rigid-core products. Labor varies with the room shape, subfloor condition, pattern and your local market.
- Do I need underlayment?
- Floating floors such as laminate and many LVP products need underlayment unless the planks have a pad attached. Nail-down hardwood usually gets a felt or synthetic underlayment, glue-down floors usually none, and carpet uses its own pad. Follow the manufacturer instructions to keep the warranty valid.
Sources and data
- This Old House (2026) — cost to install vinyl plank flooring
- HomeGuide (2026) — flooring installation cost
- Angi (2026) — engineered hardwood flooring installation cost
- HomeGuide (2026) — hardwood flooring cost
- HomeGuide (2026) — carpet installation cost
- HomeGuide (2026) — tile installation cost
Prices are US national ranges reviewed October 2026. A few values are editorial estimates where no single published source exists; theCost Index marks each one. Read our methodology and editorial policy.