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Flooring Calculator

Calculate flooring needed for any room. Get square footage, boxes needed, and cost estimates for laminate, hardwood, vinyl, and tile.

Flooring Worksheet
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How to Calculate Flooring

Measure your room's length and width in feet, multiply them together, then add a waste factor for cuts and mistakes. The formula: Flooring Needed = Length × Width × (1 + Waste %).

Step-by-Step Measuring

  1. Measure wall to wall (not baseboard to baseboard) — flooring goes under baseboards
  2. Use the widest points if walls aren't perfectly straight
  3. For non-rectangular rooms, break into smaller rectangles and add them together
  4. Include closets, alcoves, and hallways
  5. Add your waste factor to the total

Waste Factor Guidelines

  • 5%: Simple rectangular rooms
  • 10%: Standard rooms with some cuts (most common)
  • 15%: Complex layouts with many corners
  • 20%: Diagonal or herringbone patterns

Example: 12×14 Living Room

  • Area: 12 × 14 = 168 sq ft
  • With 10% waste: 168 × 1.10 = 185 sq ft needed
  • At 20 sq ft per box: 185 ÷ 20 = 10 boxes (round up)
  • Laminate at $5/sq ft: 185 × $5 = $925 materials

Flooring Type Comparison

  • Laminate: $4-14/sq ft installed. Easy DIY click-lock install. Not waterproof — avoid in bathrooms
  • Vinyl Plank (LVP): $4-10/sq ft installed. Waterproof, durable, works in any room
  • Hardwood: $15-30/sq ft installed. Adds home value, can be refinished. Avoid in high-moisture areas
  • Tile: $5-15/sq ft installed. Best for bathrooms and kitchens. Professional install recommended
  • Carpet: $3-11/sq ft installed. Comfortable underfoot but harder to clean

Buying Tips

  • Most laminate and vinyl plank comes in boxes covering 20-26 sq ft — always round up
  • Buy all your flooring from the same production lot to ensure consistent color
  • Keep 1-2 extra boxes for future repairs — matching discontinued products is difficult
  • Acclimate flooring in the room for 48 hours before installation to prevent expansion gaps
  • Factor in underlayment cost ($0.25-0.75/sq ft) if not already attached to the planks

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On conv.awajis.com

Square Feet to Square Meters Convert floor area to metric.

Frequently Asked Questions

How much extra flooring should I order?

Order 10% more flooring than the measured area for a standard layout, and 15 to 20% more for diagonal patterns or rooms with many corners. A 180 sq ft room laid diagonally needs 180 x 1.20 = 216 sq ft of material. Buying only the net area leaves nothing for cuts, defective planks or future repairs.

How many boxes of flooring do I need?

Divide the total area plus waste by the coverage printed on the box. Most laminate and vinyl plank boxes cover about 20 sq ft, so a 200 sq ft room plus 10% waste needs 220 sq ft, or 11 boxes. Tile box coverage varies by tile size. Buy all boxes from the same dye lot.

Do you need underlayment for laminate flooring?

Yes. Most laminate and vinyl plank flooring requires underlayment, a thin layer of foam, cork or felt laid under the planks. It adds cushion, dampens sound and evens out minor subfloor irregularities. Solid hardwood is the exception and is typically installed directly on the subfloor. Some vinyl planks have underlayment pre-attached.

Should I include closets in flooring square footage?

Yes. Measure every floor surface that will be covered, including closets, alcoves and hallways. For several rooms, calculate each room separately, add the areas together, then apply the waste percentage to the total. Flooring also runs under door casings, so measure to the wall behind the door frame rather than stopping at it.