Linear Feet Calculator for Flooring
Flooring materials — hardwood, laminate, LVP, and engineered wood — are sold by the box with a stated square-foot coverage, but every installer thinks in linear feet. The relationship between square footage and linear feet depends entirely on plank width. Narrower planks mean more linear feet per square foot. Use this calculator to convert your room's square footage to the linear feet of planks you need, plus the number of boxes to purchase.
Linear Feet for Flooring
Calculate linear feet for flooring
10% standard, 15% diagonal, 20% herringbone
Why Plank Width Determines Your Linear Feet
The core formula connecting square feet to linear feet for flooring is straightforward but counterintuitive: narrower planks produce more linear feet. Here is why. A square foot is always 144 square inches (12 inches by 12 inches). A 2.25-inch-wide plank covers 2.25 square inches per linear inch — meaning it takes 64 linear inches (5.33 linear feet) of 2.25-inch plank to cover one square foot. A 7-inch-wide plank covers 7 square inches per linear inch, requiring only 20.6 linear inches (1.71 linear feet) to cover one square foot. The relationship is inversely proportional: halve the plank width, double the linear footage. This is why hardwood flooring in narrow 2.25-inch strips requires far more pieces and installation labor than wide-plank LVP, even for the same square footage.
Flooring Type & Typical Plank Dimensions Reference
| Flooring Type | Typical Width | LF per 100 SF | Plank Length | SF per Box |
|---|---|---|---|---|
| Narrow Strip Hardwood | 2.25" | 533 | 12" – 84" | 20 |
| Standard Hardwood | 3.25" | 369 | 12" – 84" | 20–25 |
| Wide Plank Hardwood | 5" – 7" | 240 – 171 | 24" – 96" | 20–28 |
| Laminate Plank | 5" – 7" | 240 – 171 | 48" | 18–22 |
| LVP (Luxury Vinyl Plank) | 6" – 9" | 200 – 133 | 48" – 60" | 20–22 |
| Engineered Hardwood | 5" – 7.5" | 240 – 160 | 24" – 72" | 20–28 |
| Ceramic / Porcelain Tile | 12" | 100 | 12" | 12–15 |
LF per 100 SF calculated as: 100 ÷ (plank width in inches ÷ 12), without waste. For mixed-length hardwood, average plank length is approximately 30-36 inches. Box coverage varies by manufacturer — always verify product labels.
Waste Factors by Layout Pattern
The way you orient your planks has a dramatic effect on waste. Straight-lay installations (parallel or perpendicular to the longest wall, with staggered end joints at least 6 inches apart) generate roughly 10% waste from end cuts that are too short to start the next row. Diagonal installations (laid at a 45-degree angle to the walls) produce triangular offcuts at every wall and corner, pushing waste to 15%. Herringbone and chevron patterns are the most wasteful — every piece must be precisely cut with angled ends, and the pattern does not allow re-use of offcuts from one side on the other, generating 20% or more in waste. For exotic or expensive materials, consider the layout cost: a 20% waste factor on $8/LF hardwood adds $1.60 per square foot in wasted material alone.
How to Calculate Linear Feet for Flooring: Step-by-Step
- Calculate your room square footage. Multiply room length by width. A 20x15-foot room = 300 sq ft. For irregular rooms, divide into rectangles and sum the areas. Include closets and alcoves that will receive the same flooring.
- Determine your plank width. Check your selected flooring product's specifications. Plank width is printed on the box and the product listing. If using mixed-width flooring (random-width hardwood), use the average width across all planks in the bundle.
- Convert width to feet. Divide your plank width in inches by 12. A 5-inch plank = 0.4167 feet. A 7-inch plank = 0.5833 feet. This is your coverage per linear foot — each linear foot of 5-inch plank covers 0.4167 square feet.
- Divide SF by plank width in feet. For 300 sq ft with 5-inch planks: 300 ÷ 0.4167 = 720 linear feet of plank material needed. For 7-inch planks: 300 ÷ 0.5833 = 514 linear feet. Note how the same room requires 206 more linear feet with the narrower plank.
- Apply waste based on layout. Multiply by 1.10 (straight), 1.15 (diagonal), or 1.20 (herringbone). For 720 LF straight-lay: 720 × 1.10 = 792 linear feet to purchase.
- Convert to boxes. Most flooring boxes list their square-foot coverage. Divide your adjusted square footage (300 × 1.10 = 330 sq ft needed) by box coverage (typically 20 sq ft/box). 330 ÷ 20 = 16.5 boxes, so buy 17. Always round up and buy one extra box for future repairs.
Transition Strips and T-Molding
Transition strips are the finishing pieces between different flooring surfaces — where your new hardwood meets carpet at a doorway, or where LVP meets tile in an adjacent room. These are measured and sold in linear feet, separate from the flooring planks. T-molding bridges two hard-surface floors of equal height (wood to laminate). Reducer strips transition from a taller floor (hardwood over underlayment) down to a lower surface (vinyl sheet). End cap molding finishes the exposed edge of flooring at a sliding door, fireplace hearth, or stair nosing. Each doorway or transition point typically requires 3-4 linear feet of transition strip. Count your doorways and floor-level changes to estimate transition-strip linear footage — this is separate from your flooring plank order and should be calculated per transition point.